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Total mercury and methylmercury accumulation in wild plants grown at wastelands composed of mine tailings: Insights into potential candidates for phytoremediation
Xiaoli Qian;  Yonggui Wu;  Hongyun Zhou;  Xiaohang Xu;  Zhidong Xu;  Lihai Shang;  Guangle Qiu
2018
发表期刊Environmental Pollution
卷号239页码:757-767
摘要

Total mercury (THg) and methylmercury (MMHg) were investigated in 259 wild plants belonging to 49 species in 29 families that grew in heavily Hg-contaminated wastelands composed of cinnabar ore mine tailings (calcines) in the Wanshan region, southwestern China, the world's third largest Hg mining district. The bioconcentration factors (BCFs) of THg and MMHg from soil to roots ([THg](root)/[THg](soil), [MMHg](root)/[MMHg](soil)) were evaluated. The results showed that THg and MMHg in both plants and soils varied widely, with ranges of 0.076-140 mu g/g THg and 0.19-87 ng/g MMHg in roots, 0.19-106 mu g/g THg and 0.06-31 ng/g MMHg in shoots, and 0.74-1440 mu g/g THg and 0.41-820 ng/g MMHg in soil. Among all investigated species, Arthraxon hispidus, Eremochloa ciliaris, Clerodendrum bunge, and Ixeris sonchifolia had significantly elevated concentrations of THg in shoots and/or roots that reached 100 mu g/g, whereas Chenopodium glaucum, Corydalisedulis maxim, and Rumex acetosa contained low values below 0.5 mu g/g. In addition to the high THg concentrations, the fern E. ciliaris also showed high BCF values for both THg and MMHg exceeding 1.0, suggesting its capability to extract Hg from soils. Considering its dominance and the tolerance identified in the present study, E. ciliaris is suggested to be a practical candidate for phytoextraction, whereas A. hispidus is identified as a potential candidate for phytostabilization of Hg mining-contaminated soils.

关键词Total Mercury And methylMercury wild Plant Species bioconcentration factors phytoremediation wastelAnds
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/42920512-1/8792
专题环境地球化学国家重点实验室
作者单位1.College of Resources and Environmental Engineering, Guizhou University, Guiyang, 550003, PR China
2.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, PR China
推荐引用方式
GB/T 7714
Xiaoli Qian;Yonggui Wu;Hongyun Zhou;Xiaohang Xu;Zhidong Xu;Lihai Shang;Guangle Qiu. Total mercury and methylmercury accumulation in wild plants grown at wastelands composed of mine tailings: Insights into potential candidates for phytoremediation[J]. Environmental Pollution,2018,239:757-767.
APA Xiaoli Qian;Yonggui Wu;Hongyun Zhou;Xiaohang Xu;Zhidong Xu;Lihai Shang;Guangle Qiu.(2018).Total mercury and methylmercury accumulation in wild plants grown at wastelands composed of mine tailings: Insights into potential candidates for phytoremediation.Environmental Pollution,239,757-767.
MLA Xiaoli Qian;Yonggui Wu;Hongyun Zhou;Xiaohang Xu;Zhidong Xu;Lihai Shang;Guangle Qiu."Total mercury and methylmercury accumulation in wild plants grown at wastelands composed of mine tailings: Insights into potential candidates for phytoremediation".Environmental Pollution 239(2018):757-767.
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