Uzbek Chemical Journal




UDK 541.49+ 546.650+543.42

1B. Y. Ruzieva, 2I. M. Tojiboeva, 1,2SH. SH. Daminova, 1,2Z. Ch. Kadirova, 3Kh. T. SHaripov


1National University of Uzbekistan named after Mirzo Ulugbek, University Street, 41, Tashkent., 2Uzbekistan-Japan Innovation Centre of Youth, University Street 2B, Tashkent, 3Institute of General and Inorganic Chemistry, Academy of Sciences Republic Uzbekistan, MirzoUlugbek Street 77A, Tashkent

Abstract. Background. The benzimidazole and N-hydroxyamides derivatives have a wide spectrum of biological activity. Besides limited literature data in field of synthesis of itscomplex compounds with rare earth elements, preparation of new mixed-ligand rare-earth metal complexes with N-hydroxybenzamide and 2-amino-1-methylbenzymidazole and study of their properties can open up new facets of coordination chemistry.

Purpose. Development of synthesis of the mixed-ligand complex compounds of La(III), Ce(III), Nd(III), Sm(III) and Ho(III) nitrates with N-hydroxybenzamide (BGK) and 2-amino-1-methylbenzymidazole (MAB), and study of the composition and structure of the synthesized complexes by modern physicochemical methods are main purposes.

Methodology. A methodology for the synthesis of mixed ligand complex compounds of some lanthanides has been developed. To synthesize mixed ligand complex compounds, an aqueous solution of the N-hydroxybenzamide was added dropwise to themetal nitrates aqueous solution with followed addition the alcoholic solution of the second MAB ligand. The reaction mixture was heated in a water bath for 30 min and left to cool. The precipitatet formed the next day was filtered and recrystalized from in boiling alcohol.

Originality. A methodology of the synthesis of the mixed ligand complex compounds of the La(III), Ce(III), Nd(III), Sm(III) and Ho(III) nitrates with N-hydroxybenzamide and 2-amino-1-methylbenzymidazole was developed. In the synthesized complex compounds, it was found that the metal atom forms an ionic bond with the N-hydroxybenzamide hydroxyl group, as well as, a monodentate bond with the nitrogen atom of the 2-amino-1-methylbenzymidazole endocyclic ring.

Findings. The composition and structure of the synthesized mixed ligand complex compounds were determined using element, X-ray phase, derivatographic analysis, FTIR-spectroscopy, SEM-EDX.

Key words: ligand, complex compound, benzimidazole, IR spectroscopy, element analysis, thermogravimetric analysis, quantum chemical calculation, composition, structure, properties.


- synthesis of mixed ligand complex compounds of lanthanides;

- the composition and structure of complex compounds


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4. Mayboroda E.I., Britsun V.N. Antibacterial activity of 2-thio-, 2-amino-substituted benzimidazoles and complexes of benzimidazole derivatives with transition metals // Pharmacy and Pharmacology. - 2014. - T. 2. - No. 2 (3).

5. Abdel-Motaal M., Almohawes K., Tantawy M. A. Antimicrobial evaluation and docking study of some new substituted benzimidazole-2yl derivatives //Bioorganic Chemistry. – 2020. – V. 101. – P. 103972.

6. Karaburun A. Ç. G., Soglu B. K. Ç., Çevik U. A., Osmaniye D., Sa glık B. N., Levent S., Özkay Y., Atlı Ö., Koparal A. S. ,Kaplancıklı Z. A. Synthesis and antifungal potential of some novel benzimidazole-1, 3, 4-oxadiazole compounds, Molecules, 24 (1), 191 (2019)

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8. Veerasamy R., Roy A., Karunakaran R., Rajak H. Structure–Activity Relationship Analysis of Benzimidazoles as Emerging Anti-Inflammatory Agents: An Overview //Pharmaceuticals. – 2021. – V. 14. – N 7. – P. 663.

9. Valentinovich C. M., Albertovna O.M., Sergeevna G.A., Albertovich A.E. STUDY OF ANTISECRETORY ACTIVITY OF DINITRATE 2-PHEN YL-9-DIET HYLAMINOET HYLimida zo [1, 2-A] BENZIMIDAZOLE BY METHOD OF CONTINUOUS PERFUSION OF RATS’STOMACHS //Pharmacy and Pharmacology. - 2019. - V. 7. - N. 4. –P. 234-239.

10. Serebrova S. Yu. Et al. Features of the pharmacokinetics and pharmacodynamics of modern proton pump inhibitors // Bulletin of the Scientific Center for Expertise of Medicinal Products. - 2013. - N. 4. –P. 26-30

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12. Singh I., Luxami V., Paul K., Synthesis and in vitro evaluation of naphthalimide–benzimidazole conjugates as potential antitumor agents //Organic Biomolecular Chemistry. -2019. –V.17 (21).–P.5349.

13. Kuo H. L., Lien J. C., Chung C. H., Chang C. H., Lo S. C, Tsai I. C., Peng H. C., Kuo S. C., Huang T. F., Naunyn-Schmiedeberg's, NP-184 [2-(5-methyl-2-furyl) benzimidazole], a novel orally active antithrombotic agent with dual antiplatelet and anticoagulant activities //NaunynSchmiedeberg's archives of pharmacology. -2010.–V.381. -N6. –P. 495

14. Aljahdali M. Synthesis, characterization and equilibrium studies of some potential antimicrobial and antitumor complexes of Cu (II), Ni (II), Zn (II) and Cd (II) ions involving 2- aminomethylbenzimidazole and glycine//SpectrochimicaActa Part A: Molecular and Biomolecular Spectroscopy. -2013. –V.112. –P. 364.

15. Natha M., Sainia P. K., Kumar A., Synthesis, structural characterization, biological activity and thermal study of tri‐and diorganotin (IV) complexes of Schiff base derived from 2‐aminomethylbenzimidazole // Applied Organometallic Chemistry. -2009. –V. 23. –N.11. –P.434.

16. Kumaravel G., Utthra P. P., Raman N. Exploiting the biological efficacy of benzimidazole based Schiff base complexes with l-Histidine as a co-ligand: Combined molecular docking, DNA interaction, antimicrobial and cytotoxic studies // Bioorganic Chemistry. -2018. –V.77. –P. 269.

17. El-Sherif A. A. Synthesis and characterization of some potential antitumor palladium(II) complexes of 2-aminomethylbenzimidazole and amino acids // Journal Coordination Chemistry. -2011. –V.64. –N.12.–P.2035.

