2411-3336 2541-9404 Записки Горного института Journal of Mining Institute Санкт-Петербургский горный университет императрицы Екатерины ΙΙ Empress Catherine II Saint Petersburg Mining University CVUHNQ pmi-16049 https://pmi.spmi.ru/pmi/article/view/16049 Геотехнология и инженерная геология Geotechnical Engineering and Engineering Geology Study of the properties and action of polyelectrolytes in the treatment of the dressing plant’s discharges Исследование свойств и действия полиэлектролитов при очистке сливов обогатительной фабрики Mitrofanova Galina V. Митрофанова Г. В. Mitrofanova Galina V. g.mitrofanova@ksc.ru 0000-0003-1230-5381 Горный институт КНЦ РАН (Россия) Mining Institute of Kola Science Center of the RAS (Russia) Chernousenko Elena V. Черноусенко Е. В. Chernousenko Elena V. g.mitrofanova@ksc.ru 0000-0003-4266-9418 Горный институт КНЦ РАН (Россия) Mining Institute of Kola Science Center of the RAS (Russia) Artemev Aleksandr V. Артемьев А. В. Artemev Aleksandr V. g.mitrofanova@ksc.ru 0000-0002-9833-3350 Горный институт КНЦ РАН (Россия) Mining Institute of Kola Science Center of the RAS (Russia) Pospelova Yuliya P. Поспелова Ю. П. Pospelova Yuliya P. g.mitrofanova@ksc.ru 0009-0001-3286-4511 Горный институт КНЦ РАН (Россия) Mining Institute of Kola Science Center of the RAS (Russia) Smirnova Natalya A. Смирнова Н. А. Smirnova Natalya A. g.mitrofanova@ksc.ru 0000-0003-4537-3890 АО «Ковдорский ГОК» (Россия) AO Kovdorsky GOK (Russia) Barmin Igor S. Бармин И. С. Barmin Igor S. g.mitrofanova@ksc.ru 0000-0001-7596-5825 АО «МХК «Еврохим» (Россия) AO Mineral and Chemical Company EuroChem (Russia) 04 07 2023 2024 265 95 103 31 10 2022 21 04 2023 29 02 2024 © Galina V. Mitrofanova, Elena V. Chernousenko, Aleksandr V. Artemev, Yuliya P. Pospelova, Natalya A. Smirnova, Igor S. Barmin 2023 Г. В. Митрофанова, Е. В. Черноусенко, А. В. Артемьев, Ю. П. Поспелова, Н. А. Смирнова, И. С. Бармин Galina V. Mitrofanova, Elena V. Chernousenko, Aleksandr V. Artemev, Yuliya P. Pospelova, Natalya A. Smirnova, Igor S. Barmin CC BY 4.0 https://pmi.spmi.ru/pmi/article/view/16049

Организация внутрифабричного водооборота на горно-перерабатывающих предприятиях, когда отходы и сливы производства не направляются во внешнее хвостохранилище, представляет собой актуальную экологическую и экономическую задачу. Возврат даже части воды в технологический процесс после предварительной очистки значительно сократит объем загрязненных вод, сбрасываемых в хвостохранилища, что позволит снизить энергозатраты на транспортировку отходов и негативный эффект на окружающую среду. Одним из отходов, направляемых в хвостохранилище при обогащении руды Ковдорского месторождения, является слив сгустителей подготовки питания апатитовой флотации. С целью выбора эффективного режима очистки слива проведена оценка действия полиакриламидных флокулянтов. Показано, что с частицами апатита и кальцита более эффективно взаимодействует анионный флокулянт. Это определяет его преимущество при очистке от взвешенных частиц. Проведена необходимая оценка влияния остаточной концентрации флокулянта на процесс апатитовой флотации, куда попадет часть возвращаемой очищенной воды. По сравнению с флотацией на оборотной воде наблюдается снижение извлечения Р2О5 в равный по качеству апатитовый концентрат. Для получения требуемых показателей обогащения на очищенной воде необходима корректировка расходов собирателя (жирных кислот таллового масла) и депрессора (жидкого стекла).

