Econ. Environ. Geol. 2003; 36(2): 103-109

Published online April 30, 2003

© THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY

Mineralogy of Evaporation Residues and Geochemistry of Acid Mine Drainage in the Donghae Mine Area

Jeong-Jin Kim1*, Soo-Jin Kim1 and Yoon-Young Kim2

1School of Earth and Environmental Sciences, Seoul National University, Seoul 151-742, Korea
2Institute of Industrial Management, Chung-Ang University, Ansung-city, Kyunggi-do, 456-756, Korea

Correspondence to :

Jeong-Jin Kim

kjjkjj@plaza.snu.ac.kr

Received: January 16, 2003; Accepted: March 26, 2003

Abstract

The mineralogy of material left after evaporation of acid mine drainage water is generally dependent on the chemical composition of the source water. The residues formed by the evaporation of acid mine water in the Donghae coal mine area consists mainly of gypsum (CaSO4  2H2O) with minor amounts of alunogen (Al2(SO4)3 ㆍ17H2O) and hexahydrite (MgSO4ㆍ6H2O). Gypsum was identified from both of the bottom precipitates and the evaporation residues of acid mine water. Alunogen, an aluminum sulfate hydrate, was also formed by evaporation and occurred as needle-like crystals. Aluminum is derived from chemical dissolution of alumino-silicate mineral such as pyrophyllite, illite and chlorite in wasted rocks. Hexahydrite in evaporation residues occured as needle-like, fibrous, and
acicular crystals and was associated with gypsum and alunogen.

Keywords acid mine drainage, evaporation residues, gypsum, alunogen, hexahydrite

Article

Econ. Environ. Geol. 2003; 36(2): 103-109

Published online April 30, 2003

Copyright © THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY.

Mineralogy of Evaporation Residues and Geochemistry of Acid Mine Drainage in the Donghae Mine Area

Jeong-Jin Kim1*, Soo-Jin Kim1 and Yoon-Young Kim2

1School of Earth and Environmental Sciences, Seoul National University, Seoul 151-742, Korea
2Institute of Industrial Management, Chung-Ang University, Ansung-city, Kyunggi-do, 456-756, Korea

Correspondence to:

Jeong-Jin Kim

kjjkjj@plaza.snu.ac.kr

Received: January 16, 2003; Accepted: March 26, 2003

Abstract

The mineralogy of material left after evaporation of acid mine drainage water is generally dependent on the chemical composition of the source water. The residues formed by the evaporation of acid mine water in the Donghae coal mine area consists mainly of gypsum (CaSO4  2H2O) with minor amounts of alunogen (Al2(SO4)3 ㆍ17H2O) and hexahydrite (MgSO4ㆍ6H2O). Gypsum was identified from both of the bottom precipitates and the evaporation residues of acid mine water. Alunogen, an aluminum sulfate hydrate, was also formed by evaporation and occurred as needle-like crystals. Aluminum is derived from chemical dissolution of alumino-silicate mineral such as pyrophyllite, illite and chlorite in wasted rocks. Hexahydrite in evaporation residues occured as needle-like, fibrous, and
acicular crystals and was associated with gypsum and alunogen.

Keywords acid mine drainage, evaporation residues, gypsum, alunogen, hexahydrite

    KSEEG
    Jun 30, 2024 Vol.57 No.3, pp. 281~352

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