18. Pozharsky A.F., Anisimova V.A., Tsupak E.B. Practical work on the chemistry of heterocycles. - Rostov University, 1988. -158p

To cite this article: B. Y. Ruzieva, I. M. Tojiboeva, SH. SH. Daminova, Z. Ch. Kadirova, Kh. T. SHaripov. Synthesis and study of mixed-ligand complex compounds of rare earth elements on the basis of 2-amino-1-methylbenzymidazole and n-hydroxybenzamide // Uzbek chemical journal. -2021. – Nr4. - Pp.3-12. 

Received: 22.06.2021; Accepted: 22.08.2021; Published: 10.09.2021


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UDK 546.71.74

M. R. Ibragimova, T. A. Azizov, L. A. Sharipova


Institute of General and Inorganic Chemistry of the Academy of Sciences of the Republic of Uzbekistan, е-mail:

Abstract. Background. Currently, one of the promising areas of inorganic chemistry is the study of coordination compounds of 3d metals with organic nitrogen-containing ligands that exhibit different types of biological activity. They are used in various sectors of the national economy.

Purpose. The aim of the study is the synthesis and physico-chemical study of mixed amide coordination compounds of nickel (II) and manganese (II) nicotinates with acid amides.

Methodology. Elemental analysis, X-ray phase analysis, electronic diffuse reflection spectra, differential thermal analysis, quantum chemical calculation

Originality. The synthesis of three mixed amide coordination compounds of manganese and nickel nicotinates with CH3CONH2, CS(NH2)2 and NC4H5CONH2 was carried out. The dependence of the composition, structure and properties of complex compounds on the nature of the complex-forming agent, the methods of coordination of organic ligands is established.

Findings. The structure of new compounds, the coordination of organic and acidoligands, the structure of the coordination node and the coordination number of the central atom were determined by spectral and cavant-chemical calculation methods. The thermal properties of the compounds were determined and the products of thermal degradation were identified.

Key words: electronic spectrum, solid-phase method, interplane distance, heat of formation, distorted octahedron.


-a solid-phase method for obtaining metal complexes is proposed.

-the distortion of the octahedral configuration due to the covalence of the Ni-O bond is justified.

-the preferred ligand coordination centers were determined.


1. Savinkina E.V., Albov D.V., Buravlev E.A., Zamilatskov I.A. Synthesis and structure of polyiodides of acetamide complexes of transition elements. // Journal. inorgan. Chemistry, 2007, 52, No. 7, 1133–1139. (in Russian)

2. D.V. Golubev, D.V. Albov, V.V. Kravchenko, L.Yu. Alikberova, N.S. Rukk. Structural features of crystalline complexes of iodides of some rare-earth elements with carbamide and acetamide // Coord. chemistry. - 2010. - Volume 36.-S. 831. (in Russian)

3. Zh.M. Ashurov, M.A. Ziyaev, S.A. Talipov, B.T. Ibragimov. Synthesis and structure of tetra-aqua-bis- (nicotinate) manganese (II) // Uzbek chemical journal - Tashkent, 2013. - No. 6 - P. 18-20. (in Russian)

4. Kozlevcar, B .; Lah, N .; Leban, I .; Turel, I .; Segedina, P .; Petric, M .; Pohleven, F .; J. P White, A .; Williams, D .; Giester, G. Fatty Acid Copper (II) Carboxylates with Nicotinamide - Characterization and Fungicidal Activity. Crystal Structures of Two Heptanoate Forms and Nonanoate //. - Croatica Chemica acta, -1999.72, -P. 427-441.

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7. Chun-Wei Yeh, Maw-Cherng Suen, Hui-Ling Hu, Jhy-Der Chen, Ju-Chun Wang Synthesis and structural characterization of two new chiral coordination polymers of Cu (nicotinate) 2 (H2O) and Co (nicotinate) 2 //. Polyhedron - 2004 - V.8 - P. 1947-1952

8. Tomislav Friščić, Ivan Halasz, Vjekoslav Štrukil, Mirjana Eckert-Maksić, and Robert E. Dinnebierd Clean and Efficient Synthesis Using Mechanochemistry: Coordination Polymers, Metal-Organic Frameworks and Metallodrugs // Croat. Chem. Acta - 2012. - Issue 85 (3) - P. 367–378

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To cite this article: M. R. Ibragimova, T. A. Azizov, L. A. Sharipova. Complex compounds of Mn(II) and Ni(II) nicotinates with some amides // Uzbek chemical journal. -2021. – Nr4. - Pp.12-18. 

Received: 30.07.2021; Accepted: 30.08.2021; Published: 10.09.2021


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UDK 678.01

Sh. Sh. Umarov, P. J. Tojiev, X. X.Turaev, A.T. Djalilov


Termez State University, 1OOO Tashkent Scientific Research Institute of Chemical Technology, E-mail: 

Abstract. Background. Polyethylene (PY-342) and polyamide (PA-6) are the largest-tonnage, available and demanded from the whole range of polymers produced by the industry. Therefore, the search for technical solutions aimed at simplifying the processing of polyolefins and creating new types of composite materials based on them is an urgent task.

Purpose:  to study the possibility of creating thermoplastic composites based on polyolefins (PO) with improved properties (physical, mechanical, physicochemical, thermophysical, electrophysical, magnetic, optical, etc.).

Methodology. The physical and mechanical properties of filled polypropylene and polyamide compositions, the melt flow rate were determined by viscometry, flexural strength (two-support bending), Charpy impact strength.

Originality. The rheological characteristics of composite materials based on polyethylene with metal oxides have been determined.

Findings. To obtain a composite material based on polyethylene the content of metal oxides was changed from 1 mass to 5 mass parts. Evaluation of the rheological properties of filled composites showed that with an increase in the content of metal oxides, the fluidity of the compositions decreases, but the resulting compositions can be processed by injection molding. The data obtained show that the optimal are compositions containing: 5 mass.h. metal oxides.

Key words: polyethylene, polyamide-6, metal oxides, atomic force microscopy, physicochemical and mechanical properties.


- the physical and mechanical properties of the developed compositions were studied;

- for this purpose metal oxides were used as fillers.


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4.GOST 4647-80 (ASTM D 638). Plastics. Method for determining the Charpy impact strength. Enter. from 01.06.1981.-С.27

5.GOST 11262-80 (ASTM D 638). Plastics. Tensile test method. Enter. from 01.12.1980.-С.16

6. Chukov NA Composite materials based on polypropylene and nanosized fillers: Diss ... cand. tech. sciences-Nalchik, 2011.- 110 p .: ill. RGBOD, 61 11-5 / 1845

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8. Kiviranta L., Kumpulainen S. Quality Control and Characterriation of Bentonite Mate-rials // PosivaOY.– 2011. - P.102.

