Effects of humic acids on phytoextraction of Cu and Cd from sediment by Elodea nuttallii

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	Effects of humic acids on phytoextraction of Cu and Cd from sediment by Elodea nuttallii
	Wang, Qian 1,2; Li, Zhu 1,2; Cheng, Shuiping 1; Wu, Zhenbin 1
刊名	CHEMOSPHERE
	2010
卷号	78 期号:5 页码:604-608
关键词	Phytoremediation In situ Submerged macrophyte Accumulation
ISSN号	0045-6535
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	Growth and metal-accumulation of Elodea nuttallii exposed to Cu and Cd-contaminated sediment were examined and the effects of humic acids on phytoextraction of Cu and Cd were also investigated. The growth of plants were promoted with the increasing concentration of Cu in sediment, while inhibited by Cd during the 21 d exposure. The concentrations of Cu in roots and shoots of E. nuttallii ranged 25-99 mg kg(-1) dry weight (DW) and 23-83 mg kg(-1) DW under different concentration of Cu treatments in sediment at the end of exposure, and they were 0-6.5 mg kg(-1) DW and 0-7.9 mg kg(-1) DW for Cd, respectively. With addition of humic acids from 3.0 to 7.8 g kg(-1) DW, the bioavailability of heavy metals in the sediment were reduced significantly, therefore, the accumulation of Cd was inhibited and the Cd concentrations in roots and shoots of plants decreased. However, as the result of release Cu from sediment into water column with addition of humic acids, and E. nuttallii could uptake Cu from water directly, the Cu concentrations in roots and shoots in plant increased 26-69% and 40-78%, respectively. In conclusion, E. nuttallii could be suitable for remedying Cu and Cd-contaminated sediment in situ as a pioneer species, but for phytoextraction of Cd, the application of humic acids should be careful. (C) 2009 Published by Elsevier Ltd.
英文摘要	Growth and metal-accumulation of Elodea nuttallii exposed to Cu and Cd-contaminated sediment were examined and the effects of humic acids on phytoextraction of Cu and Cd were also investigated. The growth of plants were promoted with the increasing concentration of Cu in sediment, while inhibited by Cd during the 21 d exposure. The concentrations of Cu in roots and shoots of E. nuttallii ranged 25-99 mg kg(-1) dry weight (DW) and 23-83 mg kg(-1) DW under different concentration of Cu treatments in sediment at the end of exposure, and they were 0-6.5 mg kg(-1) DW and 0-7.9 mg kg(-1) DW for Cd, respectively. With addition of humic acids from 3.0 to 7.8 g kg(-1) DW, the bioavailability of heavy metals in the sediment were reduced significantly, therefore, the accumulation of Cd was inhibited and the Cd concentrations in roots and shoots of plants decreased. However, as the result of release Cu from sediment into water column with addition of humic acids, and E. nuttallii could uptake Cu from water directly, the Cu concentrations in roots and shoots in plant increased 26-69% and 40-78%, respectively. In conclusion, E. nuttallii could be suitable for remedying Cu and Cd-contaminated sediment in situ as a pioneer species, but for phytoextraction of Cd, the application of humic acids should be careful. (C) 2009 Published by Elsevier Ltd.
学科主题	Environmental Sciences
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Environmental Sciences
研究领域[WOS]	Environmental Sciences & Ecology
关键词[WOS]	HEAVY-METALS ; ORGANIC-MATTER ; CADMIUM ; COPPER ; CANADENSIS ; ACCUMULATION ; SOIL ; BIOAVAILABILITY ; SUBSTANCES ; EXTRACTION
收录类别	SCI
资助信息	National Major Program of Science and Technology [2008ZX07316-004]; Chinese Academy of Sciences [KZCX2-YW-426]
语种	英语
WOS记录号	WOS:000274370900016
公开日期	2010-12-23
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/13731]
专题	水生生物研究所_水环境工程研究中心_期刊论文
作者单位	1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 10039, Peoples R China
推荐引用方式 GB/T 7714	Wang, Qian,Li, Zhu,Cheng, Shuiping,et al. Effects of humic acids on phytoextraction of Cu and Cd from sediment by Elodea nuttallii[J]. CHEMOSPHERE,2010,78(5):604-608.
APA	Wang, Qian,Li, Zhu,Cheng, Shuiping,&Wu, Zhenbin.(2010).Effects of humic acids on phytoextraction of Cu and Cd from sediment by Elodea nuttallii.CHEMOSPHERE,78(5),604-608.
MLA	Wang, Qian,et al."Effects of humic acids on phytoextraction of Cu and Cd from sediment by Elodea nuttallii".CHEMOSPHERE 78.5(2010):604-608.