The organization of intrafactory water circulation at mining and processing enterprises, when production wastes and discharges are not sent to an external tailings dump, is an urgent environmental and economic task. Returning even a part of water into the technological process after preliminary treatment will significantly reduce the volume of polluted water discharged into tailings, which will reduce energy costs for waste transportation and the negative environmental impact. One of the wastes sent to the tailings during the ore dressing wastes from the Kovdor deposit to the tailings dump is the discharge of thickeners for the preparation of apatite flotation feed. In order to choose the effective discharge cleaning regime, the authors have evaluated the action of polyacrylamide flocculants. It has been discovered that the apatite and calcite particles interact more effectively with the anionic flocculant. This fact determines its advantage for the treatment of suspended particles. The influence of the residual concentration of a flocculant on the apatite flotation, where a part of the returned treated water goes, has been assessed. Compared to flotation with recycled water, there is a decrease of P2O5 extraction into apatite concentrate of equal quality. In order to obtain the required enrichment indicators on the treated water, it is necessary to adjust the collector (tall oil fatty acids) and depressor (liquid glass) costs.

 Ключевые слова флотация апатита Ковдорское месторождение внутренний водооборот полиакриламидные флокулянты водоподготовка Keywords apatite flotation the Kovdor deposit internal water circulation polyacrylamide flocculants water preparation Кареев Н.Н., Суханов Г.С. Пути оптимизации решений по обогатительным фабрикам и сооружениям внутрифабричного водооборота // Водоочистка. 2022. № 1. С. 16-22. Kareev N.N., Sukhanov G.S. Methods to optimize solutions for dressing plants and intrafactory water rotation facilities. Vodoochistka. 2022. N 1, p. 16-22 (in Russian). Чантурия В.А. Научное обоснование и разработка инновационных процессов комплексной переработки минерального сырья // Горный журнал. 2017. № 11. С. 7-13. DOI: 10.17580/gzh.2017.11.01 Chanturia V.A. Scientific substantiation and development of innovative approaches to integrated mineral processing. Gornyi Zhurnal. 2017. N 11, p. 7-13 (in Russian). DOI: 10.17580/gzh.2017.11.01 Невская М.А., Селезнев С.Г., Маслобоев В.А. и др. Геоэкологические и организационно-экономические проблемы переработки горнопромышленных отходов в Российской Федерации // Вестник Кольского научного центра РАН. 2020. Т. 12. № 1. С. 11-25. DOI: 10.37614/2307-5228.2020.12.1.002 Nevskaya М.А., SeleznevS.G., MasloboevV.A. etal. Geoecological and business problems of mining and mineral processing waste in the Russian Federation. Herald of Kola Science Centre of the RAS. 2020. Vol. 12. N 1, p. 11-25 (in Russian). DOI: 10.37614/2307-5228.2020.12.1.002 McPhail G.I., Ugaz R., Garcia F. Practical tailings slurry dewatering and tailings management strategies for small and medium mines // Proceedings of the 22nd International Conference on Paste, Thickened and Filtered Tailings. Perth: Australian Centre for Geomechanics, 2019. P. 235-243. DOI: 10.36487/ACG_rep/1910_15_McPhail McPhail G.I., Ugaz R., Garcia F. Practical tailings slurry dewatering and tailings management strategies for small and medium mines. Proceedings of the 22nd International Conference on Paste, Thickened and Filtered Tailings. Perth: Australian Centre for Geomechanics, 2019, p. 235-243. DOI: 10.36487/ACG_rep/1910_15_McPhail Witecki K., Polowczyk I., Kowalczuk P.B. Chemistry of wastewater circuits in mineral processing industry – A review // Journal of Water Process Engineering. 