Selenium speciation in seleniferous agricultural soils under different cropping systems using sequential extraction and X-ray absorption spectroscopy | |
Hai-BoQin; Jian-MingZhu; Zhi-QingLin; Wen-PoXu; De-CanTan; Li-RongZheng; YoshioTakahashi | |
2017 | |
Source Publication | Environmental Pollution
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Volume | 225Pages:361-369 |
Abstract | Selenium (Se) speciation in soil is critically important for understanding the solubility, mobility, bioavailability, and toxicity of Se in the environment. In this study, Se fractionation and chemical speciation in agricultural soils from seleniferous areas were investigated using the elaborate sequential extraction and X-ray absorption near-edge structure (XANES) spectroscopy. The speciation results quantified by XANES technique generally agreed with those obtained by sequential extraction, and the combination of both approaches can reliably characterize Se speciation in soils. Results showed that dominant organic Se (56-81% of the total Se) and lesser Se(IV) (19-44%) were observed in seleniferous agricultural soils. A significant decrease in the proportion of organic Se to the total Se was found in different types of soil, i.e., paddy soil (81%) > uncultivated soil (69-73%) > upland soil (56-63%), while that of Se(IV) presented an inverse tendency. This suggests that Se speciation in agricultural soils can be significantly influenced by different cropping systems. Organic Se in seleniferous agricultural soils was probably derived from plant litter, which provides a significant insight for phytoremediation in Se-laden ecosystems and biofortification in Se-deficient areas. Furthermore, elevated organic Se in soils could result in higher Se accumulation in crops and further potential chronic Se toxicity to local residents in seleniferous areas. |
Keyword | Selenium Speciation Fractionation Sequential Extraction X-ray Absorption Near-edge Structure (Xanes) Seleniferous Agricultural Soils |
Indexed By | SCI |
Language | 英语 |
Document Type | 期刊论文 |
Identifier | http://ir.gyig.ac.cn/handle/42920512-1/7762 |
Collection | 环境地球化学国家重点实验室 |
Affiliation | 1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China 2.Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan 3.State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China 4.Environmental Sciences Program and Department of Biological Sciences, Southern Illinois University, Edwardsville, IL 62026-1099, USA 5.University of Chinese Academy of Sciences, Beijing 100049, China 6.Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China |
First Author Affilication | 中国科学院地球化学研究所 |
Corresponding Author Affilication | 中国科学院地球化学研究所 |
Recommended Citation GB/T 7714 | Hai-BoQin;Jian-MingZhu;Zhi-QingLin;Wen-PoXu;De-CanTan;Li-RongZheng;YoshioTakahashi. Selenium speciation in seleniferous agricultural soils under different cropping systems using sequential extraction and X-ray absorption spectroscopy[J]. Environmental Pollution,2017,225:361-369. |
APA | Hai-BoQin;Jian-MingZhu;Zhi-QingLin;Wen-PoXu;De-CanTan;Li-RongZheng;YoshioTakahashi.(2017).Selenium speciation in seleniferous agricultural soils under different cropping systems using sequential extraction and X-ray absorption spectroscopy.Environmental Pollution,225,361-369. |
MLA | Hai-BoQin;Jian-MingZhu;Zhi-QingLin;Wen-PoXu;De-CanTan;Li-RongZheng;YoshioTakahashi."Selenium speciation in seleniferous agricultural soils under different cropping systems using sequential extraction and X-ray absorption spectroscopy".Environmental Pollution 225(2017):361-369. |
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