Moyo Stanley, Mujuru Munyaradzi, McCrindle Rob I, Mokgalaka-Matlala Ntebogeng
Department of Chemistry, Tshwane University of Technology, Arcadia Campus, PO Box 56208, Arcadia 0007, Pretoria, Republic of South Africa.
J Environ Monit. 2011 May;13(5):1488-94. doi: 10.1039/c1em10091b. Epub 2011 Apr 12.
Samples of coal were collected from different seams at a South African coal mine and comparative leaching experiments were carried out under various pH conditions and times to investigate the leaching behavior and potential environmental impact of possibly hazardous elements such as As, Cd, Co, Cr, Mn, Ni, Pb, Th and U. The calculated leaching intensities, sequential extraction results and cumulative percentages demonstrate that the leaching behavior of the elements is strongly influenced by the pH, the leaching time and the properties and occurrences of the elements. The leached concentrations of As, Cd, Co, Cr, Mn, Ni and Pb exceeded the maximum concentrations recommended by the Environmental Protection Agency (EPA) for surface water.
从南非某煤矿的不同煤层采集了煤样，并在不同pH条件和时间下进行了对比浸出实验，以研究砷、镉、钴、铬、锰、镍、铅、钍和铀等潜在有害元素的浸出行为及其对环境的潜在影响。计算得出的浸出强度、连续萃取结果和累积百分比表明，元素的浸出行为受pH值、浸出时间以及元素的性质和赋存状态的强烈影响。砷、镉、钴、铬、锰、镍和铅的浸出浓度超过了美国环境保护局（EPA）推荐的地表水最大浓度。
