Preparation of adsorbents for the extraction of heavy metals from mining wastewater

被引：0

作者：

Mirzaeva, Elena I. ^{[1
]}

Isaeva, Nurkhon F. ^{[2
]}

Yalgashev, Elmurod Ya. ^{[3
]}

Turdiyeva, Dilnoza P. ^{[4
]}

Boymonov, Rufatjon M. ^{[5
]}

机构：

[1] Department of Metallurgy, National University of Science, Technology MISIS (Almalyk Branch), Almalyk

[2] Tashkent Research Institute of Chemical Technology, Tashkent

[3] Tashkent Institute of Chemical Technology, Tashkent

[4] Mirzo Ulugbek National University of Uzbekistan, Tashkent

[5] Department of Machinery and Equipment of Oil and Gas Industry and Pipeline Transport Systems, Islam Karimov Tashkent State Technical University, Tashkent

来源：

Mining Science and Technology (Russian Federation) | 2025年 / 10卷 / 01期

关键词：

adsorption; aluminosilicates; bentonites; crystallization; diffractogram; ecology; heavy metals; kaolin; ore; processing; treatment; wastewater; zeolites;

D O I：

10.17073/2500-0632-2024-02-224

中图分类号：

学科分类号：

摘要：

Mining and metallurgical operations are inextricably connected with the consumption of large volumes of water and, consequently, the generation of liquid waste. The priority is to solve the problems of treatment and rational reclaiming of process waters with high content of valuable components. This will make it possible to obtain a significant environmental and economic effect, i.e. to bring profit directly to enterprises, save material resources and reduce the environmental impact in mining regions. Processing of copper-zinc ores is accompanied by the formation of metal-bearing wastewater with a wide range of associated metals and nonmetals with low concentrations of each individual component and pH fluctuations within wide ranges. These factors make it difficult to select a rational treatment technology, so enterprises have to pay for excessive metal-bearing discharges into the environment. Heavy metals are toxic, do not undergo decomposition, can be accumulated by aquatic plants and reach a human body through the food chain. Centralized accumulation of accidental discharges, surface and drainage water with subsequent treatment for use in recycled water supply can solve a number of environmental problems in the field of water resources protection. Adsorption of heavy metals by zeolites produced from inexpensive clay minerals due to the simplicity of the process, possibility of zeolite regeneration, high efficiency in Cu2+, Zn2+ and Fe2+ ion exchange with release of non-toxic Na+ cations into the environment is a good alternative to chemical precipitation. The purpose of this study is to optimize the conditions for producing zeolites from kaolin and bentonite with the assessment of the possibility of their use for the treatment of wastewater generated during mining and processing of ores from sulfide copper-polymetallic deposits. The technology of alkaline fusion of bentonite or kaolin with sodium hydroxide was used as a basis for zeolite synthesis from crude mining products. The novelty of the technological approach in obtaining zeolites from natural aluminosilicates in comparison with the published data is that the adjustment of the chemical composition of alkaline alloy for the synthesis of zeolites with a certain crystal structure was carried out using Al2 O3 –NaAlО2 waste suspension. The alkaline alloy was dissolved in water, filtered, and subjected to hydrothermal crystallization. The phase composition of the zeolite adsorbents was studied. Through studying the recovery of heavy metals from model solutions, the mass composition and conditions of alkaline fusion processes as well as the hydrothermal crystallization mode were optimized. The achieved metal recovery of 95% from the model solutions with initial concentration (mg/L): 150 Cu2+, 180 Zn2+ and 125 Fe2+ allowed to draw the conclusion that zeolites based on bentonite and kaolin can be used in the treatment of metal-bearing wastewater. © Mirzaeva E. I., Isaeva N. F., Yalgashev E. Ya., Turdiyeva D. P., Boymonov R. M., 2025.

引用

页码：45 / 55

页数：10

共 30 条

[1]

Rastanina N.K., Kolobanov K.A., Impact of technogenic dust pollution from the closed mining enter-prise in the Amur Region on the ecosphere and human health, Mining Science and Technology (Russia), 6, 1, pp. 16-22, (2021)

[2]

Zvereva V.P., Frolov K.R., Lysenko A.I., Formation of mine drainage in the Far Eastern region and its impact on the ecosphere and public health, Mining Science and Technology (Russia), 7, 3, pp. 203-215, (2022)

[3]

Shadrunova I.V., Orekhova N.N., Technological and environmental and economic aspects processes for advanced recycling of water originating from mining operations, with recovery of heavy metals, Mining Informational and Analytical Bulletin, pp. 177-191, (2015)

[4]

Kataeva S.E., Shulyak E.V., Bryl V.I., Chaban N.G., On the Issue of Heavy Metal Content in the Aquatic Environment of Slavutych City, pp. 751-752, (2000)

[5]

Fayzieva M.F., On the issue of sanitary protection of reservoirs in Uzbekistan, Vestnik Nauki I Obrazovaniya, 4, pp. 70-72, (2016)

[6]

Collins F., Rozhkovskayaa A., Outramb J.G., Millarb G.J., A critical review of waste resources, synthesis, and applications for Zeolite LTA, Microporous and Mesoporous Materials, 291, (2020)

[7]

Tasic Z.Z., Bogdanovic G.D., Antonijevic M.M., Application of natural zeolite in wastewater treatment – A review, Journal of Mining and Metallurgy, 55A, 1, pp. 67-79, (2019)

[8]

Belova T.P., Ratchina T.I., Gavrilenko Y.S., Sorption of copper, nickel and cobalt by natural zeolite from aqueous solutions, Mining Informational and Analytical Bulletin, 12, pp. 76-80, (2014)

[9]

Milicevic S., Povrenovic D., Milosevic V., Martinovic S., Predicting the copper adsorption capacity on different zeolites, Journal of Mining and Metallurgy, 53A, 1, pp. 57-63, (2017)

[10]

Srilai S., Tanwongwal W., Onpecth K., Et al., Synthesis of Zeolite X from bentonite via hydrothermal method, Materials Science Forum, 990, pp. 144-148, (2020)

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