2022. Vol. 45. № 102509. DOI: 10.1016/j.jwpe.2021.102509 Witecki K., Polowczyk I., Kowalczuk P.B. Chemistry of wastewater circuits in mineral processing industry – A review. Journal of Water Process Engineering. 2022. Vol. 45. N 102509. DOI: 10.1016/j.jwpe.2021.102509 Бауман А.В. Проблемные вопросы проектирования схем сгущения и водооборота обогатительных фабрик // Обогащение руд. 2016. № 3. С. 58-62. DOI: 10.17580/or.2016.03.10 Bauman A.V. Concentrating plants thickening circuits and return water systems design problem areas. ObogashchenieRud. 2016. N 3, p. 58-62 (in Russian). DOI: 10.17580/or.2016.03.10 Shangyong Lin, Runqing Liu, Meirong Wu et al. Minimizing beneficiation wastewater through internal reuse of process water in flotation circuit // Journal of Cleaner Production. 2020. Vol. 245. № 118898. DOI: 10.1016/j.jclepro.2019.118898 Shangyong Lin, Runqing Liu, Meirong Wu et al. Minimizing beneficiation wastewater through internal reuse of process water in flotation circuit. Journal of Cleaner Production. 2020. Vol. 245. N 118898. DOI: 10.1016/j.jclepro.2019.118898 Muzinda I., Schreithofer N. Water quality effects on flotation: Impacts and control of residual xanthates // Minerals Engineering. 2018. Vol. 125. P. 34-41. DOI: 10.1016/j.mineng.2018.03.032 Muzinda I., Schreithofer N. Water quality effects on flotation: Impacts and control of residual xanthates. Minerals Engineering. 2018. Vol. 125, p. 34-41. DOI: 10.1016/j.mineng.2018.03.032 Jianhua Kang, Chen Chen, Wei Sun et al. A significant improvement of scheelite recovery using recycled flotation wastewater treated by hydrometallurgical waste acid // Journal of Cleaner Production. 2017. Vol. 151. P. 419-426. DOI: 10.1016/j.jclepro.2017.03.073 Jianhua Kang, Chen Chen, Wei Sun et al. A significant improvement of scheelite recovery using recycled flotation wastewater treated by hydrometallurgical waste acid. Journal of Cleaner Production. 2017. Vol. 151, p. 419-426. DOI: 10.1016/j.jclepro.2017.03.073 Pestriak I., Morozov V., Otchir E. Modelling and development of recycled water conditioning of copper-molybdenum ores processing // International Journal of Mining Science and Technology. 2019. Vol. 29. Iss. 2. P. 313-317. DOI: 10.1016/j.ijmst.2018.11.028 Pestriak I., Morozov V., Otchir E. Modelling and development of recycled water conditioning of copper-molybdenum ores processing. International Journal of Mining Science and Technology. 2019. Vol. 29. Iss. 2, p. 313-317. DOI: 10.1016/j.ijmst.2018.11.028 Jóźwiakowski K., Marzec M., Fiedurek J. et al. Application of H2O2 to optimize ammonium removal from domestic wastewater // Separation and Purification Technology. 2017. Vol. 173. P. 357-363. DOI: 10.1016/j.seppur.2016.08.047 Jóźwiakowski K., Marzec M., Fiedurek J. et al. Application of H2O2 to optimize ammonium removal from domestic wastewater. Separation and Purification Technology. 2017. Vol. 173, p. 357-363. DOI: 10.1016/j.seppur.2016.08.047 Xiangsong Meng, Khoso S.A., Jiangqiu Wu et al. Efficient COD reduction from sulfide minerals processing wastewater using Fenton process // Minerals Engineering. 2019. Vol. 132. P. 110-112. DOI: 10.1016/j.mineng.2018.11.054 Xiangsong Meng, Khoso S.A., Jiangqiu Wu et al. Efficient COD reduction from sulfide minerals processing wastewater using Fenton process. Minerals Engineering. 2019. Vol. 132, p. 110-112. DOI: 10.1016/j.mineng.2018.11.054 Khazaie A., Mazarji M., Samali B. et al. A Review on Coagulation/Flocculation in Dewatering of Coal Slurry // Water. 2022. Vol. 14. Iss. 6. № 918. DOI: 10.3390/w14060918 Khazaie A., Mazarji M., Samali B. et al. A Review on Coagulation/Flocculation in Dewatering of Coal Slurry. Water. 