| Redox potential E_H [Se(VI)/Se(IV)] of aqueous extractof soils from Yongshou Kaschin-Beck diseaseregion and the influence by humic acid |
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| 作者姓名： | Peng An and Xu Langqiu Research Center for Eco-Environmental Sciences Academia Sinica Beijing China |
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| 作者单位： | Peng An and Xu Langqiu Research Center for Eco-Environmental Sciences，Academia Sinica，Beijing 100083，China |
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| 摘 要： | The relation between EH Se(VI)/Se(IV)] and pH of soil aqueous extract in Kaschin-Beck disease region and the effects of natural redox agents, namely humic substances, MnO2 and Fe2+, on the redox property of the system were studied. The results indicated that both humic acid and Fe2+ could enhance the reducibility of Se(VI) and MnO2, a limited oxidizability for Se(IV). Fe2+ showed a weak reducibility only at low pH value. The reducibilities of three sulfur-containing compounds for Se(VI) were in following order:thioglycollic acid > L-cysteine > sulfide
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Redox potential E_H [Se(VI)/Se(IV)] of aqueous extractof soils from Yongshou Kaschin-Beck diseaseregion and the influence by humic acid |
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| Peng An and Xu Langqiu Research Center for Eco-Environmental Sciences,Academia Sinica,Beijing ,China.Redox potential E_H [Se(VI)/Se(IV)] of aqueous extractof soils from Yongshou Kaschin-Beck diseaseregion and the influence by humic acid[J].Journal of Environmental Sciences,1989(2). |
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| Authors: | Peng An and Xu Langqiu Research Center for Eco-Environmental Sciences Academia Sinica Beijing China |
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| Institution: | Peng An and Xu Langqiu Research Center for Eco-Environmental Sciences,Academia Sinica,Beijing 100083,China |
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| Abstract: | The relation between EH Se(VI)/Se(IV)] and pH of soil aqueous extract in Kaschin-Beck disease region and the effects of natural redox agents, namely humic substances, MnO2 and Fe2+, on the redox property of the system were studied. The results indicated that both humic acid and Fe2+ could enhance the reducibility of Se(VI) and MnO2, a limited oxidizability for Se(IV). Fe2+ showed a weak reducibility only at low pH value. The reducibilities of three sulfur-containing compounds for Se(VI) were in following order:thioglycollic acid > L-cysteine > sulfide |
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| Keywords: | selenium redox potential Kaschin-Beck disease humic acid |
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