Leaching potential of arsenic from Pteris vittata L. under field conditions

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	Leaching potential of arsenic from Pteris vittata L. under field conditions
	Chen Tong-Bin; Yan Xiu-Lan; Liao Xiao-Yong
	2009
关键词	Arsenic Biogeochemistry Bioremediation Pollution
英文摘要	Foliar leaching might be an important process in the biogeochemical cycle of elements, but the leaching behaviors of As remain unclear. This study examined As leaching from foliage of an As-hyperaccumulator, Pteris vittata L. in the field. Results indicated that substantial amounts of As can be leached from the foliage by precipitation. Arsenic concentrations in the foliar leachate ranged from 4.06 to 519 μg L^{- 1}, and the percentages of As(III) with respect to total As in leachate ranged from 5% to 10%. A positive linear relationship existed between As concentrations of the foliar leachate and the amounts of As accumulated in the plant. The rate of As leaching from the leaves was accelerated by an increase of rainfall and time in a simulated precipitation experiment. Water-soluble As distributed within the cuticle and apoplast of the plant was speculated as the main source of the leached As. The As leaching is an important process of within-ecosystem As cycling in phytoremediation and it deserves further investigation. © 2009 Elsevier B.V. All rights reserved.
出处	Science of the Total Environment
卷	408 期:2 页:425-430
收录类别	EI
语种	英语
内容类型	EI期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/24451]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Chen Tong-Bin,Yan Xiu-Lan,Liao Xiao-Yong. Leaching potential of arsenic from Pteris vittata L. under field conditions. 2009.