| Speciation of adsorbed arsenate on the surface of hydrous iron oxide |
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| 作者姓名： | Yongfeng JIA Xin WANG George Demopoulos |
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| 作者单位： | [1]Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China [2]Department of Mining, Metals and Materials Engineering, McGill University, Montreal, Canada |
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| 摘 要： | Adsorption of arsenate on hydrous iron oxide is an important process controlling geochemical cycling of arsenic in environment as well as the fate of arsenic-bearing mining wastes. The widely accepted view on the mechanism of adsorption is that arsenate is adsorbed via bidentate binuclear inner-sphere complexation. In this study, we characterized the arsenate-hydrous iron oxide sorption solids synthesized at pH=3-8 using Fourier transformed infrared spectroscopy （FTIR） and X-ray diffraction （XRD）. It has been determined that poorly crystalline ferric arsenate developed on the surface of iron oxide when arsenate was sorbed at acidic pH, while at alkaline pH the adsorption of arsenate was via bidentate complexation.
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| 关 键 词： | 吸附作用 水银 氧化铁 地球化学循环 |
Speciation of adsorbed arsenate on the surface of hydrous iron oxide |
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| Yongfeng JIA Xin WANG George Demopoulos.Speciation of adsorbed arsenate on the surface of hydrous iron oxide[J].Chinese Journal of Geochemistry,2006,25(B08):35-35. |
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| Abstract: | |
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| Keywords: | adsorption arsenic iron oxide speciation surface |
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