Efficiency of constructed wetlands in decontamination of water polluted by heavy metals

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	Efficiency of constructed wetlands in decontamination of water polluted by heavy metals
	Shuiping Cheng ; Wolfgang Grosse ; Friedhelm Karrenbrock ; Manfred Thoennessen
刊名	ECOLOGICAL ENGINEERING
	2002
卷号	18 期号:3 页码:317-325
关键词	constructed wetland heavy metals decontamination Cyperus alternifolius L. phytoremediation water pollution
通讯作者	Cheng, SP, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
中文摘要	A twin-shaped constructed wetland (CW) comprising a vertical flow (inflow) chamber with Cyperus alternifolius followed by a reverse-vertical flow (outflow) chamber with Villarsia exaltata was assessed for decontamination of artificial wastewater polluted by heavy metals. After application of Cd, Cu, Pb, Zn over 150 days, together with Al and Mn during the final 114 days, no heavy metals with the exception of Mn could be detected in either the drainage zone at the bottom, shared by both chambers, or in the effluent. The inflow chamber was, therefore, seen to be predominantly responsible for the decontamination process of more toxic metal species with final concentrations far below WHO drinking-water standards. About one-third of the applied Cu and Mn was absorbed, predominantly by lateral roots of C. alternifolius. Lower accumulation levels were observed for Zn (5%), Cd (6%), Al (13%). and Pb (14%). Contents of Cd, Cu, Mn, and Zn in soil were highest in top layer, while Al and Pb were evenly distributed through the whole soil column. Metal species accumulating mainly in the top layer can be removed mechanically. A vertical flow CW with C. alternifolius is an effective tool in phytoremediation for treatment of water polluted with heavy metals. (C) 2002 Elsevier Science B.V. All rights reserved.
学科主题	Ecology; Engineering ; Environmental; Environmental Sciences
收录类别	SCI
公开日期	2010-10-13
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/152342/9892]
专题	水生生物研究所_中科院水生所知识产出（2009年前）_期刊论文
推荐引用方式 GB/T 7714	Shuiping Cheng,Wolfgang Grosse,Friedhelm Karrenbrock,et al. Efficiency of constructed wetlands in decontamination of water polluted by heavy metals[J]. ECOLOGICAL ENGINEERING,2002,18(3):317-325.
APA	Shuiping Cheng,Wolfgang Grosse,Friedhelm Karrenbrock,&Manfred Thoennessen.(2002).Efficiency of constructed wetlands in decontamination of water polluted by heavy metals.ECOLOGICAL ENGINEERING,18(3),317-325.
MLA	Shuiping Cheng,et al."Efficiency of constructed wetlands in decontamination of water polluted by heavy metals".ECOLOGICAL ENGINEERING 18.3(2002):317-325.