Implications of Mercury Speciation in Thiosulfate Treated Plants

	Implications of Mercury Speciation in Thiosulfate Treated Plants
	Jianxu Wang; Xinbin Feng; Christopher W. N. Anderson; Heng Wang; Lirong Zheng; Tiandou Hu
通讯作者	Xinbin Feng
	2012
发表期刊	Environmental Science and 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	环境地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/4844
专题	环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文环境地球化学国家重点实验室
通讯作者	Xinbin Feng
推荐引用方式 GB/T 7714	Jianxu Wang,Xinbin Feng,Christopher W. N. Anderson,et al. Implications of Mercury Speciation in Thiosulfate Treated Plants[J]. Environmental Science and Technology,2012,46(10):5361-5368.
APA	Jianxu Wang,Xinbin Feng,Christopher W. N. Anderson,Heng Wang,Lirong Zheng,&Tiandou Hu.(2012).Implications of Mercury Speciation in Thiosulfate Treated Plants.Environmental Science and Technology,46(10),5361-5368.
MLA	Jianxu Wang,et al."Implications of Mercury Speciation in Thiosulfate Treated Plants".Environmental Science and Technology 46.10(2012):5361-5368.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Implications of Merc（790KB）			开放获取	使用许可	浏览下载