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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)
2012
发表期刊ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷号46期号:10页码:5361-5368
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.
学科领域Engineering; Environmental Sciences & Ecology
DOI10.1021/es204331a
收录类别SCI
WOS记录号WOS:000303964700017
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被引频次:26[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224258
专题多学科研究中心
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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.
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