【摘要】 为评价喀斯特背景条件下天然碳酸盐矿物对风化煤矸石典型污染物释放的控制效果,在风化煤矸石中分别添加纯品碳酸钙及3种典型天然碳酸盐矿物(石灰石、白云石、方解石),对混合物浸出液特征污染组分进行分析。结果表明,纯品碳酸钙及3种天然碳酸盐矿物均能有效缓冲风化煤矸石的酸度,并显著抑制Fe2+、Mn2+、Cu2+、SO2-4等多种特征污染物的溶出,但天然碳酸盐矿物对Zn2+释放的控制效果不明显,特别是方解石在一定程度上甚至促进了Zn2+的释放。在污染控制效果上,纯品碳酸钙的控制效果最优,其次是石灰石,而白云石和方解石对污染物的控制效果相对较差,两者处理后风化煤矸石浸出液中溶出组分没有明显差异。更多还原

【Abstract】 In order to evaluate the effects of different carbonate minerals on the release of contaminants from weathering coal gangue under the karst conditions,the author added three typical minerals(limestone,dolomite,calcite)and pure calcium carbonate in weathering coal gangue to investigate the releasing of typical pollutants in weathering coal gangue leachate.The results showed that pure calcium carbonate and natural carbonate minerals could buffer the acidity and inhibit contaminants releasing significantly,such as Fe2+,Mn2+,Cu2+and SO2-4.However,all three natural carbonate minerals had no obvious effect on Zn2+releasing control.And calcite,to some extent,played a role in promoting Zn2+releasing from weathering coal gangue.From the view of pollution control,pure calcium carbonate was best treatment agent and limestone was on the second place,while for dolomite and calcite,their control effect was relative poor without evident difference.更多还原