2022. Vol. 14. Iss. 6. N 918. DOI: 10.3390/w14060918 Zhongfan Zhu, Xiangzhong Xiong, Chaohuang Liang, Ming Zhao. On the flocculation and settling characteristics of low- and high-concentration sediment suspensions: effects of particle concentration and salinity conditions // Environmental Science and Pollution Research. 2018. Vol. 25. Iss. 14. P. 14226-14243. DOI: 10.1007/s11356-018-1668-0 Zhongfan Zhu, Xiangzhong Xiong, Chaohuang Liang, Ming Zhao. On the flocculation and settling characteristics of low- and high-concentration sediment suspensions: effects of particle concentration and salinity conditions. Environmental Science and Pollution Research. 2018. Vol. 25. Iss. 14, p. 14226-14243. DOI: 10.1007/s11356-018-1668-0 Шачнева Е.Ю. Применение флокулянтов серии АК-631 для флокуляционной очистки сточных вод промышленных предприятий // Вода и экология: проблемы и решения. 2017. № 4. С. 62-70. DOI: 10.23968/2305-3488.2017.22.4.62-71 Shachneva E.Yu. Application of AK-631 Floculants for Floculating Cleaning of Sewage Water of Industrial Enterprises. Water and Ecology: Problems and Solutions. 2017. N 4, p. 62-70 (in Russian). DOI: 10.23968/2305-3488.2017.22.4.62-71 Jin Park, Young-Soo Han, Sang-Woo Ji. Investigation of Mineral-Processing. Wastewater Recycling Processes: A Pilot Study // Sustainability. 2018. Vol. 10. Iss. 9. № 3069. DOI: 10.3390/su10093069 Jin Park, Young-Soo Han, Sang-Woo Ji. Investigation of Mineral-Processing. Wastewater Recycling Processes: A Pilot Study. Sustainability. 2018. Vol. 10. Iss. 9. N 3069. DOI: 10.3390/su10093069 Саламатов О.В., Саламатов В.И. О влиянии флокулянтов на кинетику процессов обезвоживания и промывки красных шламов из низкокремнистых бокситов при производстве глинозема // Вестник Иркутского государственного технического университета. 2019. Т. 23. № 2. С. 404-414. DOI: 10.21285/1814-3520-2019-2-404-414 Salamatov O.V., Salamatov V.I. To flocculant effect on the kinetics of dewatering and washing processes of red muds from low silicon bauxites in alumina production. Proceedings of Irkutsk State Technical University. 2019. Vol. 23. N 2, p. 404-414 (in Russian). DOI: 10.21285/1814-3520-2019-2-404-414 Tengfa Long, Xi Liu, Chenbing Ai et al. Treatment technique for wastewater from bauxite flotation and an application for its reuse // Journal of Cleaner Production. 2022. Vol. 335. № 130321. DOI: 10.1016/j.jclepro.2021.130321 Tengfa Long, Xi Liu, Chenbing Ai et al. Treatment technique for wastewater from bauxite flotation and an application for its reuse. Journal of Cleaner Production. 2022. Vol. 335. N 130321. DOI: 10.1016/j.jclepro.2021.130321 Santos M.A., Capponi F., Ataíde C.H., Barrozo M.A.S. Wastewater treatment using DAF for process water reuse in apatite flotation // Journal of Cleaner Production. 2021. Vol. 308. № 127285. DOI: 10.1016/j.jclepro.2021.127285 Santos M.A., Capponi F., Ataíde C.H., Barrozo M.A.S. Wastewater treatment using DAF for process water reuse in apatite flotation. Journal of Cleaner Production. 2021. Vol. 308. N 127285. DOI: 10.1016/j.jclepro.2021.127285 Bahmani-Ghaedi A., Hassanzadeh A., Sam A., Entezari-Zarandi A. The effect of residual flocculants in the circulating water on dewatering of Gol-e-Gohar iron ore // Minerals Engineering. 2022. Vol. 179. № 107440. DOI: 10.1016/j.mineng.2022.107440 Bahmani-Ghaedi A., Hassanzadeh A., Sam A., Entezari-Zarandi A. The effect of residual flocculants in the circulating water on dewatering of Gol-e-Gohar iron ore. Minerals Engineering. 2022. Vol. 179. N 107440. DOI: 10.1016/j.mineng.2022.107440 Eskanlou A., Qingqing Huang. Phosphatic waste clay: Origin, composition, physicochemical properties, challenges, values and possible remedies – A review // Minerals Engineering. 