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10. Tozhiev P.Zh., Normurodov B.A., Turaev Kh.Kh., Nurkulov F.N., Dzhalilov A.T. Study of physical and mechanical properties of highly filled polyethylene compositions // UNIVERSUM: Chemical technology: electronic scientific journal. -2018.-No.2 (47).

11. Mozzhukhin VB The influence of technological equipment and technology for obtaining highly filled compositions based on polyolefins on their physical and mechanical properties / VB Mozzhukhin et al. // Plastic mass. - 2013. - No. 1. - P. 54–56.

12. B.A. Normurodov, P. Zh.Tozhiev, Kh.Kh. Turaev, A.T. Dzhalilov, F.N. Nurkulov Study of physical and mechanical properties of basalt-containing polyethylene compositions // Composite materials.-Tashkent. -2017.-№ 4.-С.10-12

13. Kryzhanovsky, VK Production of products from polymeric materials, study guide / VK Kryzhanovsky et al. - St. Petersburg. : Profession, 2014 .-- 592 p.

14. Bredikhin P.A., Kadykova Yu.A. Investigation of the properties of PCM filled with dispersed basalt // V International student electronic scientific conference “Student scientific forum.” - 2013.

To cite this article: Sh. Sh. Umarov, P. J. Tojiev, X. X.Turaev, A.T. Djalilov. Structure and properties of polymers filled with metal oxides // Uzbek chemical journal. -2021. – Nr4. - Pp.12-18. 

Received: 30.07.2021; Accepted: 30.08.2021; Published: 10.09.2021


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UDK 666:942

1Sh. S. Namozov, 1M. Iskandarova, 2N. R. Ruziev, 1D. K. Adylov


1 Institute of General and Inorganic Chemistry of the Academy of Sciences of the Republic of Uzbekistan, 2АО «Навоийский горно-металлургический комбинат»

Abstract. Background. In connection with the increase in the production of cements, the search for raw materials of technogenic origin, the development of highly reactive compositions of raw mixtures is relevant.

Purpose: to develop of compositions of low-carbonate and high-reactive compositions of raw mixtures and low-temperature technology of SAG clinkers and cements based on them.

Methodology. The calculation of the compositions of raw mixtures was carried out according to an independently developed methodology. Standard equipment was used for firing, allowing for clinker firing and cement testing. The reactivity of raw mixtures was studied using a complex of physicochemical methods.

Originality. The sequence of the formation of minerals in the process of firing SAG raw mixtures has been established. It has been shown that in the process of low-temperature firing of the SLA of raw mixtures, including screening of limestone, phosphogypsum and copper slags of flotation concentration, minerals stably coexist in the temperature range of 1150-1200°C.

Findings. The compositions of low-basic raw mixtures were calculated. The sequence of formation of sulfominerals and the temperature range of stable existence during firing with different values of modular characteristics were determined, the physicochemical parameters of cements based on SAG clinkers were determined.

Key words: industrial waste, phosphogypsum, limestone, copper smelting slag, roasting, clinker, cement, strength.


- low-temperature technology for burning clinker SOL;

- technology contributes to the improvement of the environment,

- it reduces the cost of cement without reducing the volume of production.


1. Atakuziev T.A., Mirzaev F.M. Phosphogypsum-based sulfomineral cements. - Tashkent: Fan of the Uzbek SSR, 1979. - 152. p.

2. Makhmudova N.A., Babakulova N.B., Muminova N.A. Economic and environmental aspects of the use of secondary raw materials // Universum: technical sciences: electron. scientific. zhurn.-2018.-№ 12 (57). URL: .

3. Numonov B. O., Badalova O. A., Namazov Sh. S. and Seytnazarov A. R. Solid phosphoric-calcium and liquid nitrogen-sulfur fertilizer by deep ammonization of phosphoric acid gypsum pulp // Scientific Bulletin of Namangan State University: Vol. 2: Iss. 9, Article 8.-2020. - S. 50-57. Available at:

4. Atakuziev T.A., Adinaev Kh.A., Shamadinova N.E. Low-temperature fired cements based on industrial waste // Universum: technical sciences: electron. scientific. zhurn. 2018. No. 1 (46). URL:

5. Atakuziev T.A., Bobokulov A.N., Dzhandullaeva M.S. et al. Influence of iron-containing slags on the properties of silicate materials from dolomite lime // Universum: technical sciences: electron. scientific. zhurn. -2019.-No. 8 (65). URL:

6. Krivoborodov. Yu.R. Physicochemical properties of sulfated clinkers // Analytical review of VNIIESM. - M. Cement Industry, 1991.-Series 1. - 55 s

7. Samchenko. S.V. Sulphated calcium aluminoferrites and cements based on them.-M .: RKhTU im. D.I. Mendeleev, 2004. - 120 p.

8. Osokin A.P., Krivoborodov Yu.R., Potapova E.N. Modified Portland cement. –M: 1993. –S.328.

9. Atabaev F.B., Mironyuk N. A., Suyunov T.Kh., Iskandarova M. I .. The production technology of the modified phospite and its application by production of portlandsements // International Porous and Powder Materials. Symposium and Exhibition. PPM 2015 15-18 September. -2015.-V 2. Cesme Izmir-TURKEY. -R. 538 - 543.

10. Troshin MA, Kerzhner AM, et al. Experimental evaluation of the applicability of calcium sulfate phosphohydrate from a one-stage hemihydrate process of EPA for the production of gypsum stone - regulator of the setting time of cement. -M. Proceedings of NIUIF, 2009. –S. 136-154.

11. Iskandarova M., Begjanova G.B. Technology of obtaining portlandcement with the use of a new active mineral additive - "Fosfozol" // Austrian Journal of Technical and Natural Sciences.-2017.-No. 7-8. - R. 24-27.

12. Iskandarova M.I., Begzhanova G.B. The production of Portland cements with a new active mineral additive "Phosphozol" has been mastered at JSC "Akhangarancement" // Zh: Universium: technical sciences. - Moscow. - No. 12 (45). - 2017. - S. 42-43.

13. Iskandarova M .. Negmatov S.S. Atakuziev T.A. Negmatova M.Y. The low temperature technology of sulfoalumoferruteros cement resursion on a basis of sulfate ferry ferrous waste products and row materials of Uzbekistan // 15- Internationale Baustofftagung. F.F. Findev-lnstitut fur Baustofkunde. Bauhaus Universitet. - Bundes repablic Deutschland. 2003. -P.1-0749-1-0755.

14. Negmatov C.S., Ruziev H.P., Farmanov A.K. Khaidarov R. Iskandarova M. Complex processing of copper-smelting production waste of AMMC into low-temperature cements and cement compositions // Zh. Mining. Specialist. issue.-№8.-2009. - S. 80-84.

