Observations on sequential leaching and predicting of the effects of placing CCBs in contact with mine spoil
Studies of the Mine Water Leaching Procedure (MWLP) using acid mine water and coal combustion by-products (CCBs) determined that many metals are controlled in solution solubility or solubility like processes. Gypsum and barite were found to be supersaturated in the extracting solutions. The constituent solution concentrations do not depend, within limits, on the volume of extracting fluid, although the total mass extracted is a function of the volume. Addition of mine spoil to the CCB did not substantially change the extraction results. The pH of the solution from the first extraction cycle was lower in the presence of spoil. Certain constituents were leached to a greater degree in the first cycle with spoil, but the total extracted mass over multiple cycles remained constant.
Coal ash contaminant concentrations mine spoils sequential leaching
Paul F. Ziemkiewicz Raymond J. Lovett
West Virginia Water Research Institute at West Virginia University, Morgantown, WV 26506, U. S. A ShipShapper, LLP, Morgantown, WV 26506, USA
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
370-371
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）