Severity of drainage system exposure to ore processing waste based on computer modeling

Extensive subsoil use for many decades for satisfaction of increasingly growing economic requirements has resulted in accumulation of gigantic volume of mining and processing waste on the ground surface. Overburden dumps, low-grade ore stockpiles and tailings pose a grave threat to the environment. As a result of various supergene processes, this waste decomposes; highly-mineralized pore solutions appear, flow with drainage water and bring a wide spectrum of chemicals, including toxic elements, to the environment. Based on the computer modeling of physicochemical transformation of mineral processing waste in terms of the skarn complex deposits in the Dalnegorsk area (Primorye), as well as from thermodaynamic calculation of the behavior of natural chemical compounds under condition of hypergenesis, the qualitative composition and quantitative formula are determined for mineralized pore solutions in drainage water in local drainage systems. These solutions are dominated by ionic and complex forms of such elements as As, Pb, Zn, Cd, Se, Sb, Bi, Cu and other, at concentrations tens and hundreds times higher than the maximum allowable values. Computer modeling of supergene transformation of ore processing waste allows prompt qualitative and qualitative assessment of probable pollution in the area of tailings storage and, consequently, enables sound environmental measures to be undertaken to mitigate the ecological impact.

 

Acknowledgements:
For citation:

Kemkin I. V., Kemkina R. A. Severity of drainage system exposure to ore processing waste based on computer modeling . MIAB. Mining Inf. Anal. Bull. 2019;(11):94-105. [In Russ]. DOI: 10.25018/0236-1493-2019-11-0-94-105.

 

Issue number: 11
Year: 2019
Page number: 94-105
ISBN: 0236-1493
UDK: 553.44 + 502/504
DOI: 10.25018/0236-1493-2019-11-0-94-105
Authors: Kemkin I. V., Kemkina R. A.
About authors:

I.V. Kemkin1, Dr. Sci. (Geol. Mineral.), Professor, е-mail: kemkin@fegi.ru;
Head of Laboratory, Far Eastern Geological Institute, Far Eastern Branch
of Russian Academy of Sciences, 680022, Vladivostok, Russia,
R.A. Kemkina1, Cand. Sci. (Geol. Mineral.), Assistant Professor,
1 Engineering School of Far Eastern Federal University, 690950, Vladivostok, Russia.

Keywords: Ore processing waste, hypergenesis, mineral destruction, mineralized solutions, toxic elements, ecological risk.
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