15. V. Makhmudova, M. Iskandarova, Y. Ivanova, G. Chernov, N. Ruziev. Sunthesis and properties of sulfhoferrite calcium clinkers and low temperature cements on their basis // Jornal of Chemikal Technological and Metallyrgy. -Bulgary. -2011.-46, 2.- P. 151-154.

To cite this article: Sh. S. Namozov, M. Iskandarova, N. R. Ruziev, D. K. Adylov. Technology for producing clinkers using phosphogypse and copper slags of flotation enrichment JSC "AGMK" and properties of cement on their basis // Uzbek chemical journal. -2021. – Nr4. - Pp.24-31. 

Received: 30.07.2021; Accepted: 23.08.2021; Published: 10.09.2021


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UDK 544.72

D. A. Xadjibaev, D. А. Muxammadieva, F. I. Erkabaev, A. M. Hurmamatov


Institute of General and Inorganic Chemistry of the Academy of Sciences of the Republic of Uzbekistan, E-mail:

Abstract. Background. Promising natural minerals for softening and purifying industrial and waste waters are bentonite, vermiculite, kaolinite, glauconite, which have fairly high performance characteristics. The presence of deposits with reserves of these minerals creates the prerequisites for their study to obtain sorption materials.

Purpose: comparison of samples of glauconite minerals from different deposits and selection among them suitable for processing.

Methodology. Objects - samples of glauconite raw materials from Parkent, Bukhara and Karakalpak deposits. Their chemical and mineralogical analysis was carried out, and their fractional composition was determined.

Originality. It was determined that the main part of the glauconite mineral (50-55%) is in fractions of 0.08-0.125 mm. The optimal raw material is a sample of the mineral glauconite from the Parkent deposit; it contains relatively more potassium, which is exchanged with other cationic forms of metals in the process of sorption.

Findings. Based on the study of glauconite samples from the Parkent, Bukhara and Karakalpak deposits, it has been established that the composition of the samples from the Parkent and Bukhara deposits is relatively close. It was determined that samples of fractions below 0.125 mm, which contain more of the main mineral, are most suitable for processing. A suitable deposit was selected for obtaining an environmentally friendly adsorbent by processing the glauconite mineral.

Key words: natural minerals, glauconite, thermal analysis, fraction, enrichment, sorbent.


- the chemical and mineralogical compositions of the glauconite mineral of three deposits have been determined;

- the best raw materials are from the Parkent deposit "Changi".


1. Kozlov, A.I. Application of peat adsorbent for cleaning galvanic wastewater / A.I. Kozlov, V.I. Kondibor; Belarusian. Gosud. polytechnic. academy. - Minsk, 1994.-12 p (in Russian).

2. Voropanova, A.A. Use of sawdust for wastewater treatment from hexavalent chromium / AA Voropanova, SG Rubanovskaya // Ecology and Industry. - 1998. - No. 1. - P. 22-24 (in Russian).

3. Removal of heavy metals from wastewater using sawdust as a sorbent / Yu Bin, Shukla Alka, Shukla Shyam S., Dorris Kenneth L.J. Hazardous Mater; 2000. - No. 1-3, 33-42 p (in English).

4. SanPiN Hygienic requirements for the protection of surface waters. M .: Publishing  standards. 2000. (in Russian).

 5. GN Maximum permissible concentration (MPC) of chemical substances in the water of water bodies for household and drinking and cultural and household water use. M .: Publishing  standards. 2003. (in Russian).

6. Tarasevich, Yu. I. Structure and surface chemistry of layered silicates / Yu. I. Tarasevich; Kiev: Naukova Dumka. - 1988 .-- 248 p. (in Russian).

7. Shashkova I.L., Ratko A.I., Milvit N.V., Dyachenko A.G., Evening V.A. Extraction of heavy metal ions from aqueous solutions using natural carbonate-containing tripoli // ZhPKh. -2000, vol. 73, no. 6. P.915-919 (in Russian).

8. Bryzgalova N.V., Nikiforov A.F. et al. Theory and practice of using natural sorbents based on opal-cristobalite rocks of the Middle Urals // Ecological and water management bulletin. Ekaterinburg. - 2001. - Issue. 5, pp. 35 - 38. (in Russian).

9. Shidlovskaya I.P. Complex utilization of wastewater from copper smelting enterprises. Dissertation for the degree of Candidate of Technical Sciences. Ekaterinburg, 2006.141 p. (in Russian).

10. Report on the topic "Development of a project for the rehabilitation of the Sak-Elga River, Ryzhego Brook and the Atkus River" // Russian Research Institute for the Integrated Use and Protection of Water Resources (FGUP RosNIIVKh), 2004, 92 p. (in English)-???.

11. Materials for the classification of clay minerals // Information Bulletin of the Commission for the Study of Clays; Moscow: IGEM AN SSSR, 1961 .-- 90 p. (in English)???.

12. Jiang Kan, Sun Tie-heng, Sun Li-na. Adsorption characteristics of copper, lead, zinc and cadmium ions by tourmaline // J. Environ. Sci. - 2006. - No. 6.- vol. 18. - S. 1221-1225. (in English).

13. Strubel, G. Mineralogical dictionary / G. Strubel, Z. Zimmer; - M .: Nedra, 1987 .-- 494 p. (in English)???.

14. Naumov SV Modern methods for determining the particle size distribution of powdery components of welding materials. Naumov // Bulletin of PSTU. Mechanical engineering, Materials science. - 2012. - Vol. 14, No. 1. - S. 76-84. (in Russian).

To cite this article: D. A. Xadjibaev, D. А. Muxammadieva, F. I. Erkabaev, A. M. Hurmamatov. Selection of fields of mineral raw materials for glauconite sorbtion materials production // Uzbek chemical journal. -2021. – Nr4. - Pp.31-37

Received: 07.07.2021; Accepted: 24.08.2021; Published: 10.09.2021


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UDK 666.

A. A. Eminov, Sh. S. Namazov, A. B. Anvarov


Institute of General and Inorganic Chemistry of the Academy of Sciences of the Republic of Uzbekistan

Abstract. Background. Currently, the production of import-substituting types of refractory materials for the lining of high-temperature furnaces is an urgent problem. In this regard, one of the ways to solve the problem is the development of optimal compositions of refractory, in particular high-silica masses based on domestic raw materials and the study of the main physical and mechanical properties after their heat treatment.

Purpose: to determine the possibility of obtaining high-silica refractory masses based on a double and triple composition of high-silica rocks and kaolin clays of the Republic as a raw component.

Methodology. Experimental work was carried out using physical and chemical methods and classical physical and mechanical tests of ceramic and refractory technology.

