广东乐昌铅锌尾矿废弃地酸化控制研究

Effects of Different Improvements on Controlling Acidification of Pb/Zn Tailings

对建立在乐昌铅锌尾矿废弃地的复垦实验地进行了调查分析．结果表明，在１２种不同的改良措施中，在废弃地上铺盖厚约２０ｃｍ垃圾及２０ｋｇ／ｍ２石灰的改良效果最好，这一措施不仅提高了尾矿ｐＨ值和降低电导率，而且较有效地防止了下层尾矿的酸化。

Field survey and lab assay on the tailings improving experimental site of Lechang Pb/Zn tailings showed that all improvements made various effects on controlling acidification of tailings Among 12 improvements, the best one was the I improvement(all covered by municipal waste mingled by 20 kg lime per one square meter), it not only better controlled the acidification of upper tailings layer(0～20 cm), but also better controlled the acidification of the lower tailing layer than others In addition,its biomass was the most one This demonstrated the I improvement had better improving effect on controlling acidification of Pb/Zn tailings