Ammonium thiosulphate enhanced phytoextraction from mercury contaminated soil - Results from a greenhouse study

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	Ammonium thiosulphate enhanced phytoextraction from mercury contaminated soil - Results from a greenhouse study
	Jianxu Wang; Zhengduo Bao; Li Ping; Guangle Qiu; Christopher W.N.Anderson; Xinbin Feng
刊名	Journal of Hazardous Materials
	2011
卷号	186 期号:1 页码:119-127
关键词	Ammonium Thiosulphate Mercury Contaminated Soil Phytoextraction Fractionation Environmental Risk
英文摘要	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).
学科主题	环境地球化学
语种	英语
公开日期	2017-12-29
内容类型	期刊论文
源URL	[http://ir.gyig.ac.cn:8080/handle/352002/7013]
专题	地球化学研究所_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
推荐引用方式 GB/T 7714	Jianxu Wang,Zhengduo Bao,Li Ping,et al. 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,Zhengduo Bao,Li Ping,Guangle Qiu,Christopher W.N.Anderson,&Xinbin Feng.(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,et al."Ammonium thiosulphate enhanced phytoextraction from mercury contaminated soil - Results from a greenhouse study".Journal of Hazardous Materials 186.1(2011):119-127.