Известия Томского политехнического университета: Инжиниринг георесурсов (Oct 2022)
IMPACT OF TECHNOGENIC WATERS ON THE RUDNAYA RIVER OF THE RUSSIAN FAR EAST
Abstract
The relevance of the research is in significant negative impact of technogenic waters of tin-sulfide and tin-polymetallic tailings of the Dalnegorsk ore district of the Russian Far East on natural water bodies, as well as the in importance of studying their mixing processes on geochemical barriers «technogenic – natural surface waters». The main aim of the research is to consider processes of mixing of sludge and drainage waters of tailings dumps with natural waters of the Rudnaya River, occurring on geochemical barriers «technogenic – surface natural waters». Objects: technogenic waters – drainage and sludge waters of the tin-polymetallic tailings pond of the Central Concentrating Mill, as well as drainage, slurry, and tailings waters of the tin-sulfide tailings pond of the Krasnorechensk Concentrating Mill, Dalnegorsk ore district; natural surface waters of the Rudnaya River; «technogenic – natural surface waters» geochemical barriers. Methods: environmental monitoring – sampling and analysis of hydrochemical samples by inductively coupled plasma mass spectrometry and atomic emission spectrometry; computer physical and chemical (thermodynamic) simulation in «Selektor-Windows» software complex; simulation of processes flowing on geochemical barriers «technogenic – natural surface waters» – formation of computer multi reservoir models by type of flow reactor; consideration of aqueous solutions formation on geochemical barriers was carried out at dilution of technogenic waters with natural waters in the ratio 1:1, 1:10, 1:100, 1:1000 to establish quantitative (elements of sulfide ores and host rocks) and qualitative (their ions and molecules) composition of water solutions and crystallization of technogenic minerals from them. Results. According to the results of environmental monitoring, the chemical composition of anthropogenic and natural waters of the Dalnegorsk ore district was established seasonally. The processes of water solutions formation in summer, autumn and winter on different geochemical barriers «anthropogenic – natural waters» in accordance with the adopted ratios were simulated in «Selektor-Windows» software package. Based on the analysis of the obtained results, the article presents quantitative and qualitative composition of seasonally formed solutions, shows minerals crystallizing from them and distribution of sulfide ore elements on geochemical barriers, which confirms the negative impact of tailing dumps technogenic waters on the Rudnaya River.
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