Originality. The optimal temperatures of heat treatment, fractional and component composition of refractory masses based on a double and ternary composition using quartzite, quartz sand and kaolin have been determined Received data.

Findings. The effect of the added kaolin and the replacement of quartzite with quartz sand on the physical and mechanical properties of refractory materials is established, the maximum amount of raw materials, in particular Angren secondary kaolin and Dzheroi sand, to the quartzite mass for the development of the optimal composition of high-silica refractory masses is revealed. It was found that the amount of added kaolin in the double composition "quartzite-kaolin" should be up to 25 wt%, and the replacement of quartzite with quartz sand in the triple composition "quartzite-kaolin-quartz sand" should also be up to 25 wt% with the corresponding content of added kaolin. On the basis of the results obtained, optimal compositions have been developed for high-silica refractory masses.

Key words: refractory mass, high-silica, double, triple, composition, quartzite, kaolin, quartz sand, fractional composition.


- the material composition and properties of the studied raw materials were investigated;

- the optimal component and fractional compositions of refractory masses were developed.


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13. Eminov A.A., Kadyrova Z, Abdullaeva R.I. Development of composition of dinas refractory mass based on local resources of Uzbekistan Journal of Chemical technology and Metallurgy, Bulgaria, Sofia, 2017, vol. 52, No. 1, P.93-97.

14. Eminov A.A., Abdullaeva R.I., Kadyrova Z.R. Influence additives of clayed on characteristic refractory masses of Dinas. Journal of Biological and Chemical Research, Delaware, USA, 2016, vol. 3, N8. -P. 222-226

To cite this article: A. A. Eminov, Sh. S. Namazov, A. B. Anvarov. Properties of a refractory mass based on double and triple composition using quartzite, quartz sand and kaolin // Uzbek chemical journal. -2021. - Nr4. - Pp.37-44. 

Received: 09.08.2021; Accepted: 30.08.2021; Published: 10.09.2021


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UDK 631.85+631.41

O. V. Myachina, R. N. Kim, L. E. Mamasalieva, B. A. Pulatov, O.S. Narzullaev, A. Kh. Rakhmonov, S. A. Burieva


Institute of General and Inorganic Chemistry of the Academy of Sciences of the Republic of Uzbekistan

Abstract. Background. At present, in chemical and agricultural science, the concept of using specialized fertilizers designed for specific climatic conditions and crops is being developed, with the aim of: 1. applying the best form of fertilization (Right Source); 2. in the optimal dose (Right Rate); 3. in the required time frame (Right Time); 4. in the most appropriate way (Right Place). Taking into account the 4R-strategy, scientists of the Institute of National Economy and Development of the Academy of Sciences of the Republic of Uzbekistan are developing single and complex fertilizers intended for irrigated agriculture in sierozem conditions, taking into account the high biological activity of soils and the accelerated transformation of nutrient NPK elements.

Prolonged fertilizers provide a slower and more gradual release of nutrients into the soil solution, which reduces the rate of circulation of macronutrients, minimizing their losses and increasing the utilization rate.

Purpose: Determination and comparison of the agrochemical efficiency of new prolonged phosphorus single and complex fertilizers, their effect on the growth, development and yield of cotton, as well as the dynamics of the content of humus, mobile and gross forms of phosphorus and nitrogen in irrigated typical gray soil.

Methodology: The selection and analysis of soil samples was carried out from the arable horizon during the periods of the main phenological phases of the development of cotton plants. Harvesting, phenological observations, descriptions and counts in the experiments were carried out in accordance with the methods of NIISSiAVKh. The content of total and available nitrogen N total was studied in the soil; NH4+ and NO3-; P total and P2O5; carbon (humus). Statistical and correlation analysis was carried out using STATISTICA.10 and Excel (Data Analysis package).

Originality. For the first time, the influence of new slow-dissolving single and complex phosphorus fertilizers on the development of plants and the yield of cotton, as well as the content of gross and mobile forms of macroelements in dynamics by the phases of plant development has been shown, relationships and dependences of the agrochemical regime of the soil and indicators of plant productivity have been revealed.

Findings. It was found that the use of slow-dissolving single and complex phosphorus fertilizers, due to the altered properties of the granules, reduces the intensity of mineralization of N- and P-compounds, optimizing nutrition and accelerating the development of plant organs (by 7.4 and 3.7%), which is expressed in the formation a greater number of fruit elements and, accordingly, an increase in yield (by 14.4 and 16.3% compared to the control).

The slow-acting properties of fertilizers make it possible to provide plants with adequate nutrition without excess and, accordingly, without loss of macronutrients, and to achieve a positive balance in nitrogen and phosphorus in the soil with an increase in yield.

Key words: prolonged action, fertilizers, phosphorus, nitrogen, transformation, typical gray soil, harvest, cotton


- the use of fast- and slow-dissolving fertilizers has features of the use of phosphorus and nitrogen by cotton under irrigation conditions;

- a decrease in the rate of transformation of macronutrients contributes to an increase in soil fertility and an increase in productivity, providing adequate nutrition for the plant in the current growing season and determining the potential reserve for the next season;

- the contribution of macronutrients to the formation of the vegetative and reproductive mass of plants is shown, close interrelationships and dependences of the agrochemical regime of the soil and the growth of cotton are shown.


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2. Jianbo Shen, Lixing Yuan, Junling Zhang, Haigang Li, Zhaohai Bai, Xinping Chen,Weifeng Zhang, and Fusuo Zhang (2011) Phosphorus Dynamics: From Soil to Plant.// Plant Physiology Ò. -July 2011. -Vol. 156. -Рp. 997–1005

3. M. Shahbaz Akhtar, Yoko Oki, Tadashi Adachi, Y. Murata, Md. H. R. Khan (2007) Relative Phosphorus Utilization Efficiency, Growth Response, and Phosphorus Uptake Kinetics of Brassica Cultivars under a Phosphorus Stress Environment.// Communications in Soil Science and Plant Analysis. -Volume 38. -2007. -Issue 7-8. -Рр. 1061-1085.

4. Prem S. Bindraban, Christian O. Dimkpa, Renu Pandey (2020) Exploring phosphorus fertilizers and fertilization strategies for improved human and environmental health// Biology and Fertility of Soils. -2020. 56: -Рp. 299–317.

5. Syers, J.K., A.E. Johnston, D. Curtin (2008) Efficiency of soil and fertilizer phosphorus use. Reconciling changing concepts of soil phosphorus behavior with agronomic information. FAO fertilizer and plant nutrition Bulletin No. 18. Rome: FAO. -123 p.

