Geochemical characterization of acid mine drainage associated with the Makum Coalfield, Assam, India
The Makum coalfield is the largest producing Tertiary coalfield in India. Several collieries are highly affected by acid mine drainage (AMD) problems. Two types of mine drainage water were recognized, namely nearly neutral and highly acidic. Both types are characterized by high concentration of SO<,4>, Fe, Al, Mn, and Ni while concentrations of Zn, Cr, Cu, Cd and Hg are lower. Tikak, Tirap and Tipong collieries were found to be highly affected where as Ledo and Baragolai collieries are less affected by AMD. There is a systematic decrease in concentration of metals and increase in pH away from the point of discharge of mine water. This may be due to adsorption of metals on to the secondary minerals precipitated from solution. X-ray diffraction indicates the presence of jarosite, goethite and schwertmannite in the ochreous precipitates.
Makum coalfield Acid mine drainage metals secondary minerals
Sk. Md. Equeenuddin S. Tripathy M. K. Panigrahi
Department of Geology & Geophysics, Indian Institute of Technology, Kharagpu-721302, India
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
598-599
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）