Promotion of pyrene degradation in rhizosphere of alfalfa (Medicago sativa L.)

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	Promotion of pyrene degradation in rhizosphere of alfalfa (Medicago sativa L.)
	Fan, SX ; Li, PJ ; Gong, ZQ ; Ren, WX ; He, N
刊名	CHEMOSPHERE
	2008
卷号	71 期号:8 页码:1593-1598
关键词	PAHs phytoremediation alfalfa (Medicago saliva L.) pyrene
ISSN号	0045-6535
通讯作者	Li, PJ, Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China
中文摘要	Pot experiment was conducted to evaluate the phytoremediation of pyrene-contaminated soil using alfalfa (Medicago sativa L.). Alfalfa biomasses, microbial viable counts, dehydrogenase activity, residual pyrene concentration and pyrene removal percentage were determined after 60 days of alfalfa growth. The results indicated that pyrene had an inhibitive effect on alfalfa growth, and higher pyrene concentration seriously affected alfalfa growth. In addition, the inhibitive effect on the root was more severe than that on the shoot. When pyrene concentration reached 492 mg kg(-1) in soil, the shoot and root biomasses were only 34%, and 22% of those of alfalfa growing in non-spiked soil, respectively. The rhizospheric bacterial and fungi counts were 5.0-7.5 and 1.8-2.3 times higher than those in non-rhizosphere soil, respectively. The residual concentrations of pyrene in the rhizosphere soil were lower than those in the non-rhizosphere soil. After 60 days, 69-85% and 59-80% of spiked pyrene disappeared from the rhizosphere and non-rhizosphere soils, respectively. The removal percentage decreased with increasing pyrene concentration. However, the average removal of pyrene in the rhizosphere soil was 6%) higher than that in the non-rhizosphere soil. Therefore, the presence of alfalfa roots was effective in promoting the phytoremediation of freshly added pyrene into the soil. (C) 2007 Elsevier Ltd. All rights reserved.
学科主题	Environmental Sciences
收录类别	SCI
语种	英语
WOS记录号	WOS:000255384300022
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/54473]
专题	沈阳应用生态研究所_沈阳应用生态研究所_期刊论文
推荐引用方式 GB/T 7714	Fan, SX,Li, PJ,Gong, ZQ,et al. Promotion of pyrene degradation in rhizosphere of alfalfa (Medicago sativa L.)[J]. CHEMOSPHERE,2008,71(8):1593-1598.
APA	Fan, SX,Li, PJ,Gong, ZQ,Ren, WX,&He, N.(2008).Promotion of pyrene degradation in rhizosphere of alfalfa (Medicago sativa L.).CHEMOSPHERE,71(8),1593-1598.
MLA	Fan, SX,et al."Promotion of pyrene degradation in rhizosphere of alfalfa (Medicago sativa L.)".CHEMOSPHERE 71.8(2008):1593-1598.