2021. Vol. 162. № 106745. DOI: 10.1016/j.mineng.2020.106745 Eskanlou A., Qingqing Huang. Phosphatic waste clay: Origin, composition, physicochemical properties, challenges, values and possible remedies – A review. Minerals Engineering. 2021. Vol. 162. N 106745. DOI: 10.1016/j.mineng.2020.106745 Shashikant K., Santosh A., Sandeep C. et al. Revisiting Zeta Potential, the Key Feature of Interfacial Phenomena, with Applications and Recent Advancements // ChemistrySelect. 2022. Vol. 7. Iss. 1. № e202103084. P. 1-40. DOI: 10.1002/slct.202103084 Shashikant K., Santosh A., Sandeep C. et al. Revisiting Zeta Potential, the Key Feature of Interfacial Phenomena, with Applications and Recent Advancements. Chemistry Select. 2022. Vol. 7. Iss. 1. N e202103084, p. 1-40. DOI: 10.1002/slct.202103084 Owens C.L., Nash G.R., Hadler K. et al. Apatite enrichment by rare earth elements: A review of the effects of surface properties // Advances in Colloid and Interface Science. 2019. Vol. 265. P. 14-28. DOI: 10.1016/j.cis.2019.01.004 Owens C.L., Nash G.R., Hadler K. et al. Apatite enrichment by rare earth elements: A review of the effects of surface properties. Advances in Colloid and Interface Science. 2019. Vol. 265, p. 14-28. DOI: 10.1016/j.cis.2019.01.004 Fang Zhou, Louxiang Wang, Zhenghe Xu et al. Role of reactive oily bubble in apatite flotation // Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2017. Vol. 513. P. 11-19. DOI: 10.1016/j.colsurfa.2016.11.024 Fang Zhou, Louxiang Wang, Zhenghe Xu et al. Role of reactive oily bubble in apatite flotation. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2017. Vol. 513, p. 11-19. DOI: 10.1016/j.colsurfa.2016.11.024 Mahrouqi D.A., Vinogradov J., Jackson, M.D. Zeta potential of artificial and natural calcite in aqueous solution // Advances in Colloid and Interface Science. 2017. Vol. 240. P. 60-76. DOI: 10.1016/j.cis.2016.12.006 Mahrouqi D.A., Vinogradov J., Jackson M.D. Zeta potential of artificial and natural calcite in aqueous solution. Advances in Colloid and Interface Science. 2017. Vol. 240, p. 60-76. DOI: 10.1016/j.cis.2016.12.006 Bonto M., Eftekhari A.A., Nick H.M. Electrokinetic behavior of artificial and natural calcites: A review of experimental measurements and surface complexation models // Advances in Colloid and Interface Science. 2022. Vol. 301. № 102600. DOI: 10.1016/j.cis.2022.102600 Bonto M., Eftekhari A.A., Nick H.M. Electrokinetic behavior of artificial and natural calcites: A review of experimental measurements and surface complexation models. Advances in Colloid and Interface Science. 2022. Vol. 301. N 102600. DOI: 10.1016/j.cis.2022.102600 Shuai Li, Leroy P., Heberling, F. et al. Influence of surface conductivity on the apparent zeta potential of calcite // Journal of Colloid and Interface Science. 2016. Vol. 468. P. 262-275. DOI: 10.1016/j.jcis.2016.01.075 Shuai Li, Leroy P., Heberling F. et al. Influence of surface conductivity on the apparent zeta potential of calcite. Journal of Colloid and Interface Science. 2016. Vol. 468, p. 262-275. DOI: 10.1016/j.jcis.2016.01.075 Yaoyang Ruan, Zeqiang Zhang, Huihua Luo et al. Effects of Metal Ions on the Flotation of Apatite, Dolomite and Quartz // Minerals. 2018. Vol. 8. Iss. 4. № 141. DOI: 10.3390/min8040141 Yaoyang Ruan, Zeqiang Zhang, Huihua Luo et al. Effects of Metal Ions on the Flotation of Apatite, Dolomite and Quartz. Minerals. 2018. Vol. 8. Iss. 4. N 141. DOI: 10.3390/min8040141 Fang Zhou, Qi Liu, Xu Liu et al. Surface Electrical Behaviors of Apatite, Dolomite, Quartz, and Phosphate Ore // Frontiers in Materials. 