PURIFICATION OF PRODUCED WATER AFTER MINING
Zhalgasuly N. Ismailova A.A. Bektibayev U.A. Zhumagulov T.Z.
2024National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2024#2024Issue 195 - 110 pp.
The article presents the results of research on the purification of reservoir waters after underground borehole leaching of uranium and other minerals, and also studied the chemical, mineralogical and sorption properties of brown coal, sodium humate, benthic clay, shungite-containing aluminosilicates. According to the IAEAs data on uranium reserves in the subsurface, Kazakhstan shares the world championship with Australia. Moreover, 75.3 % of the republics uranium reserves are concentrated in deposits belonging to the formation-infiltration type, located in the largest Shu-Sarys province on the Eurasian continent and suitable for mining by the method of underground borehole leaching (UBL). UL, which originated as an idea in the 50s of the twentieth century in the United States, is currently a recognized method of uranium mining. Since 1988, uranium has been mined in the Republic of Kazakhstan by this method. Laboratory studies conducted at the D. A. Kunaev. Institute of Mining on water purification from heavy metals have shown that natural materials such as bentonite clay, as well as derivatives. Intensive development of uranium deposits in Kazakhstan and an increase in production volumes in the next 15–20 years by the UBL method creates a problem of contamination of groundwater and surface waters with heavy metal ions and radionuclides. In acidic residual solutions, the pH reaches 1.5–3.0, sulfates, chlorides, nitrates accumulate, the concentration of which is 6–10 times higher than the maximum permissible concentration (UBL) in drinking water, the concentration of aluminum and iron ions exceeds 3.0-5.0 times, lead and cobalt 30-50 times, and manganese 1,700 times.
clay , minerals , mining , shungite , water purification
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Department Ecology and Safety of Mining D.A. Kunaev, Institute of Mining, av. Abay, 191, Almaty, Kazakhstan
Laboratory Physico-chemical methods of processing of mineral raw materials D.A. Kunaev, Institute of the Mining, Abay av., 191, Almaty city, Kazakhstan
Laboratory Physical and chemical methods of processing of mineral raw materials, D.A. Kunaev, Institute of Mining, Almaty, Kazakhstan
OP Engineering Technologies of the Korkyt Ata Kyzylorda University, A. Utegenov, 27, Kyzylorda city, Kazakhstan
Department Ecology and Safety of Mining D.A. Kunaev
Laboratory Physico-chemical methods of processing of mineral raw materials D.A. Kunaev
Laboratory Physical and chemical methods of processing of mineral raw materials
OP Engineering Technologies of the Korkyt Ata Kyzylorda University
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