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Ammonium thiosulphate enhanced phytoextraction from mercury contaminated soil – Results from a greenhouse study
Jianxu Wang;  Xinbin Feng;  Christopher W.N. Anderson;  Guangle Qiu;  Li Ping;  Zhengduo Bao
2011
Source PublicationJournal of Hazardous Materials
Volume186Issue:1Pages:119-127
Abstract

According to the ‘hard and soft’ acid-base principle, mercury is a ‘soft metal’ and will preferentially form soluble chemical complexes with sulphur-containing ligands. In this work mercury uptake by Chenopodium glaucum L. growing on mercury-contaminated soil was promoted using ammonium thiosulphate. The relative geochemical fractionation of mercury in the soil was subsequently investigated as a function of plant growth with and without thiosulphate amendment. The results indicate that the solubility of mercury is significantly increased through the application of thiosulphate to the soil. Substantially higher mercury levels were found in C. glaucum L. treated with 2 g kg−1 thiosulphate of soil when compared to the non-treated plants. Compared with initial soil, soluble and exchangeable fractions were increased both in planted and planted treated plants. However, no significant difference was observed between the soils of the planted and planted treated plants. The oxide-bound mercury concentration was significantly decreased for the planted soil (treated and non-treated) at the end of the experiment. Moreover, this fraction was highly correlated with the plant tissue mercury concentration. Taken together, thiosulphate assisted phytoextraction could be used to reduce environmental risk apparent for mercury-contaminated soil through reducing the oxide bound fractions, while managing the bioavailable fractions (compared with no treated plant).

KeywordAmmonium Thiosulphate Mercury Contaminated Soil Phytoextraction Fractionation Environmental Risk
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/9489
Collection环境地球化学国家重点实验室
Affiliation1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China
3.Soil and Earth Sciences, Institute of Natural Resources, Massey University, Palmerston North 4442, New Zealand
Recommended Citation
GB/T 7714
Jianxu Wang;Xinbin Feng;Christopher W.N. Anderson;Guangle Qiu;Li Ping;Zhengduo Bao. Ammonium thiosulphate enhanced phytoextraction from mercury contaminated soil – Results from a greenhouse study[J]. Journal of Hazardous Materials,2011,186(1):119-127.
APA Jianxu Wang;Xinbin Feng;Christopher W.N. Anderson;Guangle Qiu;Li Ping;Zhengduo Bao.(2011).Ammonium thiosulphate enhanced phytoextraction from mercury contaminated soil – Results from a greenhouse study.Journal of Hazardous Materials,186(1),119-127.
MLA Jianxu Wang;Xinbin Feng;Christopher W.N. Anderson;Guangle Qiu;Li Ping;Zhengduo Bao."Ammonium thiosulphate enhanced phytoextraction from mercury contaminated soil – Results from a greenhouse study".Journal of Hazardous Materials 186.1(2011):119-127.
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