Wastes from coal mining and processing. Methodological approaches to the assessment of their ecological safety and directions for use. Part 3. Development and validation of test procedure to determine macroand micro-elements contents in coal mining, processing and combustion wastes

The regulatory framework for the assessment of the environmental impact of coal mining, processing and combustion waste in Russia are the Sanitary Regulations on Classification of Toxic Production and Consumption Waste Hazard (SP 2.1.7.1386-03) using the Tentative Water Migration Index (TWMI) as a preliminary estimate. There is no procedure to determine water-soluble elements in coal mining and processing waste in Russia, and the current coal mining, processing and combustion waste tests offer subjective estimation of hazards, which makes it impossible to compare the results of the analysis with the ones of test procedures used overseas. The experimental studies determine the optimized test conditions for water-soluble macroand micro-elements contents in coal mining, processing and combustion wastes. It is found that the best method is extracting water-soluble matters at a solid to liquid ratio of 1:50 in single cycle at room temperature and with constant stirring at a uniform rate for 3 hours. On the basis of the experimental studies of representative coals, as well as coal mining, processing and combustion waste samples, the national standard (GOST R) has been developed. This standard specifies the method for determining the yield of water-soluble matters from lignite, bituminous coal, anthracite, their mining and processing wastes, as well as from solid waste after combustion of coal and associated products (solid mineral fuel). The macroand microelement contents of water-soluble matters are estimated using the standard methods set for the analysis of natural, effluent and treated wastewaters.

Gushchina T. O., Silyutin S.A., Sokolovskaya E. E. Epshtein S.A. Wastes from coal mining and processing. Methodological approaches to the assessment of their ecological safety and directions for use. Part 3. Development and validation of test procedure to determine macroand micro-elements contents in coal mining, processing and combustion wastes. MIAB. Mining Inf. Anal. Bull. 2020;(8):145-162. [In Russ]. DOI: 10.25018/0236-1493-2020-8-0-145-162.

The study was supported by the Russian Foundation for Basic Research, Grant No. 19-35-90117.

T.O. Gushchina¹, Graduate Student, Engineer, e-mail: gushchina.t.o@gmail.com,
S.A. Silyutin, Cand. Sci. (Eng.), JSC Siberian Coal and Energy Company (SUEK), Moscow, Russia, e-mail: silutinsa@suek.ru,
E.E. Sokolovskaya¹, Leading Engineer, e-mail: sesokolovska@mail.ru,
S.A. Epshtein, Dr. Sci. (Eng.), Head of Laboratory, e-mail: apshtein@yandex.ru,
¹ Scientific and Educational Testing Laboratory «Physics and Chemistry of Coals», National University of Science and Technology «MISiS», 119049, Moscow, Russia.

S.A. Epshtein, e-mail: apshtein@yandex.ru.

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