Biological leaching of heavy metals from a contaminated soil by Aspergillus niger

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	Biological leaching of heavy metals from a contaminated soil by Aspergillus niger
	Ren, WX; Li, PJ; Geng, Y; Li, XJ; Li, PJ, Chinese Acad Sci, Inst Appl Ecol, 72 Wenhua Rd, Shenyang 110016, Peoples R China
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2009
卷号	167 期号:1-3 页码:164-169
关键词	Aspergillus Niger Bioleaching Contaminated Soil Heavy Metal
ISSN号	0304-3894
英文摘要	Bioleaching of heavy metals from a contaminated soil in an industrial area using metabolites, mainly weak organic acids, produced by a fungus Aspergillus niger was investigated. Batch experiments were performed to compare the leaching efficiencies of one-step and two-step processes and to determine the transformation of heavy metal chemical forms during the bioleaching process. After the one or two-step processes, the metal removals were compared using analysis of variance (ANOVA) and least-significance difference (LSD). A. niger exhibits a good potential in generating a variety of organic acids effective for metal solubilisation. Results showed that after the one-step process, maximum removals of 56%, 100%, 30% and 19% were achieved for copper, cadmium, lead and zinc, respectively. After the two-step process, highest removals of 97.5% Cu, 88.2% Cd, 26% Pb, and 14.5% Zn were obtained. Results of sequential extraction showed that organic acids produced by A. niger were effective in removing the exchangeable, carbonate, and Fe/Mn oxide fractions of Cu, Cd, Pb and Zn; and after both processes the metals remaining in the soil were mainly bound in stable fractions. Such a treatment procedure indicated that leaching of heavy metals from contaminated soil using A. niger has the potential for use in remediation of contaminated soils. (C) 2009 Published by Elsevier B.V.
学科主题	Engineering ; Environmental ; Civil ; Engineering ; Environmental Sciences
语种	英语
WOS记录号	WOS:000267267000022
资助机构	National Basic Research Program of China [2004CB418506]; Key Program of Knowledge Innovation ; Chinese Academy of Sciences [KZCXI-YW-06-03]; National High Technology Research and Development Program of China (863 Program) [2007AA061101]; Welfare Program for Environmental Protection [200809047]; Chinese Academy of Science's
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/54111]
专题	沈阳应用生态研究所_沈阳应用生态研究所
通讯作者	Li, PJ, Chinese Acad Sci, Inst Appl Ecol, 72 Wenhua Rd, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Ren, WX,Li, PJ,Geng, Y,et al. Biological leaching of heavy metals from a contaminated soil by Aspergillus niger[J]. JOURNAL OF HAZARDOUS MATERIALS,2009,167(1-3):164-169.
APA	Ren, WX,Li, PJ,Geng, Y,Li, XJ,&Li, PJ, Chinese Acad Sci, Inst Appl Ecol, 72 Wenhua Rd, Shenyang 110016, Peoples R China.(2009).Biological leaching of heavy metals from a contaminated soil by Aspergillus niger.JOURNAL OF HAZARDOUS MATERIALS,167(1-3),164-169.
MLA	Ren, WX,et al."Biological leaching of heavy metals from a contaminated soil by Aspergillus niger".JOURNAL OF HAZARDOUS MATERIALS 167.1-3(2009):164-169.