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10. Anshu S. Chatli, Viraj Beri B. S. Sidhu (2008) Isolation and characterisation of phosphate solubilising microorganisms from the cold desert habitat of Salix alba Linn. in trans Himalayan region of Himachal Pradesh.// Indian J. Microbiology. -June 2008. -48. -Рp.267–273

11. Goenadi DH, Siswanto SY (2000) Bioactivation of poorly soluble phosphate rocks with phosphorus solubilizing fungus//Soil Sci Soc.-America J.-64.-Рp.927–932

12. Alam M. M., Ladha J. K. (2004). Optimizing phosphorus fertilization in an intensive vegetable–rice cropping system. //Biol. Fertil. Soils. -40.  -Рp.277–283.

13. Yudi Wu , Simeng Li, Gang Chen (2020) Impact of Humic Acids on Phosphorus Retention and Transport.// Journal of Soil Science and Plant Nutrition.//

14. Harry Pickering,  Neal Menzies, Malcolm Hunter. (2002) Zeolite/rock phosphate - A novel slow release phosphorus fertilizer for potted plant production.// Scientia Horticulturae. 94(3-4).-Рp.333-343.

15. Turgumbaeva Kh.Kh., Lapshina I.Z., Beysekova T.I., Shanbaev M.Zh., Sarsembin U.K. Innovative methods of processing waste from the phosphorus industry. // Environmental, industrial and energy safety. - 2017. Collection of articles of the scientific and practical conference from Int. participation. Publisher: "Sevastopol State University" (Sevastopol). -2017. - 228-230 pMethods of Soil, Plant, and Water Analysis: A manual for the West Asia and North Africa region. Third Edition. //International Center for Agricultural Research in the Dry Areas (ICARDA). -2013. -536 p.

16. Marc Pansu Jacques Gautheyrou. 2006. Handbook of Soil Analysis Mineralogical, Organic and Inorganic Methods. Springer.

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To cite this article: O. V. Myachina, R. N. Kim, L. E. Mamasalieva, B. A. Pulatov, O.S. Narzullaev, A. Kh. Rakhmonov, S. A. Burieva. Optimization of the agrochemical potential of irrigated serosem by application of phosphoric slow-running fertilizers // Uzbek chemical journal. -2021. - Nr4. - Pp.44-54. 

Received: 10.08.2021; Accepted: 30.08.2021; Published: 10.09.2021


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UDK 66.074.3; 620.193:665.511;  625.35; 628.5

V. P. Guro, F. M. Yusupov, Sh. J. Shamsiev, M. A. Ibragimova, Kh. F. Adinaev, V. G. Lisitsyn


Institute of General and Inorganic Chemistry of the Academy of Sciences of the Republic of Uzbekistan

Abstract. Background.  Associated acidic waters of a gas processing plant contain hydrogen sulfide. which is corrosive to metal equipment. The developed technology for its neutralization is being refined as it prepares for implementation.

Purpose: to make useful additions to the technology of electrochemical treatment of acidic waters of a gas processing enterprise, related to sludge settling devices.

Methodology. The object of the study is the associated water of Mubarek Gas Processing Plant LLC. The concentration of hydrogen sulfide was monitored, electrochemical measurements were carried out on a PI-50-1 potentiostat.

Originality. Additions were made to the technology of electrochemical treatment of acidic waters of a gas processing plant, which deepen the degree of their purification and disposal of sludge.

Findings. The kinetic regularities of the reactions of hydrogen sulfide oxidation in water have been revealed. The calculation of the parameters of the sludge settler and the absorption electrocatalytic unit of the Mubarek gas processing plant has been carried out.

Key words: hydrogen sulfide, sulfide ions, Fe (II), Fe (III) ions, carbon steel, anode material, electrolysis.


- additions into the hydrogen sulfide neutralization technology were made;

- calculations on the settler and the catalytic installation were performed.


1. Guro V.P., Ibragimova M.A., Yusupov F.M .. Shamsiev Sh.Dzh., Adinaev Kh.F. Abdikamalova A.B. Development of technology for electrolysis water treatment of LLC "Mubarek GPP" from hydrogen sulfide // Uzbek. chem. g.-2021.-№3. - S. 1-10.

2. Construction norms and rules SNiP 2.04.03-84. Water supply. External networks and facilities. Registered by Rosstandart as SP 31.13330.2010. Date of introduction 1985-01-01.

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4. Manual for the design of facilities for water purification and preparation (to SNiP 2.04.02-84). Approved by order of the Research Institute of KVOV AKH them. KD Pamfilov dated 9.04.1985, No. 24.-M .: Central Institute of Typical Design, 1989. -111 p.

5. Reference manual to SNiP 2.04.03-85. Design of waste water treatment facilities. - M .: VNII VOD GEO Gosstroy USSR. Stroyizdat, 1990 .-- 111 p.

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9. Wastewater use in circulating and closed water supply systems Properties and classification of waters. Lecture notes. :26d4bdd99dc68008639ab5fa6a60235f94474c94 / latest / 250842 / index.html

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12. Gudkov A.G. Mechanical wastewater treatment: textbook.- Vologda: VGTU, 2003.-152s.

13. Yakovlev S.V. Voronov Yu.V. Water disposal and wastewater treatment: a textbook for universities. - M .: ASV, 2004 .-- 704 p.

14. Girgidov A.D. Mechanics of liquid and gas (hydraulics). -SPb. : Publishing house of Polytechnic. University, 2007.-545 p.

15. Tavartkiladze I. M., Kravchuk A. M., Nechipor O. M. Mathematical model for calculating vertical sedimentation tanks with a part ition // VST: Water supply and sanitary engineering.-2006.-№1. Part 2.- S. 39-42.

16. Korenkov A.D. Dynamic model of sedimentation processes - sediment compaction in sedimentation tanks // Ecology and Industry of Russia. -2010.-No.10.- S. 36-39.

17. Bemessungsregeln fQr Nachklarbecken / Koster Stephan // WWT: Wasserwirt. Wassertechn .: Das Praxismagazin fQr Entscheidungen im Wassermanagement.-2005.- No. 1-2.-C. 22-24.

18. Wang Ren. Yu Qing-jiang. Che Ji-fang // China Water and Wastewater. 2004. No. 9. S. 96-97.

19. Application for Patent RUz Reg. No. IAP 2019 0409. Method for water purification from hydrogen sulfide and sulfides. Applicant - IONKH AN RUz. Authors: Shamsiev Sh.Dzh., Guro V.P., Yusupov F.M. Date of registration 07.10.2019.

To cite this article: V. P. Guro, F. M. Yusupov, Sh. J. Shamsiev, M. A. Ibragimova, Kh. F. Adinaev, V. G. Lisitsyn. Final stage of electrolysis cleaning technology of Mubarex GPP LLC water from hydrogen sulfide // Uzbek chemical journal. -2021. - Nr4. - Pp.54-60. 

