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Effects of Cd(2+) and Pb(2+) on the substrate biofilms in the integrated vertical-flow constructed wetland
Zhang Jinlian1,2; Cheng Shuiping1; He Feng1; Liang Wei1; Wu Zhenbin1
2008
Source PublicationJOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
ISSN1001-0742
Volume20Issue:8Pages:900-906
AbstractThe effects of single Cd(2+) and Pb(2+), and combined Cd(2+) and Pb(2+) on dehydrogenase activity and polysaccharide content of the substrate biofilms in the integrated vertical-flow constructed wetland (IVCW) were studied. Dehydrogenase activities decreased linearly with the increasing concentrations of Cd(2+) and Pb(2+) at different times (6, 24, 72, and 120 h). The activities at both 6 and 24 h were significantly higher than that at 72 and 120 h in the case of single and combined treatments. The single Cd(2+) and Pb(2+) treatments significantly inhibited dehydrogenase activities at concentrations in excess of 20 mu mol/L Cd(2+) and 80 mu mol/L Pb(2+), respectively. The inhibitory effect of Cd(2+) was much greater than that of Pb(2+). At the same time, the combined treatment of Cd(2+) and Pb(2+) Significantly inhibited dehydrogenase activities at all five concentrations studied and the lowest combined concentration was 1.25 mu mol/L Cd(2+) and 5 mu mol/L Pb(2+). A synergistic effect of Cd(2+) and Pb(2+) was observed. On the other hand, polysaccharide contents varied unpredictably with the increasing concentrations of Cd(2+) and Pb(2+) and extended experimental time. There were no significant statistical differences within the range of concentration and time studied, whether singly or in combination. These results implied that the effects of heavy metals on biofilms should be a concern for the operation and maintenance of constructed wetlands.
SubtypeArticle
KeywordCd(2+) Pb(2+) Biofilms Dehydrogenase Activity Polysaccharide Content Integrated Vertical-flow Constructed Wetland (Ivcw)
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Indexed BySCI
Language英语
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS KeywordRESPIRING BACTERIA ; HEAVY-METALS ; REMOVAL ; NUTRIENT
WOS IDWOS:000258460100002
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/27365
Collection水环境工程研究中心
Affiliation1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhang Jinlian,Cheng Shuiping,He Feng,et al. Effects of Cd(2+) and Pb(2+) on the substrate biofilms in the integrated vertical-flow constructed wetland[J]. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,2008,20(8):900-906.
APA Zhang Jinlian,Cheng Shuiping,He Feng,Liang Wei,&Wu Zhenbin.(2008).Effects of Cd(2+) and Pb(2+) on the substrate biofilms in the integrated vertical-flow constructed wetland.JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,20(8),900-906.
MLA Zhang Jinlian,et al."Effects of Cd(2+) and Pb(2+) on the substrate biofilms in the integrated vertical-flow constructed wetland".JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA 20.8(2008):900-906.
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