五种挺水植物对矿山废水中锰的去除效能比较

以水葱、香蒲、芦苇、灯芯草和野茭白五种挺水植物为研究对象,通过实验室模拟人工湿地系统,研究在投加不同浓度梯度人工拟合酸性矿山废水条件下各植物对重金属锰的去除效能以及植物各部位对锰的富集能力。结果表明,野茭白和水葱的去除效能最显著,第七天的去除率达到90%和76%以上,香蒲的相对较差,为56%以上。五种植物各部位对重金属锰的富集能力均遵循同一规律:对于无茎植物,根富集浓度大于叶富集浓度;对于有茎植物,则为根大于茎大于叶。

Study on Removal Efficiency of Mn in Acid Mine Sewage by Five Macrophytes

With simulated constructed wetlands as experiment basis, the removal efficiency of Mn under different concentrations of man - made acid mine sewage and the bioaccumulation ability of each part of the five macrophytes were studied in this article. The results show that the zizania aquatica and scirpus validus are most effective in the five macrophytes with removal rate of 90% and 76% in the seventh day. The typha orientalis is achieve only above 56%. The bioaccumulation ability of the each part of the five macrophytes on Mn is consistent with the same removal rate sequence. The roots perform better than leaf for acaulescent macrophytes, and vice versa for caulescent macrophytes.