Received: 22.06.2021; Accepted: 30.08.2021; Published: 10.09.2021


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UDK 631.895:631.85:631.812.1

1D. E. Fisher, 1Sh. Baybashcheva, 1E. N. Ramazanova, 1B. Tolkyn, 1N. N. Eserkeeva, 1S. Usmanov, 2B. S. Zakirov


1«Institute of chemical sciences named after A.B.Bekturov» JSC, Almaty, Republic of Kazakhstan, 2Institute of General and Inorganic Chemistry AS Uzbekistan, 77a M.Ulugbek str., Tashkent 100170, Uzbekistan,

Abstract. Background. Ammophos used in plant growing has a disadvantage - a low utilization rate of phosphorus pentoxide. To increase the agrochemical efficiency, it is combined with brown coal and humates.

Purpose. Determination of equilibrium moisture content, caking, moisture capacity and commercial characteristics of ammophos enriched with brown coal, solid and liquid sodium humates.

Methodology. Physicochemical methods were used to control the properties of products: hygroscopicity by the Pestov method, moisture capacity by the method of moisture absorption, etc.

Originality. The values of moisture sorption at a relative atmospheric humidity of 40, 60, 80 wt.%, Moisture capacity, caking of ammophos, its commercial characteristics when enriched with brown coal, solid and liquid sodium humates have been determined. Found conditions for drying, bulk storage and transportation, mechanized application to the soil.

Findings. It was found that fertilizers have a low equilibrium moisture content, high moisture capacity, and do not cake. The obtained data served as a scientific basis for bulk storage, transportation and mechanized seasonal application to the soil.

Key words: ammophos, brown coal, sodium humate, equilibrium moisture content, moisture capacity, commercial properties.


- physicochemical and commercial properties of ammophos;

- enrichment of ammophos with brown coal, sodium humates;

- the conditions for drying, bulk storage and transportation are justified.


1. Pestov N.Ye. Physicochemical properties of granular and powdery chemical products, Moscow-Leningrad: AN SSSR, 1947, 239 p.

2. Usmanov S., Toipasova U.M., Omarova G.T., Makhmudov R.U., Mambetzhanova I.T., Usmanov Kh.S., Usmanov A.S. Development of technology and study of agrochemical efficiency of enriched and complex fertilizers.-Almaty: 2017.-168 p.

3. Brodsky A.A., Bukkolini N.V., Markova M.L. Organomineral fertilizers based on ammonium phosphates and Bashkir brown coals. // Abstracts. 17th Mendeleev Congress on General and Applied Chemistry. - Kazan, 2003 .-- 77 p.

4. Umarov T.Zh., Pobedonostseva OI, Beglov B.M. Obtaining a complex phosphorus-nitrogen-humic fertilizer called FAGUM. // Chem. prom-th. - 2004. - No. 6. - S. 313–316.

5. Pat. 2279417 Russia. Method of teaching granular phosphorus, humate-containing fertilizers / Syrchenkov A.Ya., Levin B.V., Grishaev I.G., Resenkov M.I., Kovalev S.I., Nazarov Yu.V., Boston S.V., Yarovaya T.G., Latina N.V .; publ. 10.07.2006, Bul. No. 51. - 2 p.

To cite this article: D. E. Fisher, Sh. Baybashcheva, E. N. Ramazanova, B. Tolkyn, N. N. Eserkeeva, S. Usmanov, B. S. Zakirov. Research of physico-chemical and commodity properties of ammophos enriched with brown coal, solid and liquid sodium humate // Uzbek chemical journal. -2021. - Nr4. - Pp.60-66. 

Received: 22.06.2021; Accepted: 30.08.2021; Published: 10.09.2021


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UDC 547.548.737             

1B. KH.  Alimnazarov, 2A. B. Ibragimov, 3D. I. Abduvakhidov, 3A. S. Normamatov, 4J. M. Ashurov, 4B. T. Ibragimov


1Termez State University, 43 Barkamol Avlod str., Termez 190111, Uzbekistan, 2Institute of General and Inorganic Chemistry AS Uzbekistan, 77a M.Ulugbek str., Tashkent 100170, Uzbekistan, 3National University Uzbekistan named after MIRZO ULUGBEK, Almazar, university st., 4, Tashkent 100174, Uzbekistan, 4Institute of Bioorganic Chemistry AS of Uzbekistan, 83 Mirzo Ulugbek str, Tashkent 700125, Uzbekistan

Abstract. Background. Modern science of Uzbekistan has a tendency to establish a close cooperation with real sectors of the economy. Such cooperation is particularly important for agriculture. Nowadays when because of an ecological situation and climate changes productivity of agricultural plants is gradually decreased it is essential to suggest new fertilizers and growth stimulators. Our group is conducting a systematic research in order to elaborate stimulators on the base of metal complexes. We are using well known auxin 2,4-dichlorophenoxyacetate (2,4-D) for preparation of the new coordination compounds.

Purpose. The purpose of the current investigation is to obtain metal complex containing 2,4-D and also effective plant growth agent MEA with further determination the structure of the synthesized compound.

Methodology. X-ray crystallography at room temperature using an Xcalibur R Oxford Diffraction automated diffractometer was main structure determination method. 

Originality. The supramolecular complex has been obtained and its crystal structure and molecular characteristics have been determined for the first time.

Findings. A novel supramolecular compound with a participation of the 2,4-dichlorophenoxyacetate (2,4-D) complex molecule [Ni(2,4-D)2(H2O)4], free 2,4-D ligand, monoethanolamine (MEA) and crystallization water molecules has been synthesized.  The structure of the synthesized complex is determined by the single-crystal X-ray diffraction method as {2[Ni(2,4-D)2(H2O)4]•(MEA)•2(2,4-D)•4H2O}. The crystal structure of the supramolecular complex {2[Ni(2,4-D)2(H2O)4]•(MEA)•2(2,4-D)•3H2O} is complicated. Besides coordination to metal atom two 2,4-D ligand molecules occupy outer coordination sphere. One MEA molecule is displaced from inner sphere despite of its high chelating capability. In order to associate these three components by H-bonds 4 water molecules participate in the crystal structure. In result of complicated system of intermolecular H-bons 3-D supramolecular network is formed.

Keywords: Supramolecular complex, 2,4-D ligand, MEA, crystal structure, H-bond.


- The novel compound has been prepared in the form of supramolecular complex consisting of four components.


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2. Yaling Song. Insight into the mode of action of 2,4-dichlorophenoxyacetic acid (2,4-D) as an herbicide. J. Integrative Plant Biology, 2013,, www.wileyonlinelib journal/jipb. 

