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Efficiency of constructed wetlands in decontamination of water polluted by heavy metals
Shuiping Cheng; Wolfgang Grosse; Friedhelm Karrenbrock; Manfred Thoennessen; Cheng, SP, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
2002
Source PublicationECOLOGICAL ENGINEERING
Volume18Issue:3Pages:317-325
AbstractA 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.
KeywordConstructed Wetland Heavy Metals Decontamination Cyperus AL.ernifoL.us L. Phytoremediation Water Pollution
DepartmentUniv Cologne, Inst Bot, D-50931 Cologne, Germany; GEW Koeln AG, Water Lab, D-50823 Cologne, Germany; Univ Cologne, Inst Geog, D-50674 Cologne, Germany
Subject AreaEcology ; Environmental ; Engineering ; Environmental Sciences
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/9892
Collection期刊论文
Corresponding AuthorCheng, SP, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
Recommended Citation
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,&Cheng, SP, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China.(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.
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