2020. Vol. 7. № 35. DOI: 10.3389/fmats.2020.00035 Fang Zhou, Qi Liu, Xu Liu et al. Surface Electrical Behaviors of Apatite, Dolomite, Quartz, and Phosphate Ore.Frontiers in Materials. 2020. Vol. 7. N 35. DOI: 10.3389/fmats.2020.00035 Артемьев А.В., Митрофанова Г.В. Использование анионного флокулянта в процессе подготовки оборотной воды для флотации апатит-нефелиновых руд // Вестник Мурманского государственного технического университета. 2020. Т. 23. № 2. С. 150-159. DOI: 10.21443/1560-9278-2020-23-2-150-159 Artemiev A.V., Mitrofanova G.V. The use of anionic flocculant in water treatment for flotation of apatite-nepheline ores. Vestnik of Murmansk State Technical University. 2020. Vol. 23. N 2, p. 150-159 (in Russian). DOI: 10.21443/1560-9278-2020-23-2-150-159 Wiśniewska M. The temperature effect on the adsorption mechanism of polyacrylamide on the silica surface and its stability // Applied Surface Science. 2012. Vol. 258. Iss. 7. P. 3094-3101. DOI: 10.1016/j.apsusc.2011.11.044 Wiśniewska M. The temperature effect on the adsorption mechanism of polyacrylamide on the silica surface and its stability. Applied Surface Science. 2012. Vol. 258. Iss. 7, p. 3094-3101. DOI: 10.1016/j.apsusc.2011.11.044 Гарафутдинова М.А., Колобов Ю.Р., Гребцова Е.А., Колобова Е.Г. Электрокинетические характеристики нативного и кремний-замещенного гидроксиапатита // Научные ведомости Белгородского государственного университета. 2012. № 23 (142). С. 117-121. Garafutdinova M.A., Kolobov Yu.R., Grebtsova E.A., Kolobova E.G. Electrokinetic Characteristics of the Native and Silicon-Substituted Hydroxyapatite. Belgorod State University Scientific Bulletin. 2012. N 23 (142), p. 117-121 (in Russian). Skwarek E., Janusz W. The Influence of Carbonate Ions on the Structure of the Electrical Double Layer at the Interface of Hydroxyapatite/Electrolyte Solution // Materials Science. 2016. Vol. 22. № 2. P. 174-178. DOI: 10.5755/j01.ms.22.2.7817 Skwarek E., Janusz W. The Influence of Carbonate Ions on the Structure of the Electrical Double Layer at the Interface of Hydroxyapatite/Electrolyte Solution. Materials Science. 2016. Vol. 22. N 2, p. 174-178. DOI: 10.5755/j01.ms.22.2.7817 Nduwa-Mushidi J., Anderson C.G. Surface Chemistry and Flotation Behaviors of Monazite–Apatite–Ilmenite–Quartz–Rutile–Zircon with Octanohydroxamic Acid // Journal of Sustainable Metallurgy. 2017. Vol. 3. Iss. 1. P. 62-72. DOI: 10.1007/s40831-016-0114-0 Nduwa-Mushidi J., Anderson C.G. Surface Chemistry and Flotation Behaviors of Monazite–Apatite–Ilmenite– –Quartz–Rutile–Zircon with Octanohydroxamic Acid. Journal of Sustainable Metallurgy. 2017. Vol. 3. Iss. 1, p. 62-72.DOI: 10.1007/s40831-016-0114-0 Žuržul N., Ilseng A., Prot V.E. et al. Contribution and Specific Ion Effects in Swelling of Cationic Hydrogels are Additive: Combined High-Resolution Experiments and Finite Element Modeling // Gels. 2020. Vol. 6. Iss. 3. № 31. DOI: 10.3390/gels6030031 Žuržul N., Ilseng A., Prot V.E. et al. Contribution and Specific Ion Effects in Swelling of Cationic Hydrogels are Additive: Combined High-Resolution Experiments and Finite Element Modeling. Gels. 2020. Vol. 6. Iss. 3. N 31. DOI: 10.3390/gels6030031 Липин В.А., Евдокимов А.Н., Суставова Т.А., Петрова Ю.А. Синтетические полиамфолитные гидрогели на основе различных алифатических диаминов для удаления красителей из водных растворов // Вестник Тверского государственного университета. Серия «Химия». 2020. № 4 (42). С. 149-158. DOI: 10.26456/vtchem2020.4.17 Lipin V.A., Evdokimov A.N., Sustavova T.A., Petrova Yu.A. Synthetic Polyampholyte Hydrogels Based on Various Aliphatic Diamins for Removing Dyes from Aqueous Solutions. Bulletin of the Tver State University. Series: Chemistry. 2020. N 4 (42), p. 149-158 (in Russian). DOI: 10.26456/vtchem2020.4.17