Implications of Mercury Speciation in Thiosulfate Treated Plants

	Implications of Mercury Speciation in Thiosulfate Treated Plants
	Wang, JX; Feng, XB; Anderson, CWN; Wang, H; Zheng, LR; Hu, TD;郑黎荣; Hu TD(胡天斗)
刊名	ENVIRONMENTAL SCIENCE & TECHNOLOGY
	2012
卷号	46 期号:10 页码:5361-5368
英文摘要	Mercury uptake was induced in two cultivars of Brassica juncea under field conditions using thiosulfate. Analysis was conducted to better understand the mechanism of uptake, speciation of mercury in plants, and redistribution of mercury in the soil. Plant mercury and sulfur concentrations were increased after thiosulfate treatment, and a linear correlation between mercury and sulfur was observed. Mercury may be absorbed and transported in plants as the Hg-thiosulfate complex. The majority of mercury in treated plant tissues (two cultivars) was bound to sulfur in a form similar to beta-HgS (66-94%). Remaining mercury was present in forms similar to Hg-cysteine (1-10%) and Hgdicysteine (8-28%). The formation of beta-HgS may relate to the transport and assimilation of sulfate in plant tissues. Mercury-thiosulfate complex could decompose to mercuric and sulfate ions in the presence of free protons inside the plasma membrane, while sulfide ions would be produced by the assimilation of sulfate. The concomitant presence of mercuric ions and S' would precipitate beta-HgS. The mercury concentration in the rhizosphere decreased in the treated relative to the nontreated soil. The iron/manganese oxide and organic-bound fractions of soil mercury were transformed to more bioavailable forms (soluble and exchangeable and specifically sorbed) and taken up by plants.
学科主题	Engineering; Environmental Sciences & Ecology
收录类别	SCI
WOS记录号	WOS:000303964700017
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/224258]
专题	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Wang, JX,Feng, XB,Anderson, CWN,et al. Implications of Mercury Speciation in Thiosulfate Treated Plants[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2012,46(10):5361-5368.
APA	Wang, JX.,Feng, XB.,Anderson, CWN.,Wang, H.,Zheng, LR.,...&胡天斗.(2012).Implications of Mercury Speciation in Thiosulfate Treated Plants.ENVIRONMENTAL SCIENCE & TECHNOLOGY,46(10),5361-5368.
MLA	Wang, JX,et al."Implications of Mercury Speciation in Thiosulfate Treated Plants".ENVIRONMENTAL SCIENCE & TECHNOLOGY 46.10(2012):5361-5368.