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Minerals 2018, 8(9), 403; https://doi.org/10.3390/min8090403

Characterization of Mine Waste and Acid Mine Drainage Prediction by Simple Testing Methods in Terms of the Effects of Sulfate-Sulfur and Carbonate Minerals

1
Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, Higashi 1-1-1, Ibaraki, Tsukuba 305-8567, Japan
2
Department of Earth Resources Engineering, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
3
Department of Mining Engineering, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, Indonesia
*
Author to whom correspondence should be addressed.
Received: 13 July 2018 / Revised: 4 September 2018 / Accepted: 10 September 2018 / Published: 13 September 2018
(This article belongs to the Special Issue Acid Mine Drainage Recovery)
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Abstract

Characterization of mine waste rocks and prediction of acid mine drainage (AMD) play an important role in preventing AMD. Although high-tech analytical methods have been highlighted for mineral characterization and quantification, simple testing methods are still practical ways to perform in a field laboratory in mines. Thus, this study applied some simple testing methods to the characterization of mine wastes and AMD prediction in addition to a leaching test and the sequential extraction test with HCl, HF, and HNO3, which have not been applied for these purposes, focusing on the form of sulfur and the neutralization effects of carbonates. The results of the Acid Buffering Characteristic Curve test supported the changing trend of the pH attributing carbonates only during the first 10 leaching cycles in the leaching test. The change in the Net Acid Generating (NAG) pH in the sequential NAG test reflected the solubility of sulfur in the rocks, providing information on the form of sulfur in the rocks and the acid-producing potential over time. Consequently, the sequential NAG test and sequential extraction with the acids in combination with the current standards tests (Acid Base Accounting and NAG tests) provided important information for preventing AMD. View Full-Text
Keywords: open-cast mining; acid mine drainage (AMD); cover system; leaching test; sequential extraction test; sulfate-sulfur; carbonate minerals open-cast mining; acid mine drainage (AMD); cover system; leaching test; sequential extraction test; sulfate-sulfur; carbonate minerals
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Matsumoto, S.; Ishimatsu, H.; Shimada, H.; Sasaoka, T.; Kusuma, G.J. Characterization of Mine Waste and Acid Mine Drainage Prediction by Simple Testing Methods in Terms of the Effects of Sulfate-Sulfur and Carbonate Minerals. Minerals 2018, 8, 403.

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