摘要
选择黄菖蒲(挺水植物)、大薸(浮水植物)、黑藻(沉水植物)3种类型水生植物,通过静态水培试验,以无植物空白系统为对照,考察了3种水生植物及其组合对水体中的铬、氮和磷的净化效果。结果表明,植物对TN、TP、6价铬和总铬有一定的净化效果,试验后期与试验开始时相比植物对TN、TP、6价铬和总铬的净化效果均有不同程度的下降;4种植物系统对TN和TP去除能力的顺序相同,即大薸>组合>黑藻>黄菖蒲,对6价铬的去除能力为组合>黄菖蒲>黑藻>大薸,对总铬的去除能力为黄菖蒲>组合>黑藻>大薸。同单一的植物相比,3种植物组合系统对氮、磷和重金属铬都有较好的去除效果,且生长良好,可在治理含铬富营养化水体时结合实际考虑采用。
Three types of aquatic plants：Iris pseudacorus（emergent plants）,Pistia stratiotes（floating plants） and Hydrilla verticillata（submerged plants） were selected.Through the static water control experiment and comparison of the blank system without plant,the purification ability of three types of aquatic plants to remove chromium,nitrogen and phosphorus in water were investigated.Test showed that three plants were some effective on the removal of TN,TP,Cr6＋and total chromium.Compared to the start of the trial,in the late purification efficiency of the plants on TN,TP,Cr6＋ and total chromium decline in different degrees.The order of the removal capacity of four different plant systems to TN and TP were same,which was,Pistia stratiotes combination Hydrilla verticillata Iris pseudacorus;The order of the removal capacity to Cr6＋,as follows,combination Iris pseudacorus Hydrilla verticillata Pistia stratiotes;The order of the removal capacity to total chromium,as follows,Iris pseudacorus combination Hydrilla verticillata Pistia stratiotes.Compared with a single plant,the system combining three plants growth had a good effect on the removal of nitrogen,phosphorus and chromium,and grew well,so it can be applied to manage the eutrophic water body with chromium.
出处
《水处理技术》
CAS
CSCD
北大核心
2012年第4期45-48,54,共5页
Technology of Water Treatment
基金
国家水体污染控制与治理科技重大专项(2008ZX07101-007-02)
关键词
人工湿地
重金属污染
富营养化
生态修复
constructed wetland
heavy metal pollution
eutrophication
ecological restoration