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4. Zardini, Hadi Zare; Davarpanah, Morteza; Shanbedi, Mehdi; Amiri, Ahmad; Maghrebi, Morteza; Ebrahimi, Leila. Microbial toxicity of ethanolamines-Multiwalled carbon nanotubes// Journal of Biomedical Materials Research Part A.-2014.-102(6).-1774–1781, doi:10.1002/jbm.a.34846.

5. Moussa Helal Ragab; El-Sayed Mohamed Selem, Eman; Ghramh. Hamed Ali. Ethanolamine affects physiological responses of salt-treated jute plants//International Journal of Vegetable Science, -2019.-1–9. doi:10.1080/19315260.2019.1566187.

6. Liang Han; Jian-Rong Gao; Zheng-Ming Li; Yun Zhang; Wei-Ming Guo. Synthesis of new plant growth regulator: N-(Fatty acid) O-aryloxyacetyl ethanolamine// Bioorganic & Medicinal Chemistry Letters.-2007.-17(11).-3231–3234. doi:10.1016/ j.bmcl.2007.03.013.

7. A.B. Ibragimov, Zh. M. Ashurov, A. B. Ibragimov, Zh. Zh. Tashpulatov. Synthesis, Structure, and Fungicidal Activity of Mono- and Binuclear Mixed-Ligand Copper Complex with p-Nitrobenzoic Acid and Monoethanolamine// Russian Journal of Coordination Chemistry.-2017.-43(6).-380–388.

8. Xcalibur. Oxford Difraction Ltd. CrysAlisPro. Version., 2009.

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To cite this article: B. KH.  Alimnazarov, A. B. Ibragimov, D. I. Abduvakhidov, A. S. Normamatov, J. M. Ashurov, B. T. Ibragimov. Synthesis, crystal structure and hirschfeld surface analysis of the supramole-cular complex on the base of [Ni(2,4-DICHLORO- PHENOXYACETATE)2(H2O)4], 2-4-dichlorophenoxyacetate and monoethanolamine // Uzbek chemical journal. -2021. - Nr4. - Pp.66-72. 

Received: 16.08.2021; Accepted: 10.09.2021; Published: 10.09.2021


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UDK 547,596:615.291

1Kh. T. Saydullaeva, 1,2R. S. Esanov, 1M. B. Gafurov, 1Sh. I. Dalimov, 1,2Kh. A. Yuldashev


1Institute of Bioorganic Chemistry AS of Uzbekistan, 2 National University Uzbekistan, E-mail:

Abstract. Background. Demographic indicators of the population, as well as the demand for food and agricultural products, are growing day by day, which in turn requires large-scale cultivation of high-quality agricultural products. The role of phytohormones in the cultivation of high-quality agricultural crops and their high yields is great. Today all phytohormones are imported.

Purpose of work. Obtaining supmolecular complexes of some phytohormones hardly soluble in water with glycyrrhizic acid and studying their structure using optical spectroscopy.

Methodology. From technical glycyrrhizic acid, the triammonium salt of GA was obtained, then the monoammonium salt of glycyrrhizic acid (MASGA) was obtained from it, then GA was obtained by acid hydrolysis of MASGA. Supramolecular complexes of GA with phytohormones: 3-indolylbutyric acid (IBA) and 6-benzylaminopurine (BAP) in a ratio of 2: 1, 5: 1, 9: 1 were obtained. Infrared (IR) spectra of the obtained substances were obtained on a Perkin Elmer-10.6.1 spectrometer (USA) in the range of vibrations of 400–4000 cm-1, and ultraviolet (UV) spectra were obtained on a Shimadzu 12.80 spectrophotometer (Japan).

Originality. For the first time supramolecular complexes of GA with some phytohormones have been obtained, some physico-chemical constants have been determined and their structure has been studied.

Findings. Supramolecular complexes of GA with phytohormones - IBA and BAP in various ratios were obtained by a known method. Some of their physicochemical constants have been determined. By comparing the UV and IR spectra of the starting compounds and complexes, conclusions are drawn about the interactions due to which the complexes are formed.

Key words: glycyrrhizic acid, supramolecular complex, phytohormone, 3-indolylbutyric acid, 6-benzylaminopurine.


- molecular complexes of phytohormones (IBA, BAP) obtained with GA;

- spectral properties (UV, IR) of the obtained complexes were studied.


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To cite this article: Kh. T. Saydullaeva, R. S. Esanov, M. B. Gafurov, Sh. I. Dalimov, Kh. A. Yuldashev. Obtaining complexes of certain phytohormones with glycirrizic acid  // Uzbek chemical journal. -2021. - Nr4. - Pp.73-78. 

Received: 16.08.2021; Accepted: 30.08.2021; Published: 10.09.2021


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UDK 543.422.;546.817

1О. А. Ermatova,  2S. Т. Yo’chieva, 2D. А. Gafurova, 2Z. А. Smanova


1Gulistan State University, 2National University Uzbekistan

Abstract. Background. The main sources of anthropogenic influx of heavy metals, in particular lead, into the environment are various industrial enterprises, the burning of oil and various wastes, the production of glass, cement, vehicle exhaust gases, etc. Analytical monitoring of the content of lead ions in various objects is relevant, since lead is one of the most toxic and hazardous environmental pollutants.

Purpous: to develop a sorption-spectrophotometric technique for the determination of lead ions with an immobilized reagent sulphorsazene on a polymer material.

Methodology. Methods of reflection spectrophotometry, as well as sorption-spectrophotometric methods were used. The optimal conditions for immobilization and complexation were studied depending on time, environment, temperature and other factors.

Originality. A technique was developed for the sorption-spectrophotometric determination of lead ions using immobilized sulphorsazene on a polymer fiber, which made it possible to improve the analytical and metrological parameters of the method for its determination.

Findings. The optimal conditions for the immobilization and complexation of lead (II) ions with immobilized sulphorsazene on a fibrous sorbent were determined, and when studying the effect of pH on the sorption of lead (II) ions, it was found that the sorbent quantitatively extracts lead (II) up to 90% in the pH range from 3.0-6.0.

Key words: analytical reagent, sulphorsazene, immobilization, sorption spectroscopy, sorption, lead (II) ions.


- research in the field of using the immobilized reagent in real objects;

- concentration, separation and determination of lead ions by immobilized reagents.


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To cite this article: О. А. Ermatova,  S. Т. Yo’chieva, D. А. Gafurova, Z. А. Smanova. Development of a sorption-spectroscopic method for determination of lead ions with immobilized sulfarsarzene  // Uzbek chemical journal. -2021. - Nr4. - Pp.79-86. 

Received: 15.07.2021; Accepted: 20.08.2021; Published: 10.09.2021


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