Adsorption of Antimony on Sediments from Typical Water Systems in China: A Comparison of Sb(III) and Sb(V) Pattern |
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| Authors: | Jianhong Xi Mengchang He Pengfei Wang |
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| Affiliation: | 1. State Key Laboratory of Water Environment Simulation, School of Environment , Beijing Normal University , Beijing , China;2. School of Chemistry and Environmental Engineering , Shanxi Datong University , Datong , China;3. State Key Laboratory of Water Environment Simulation, School of Environment , Beijing Normal University , Beijing , China |
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| Abstract: | The present work investigated the adsorption of Sb(III) and Sb(V) on five sediment samples (Pearl River, Yangtze River, Yellow River, Yongding River, and Liao River) from typical water systems in China and the adsorption of Sb(V) on Pearl River sediment with different organic carbon (OC) fractions using batch experiments. In order to assess the contributions of sedimentary organic components to the overall adsorption of pentavalent Sb on sediments, one sediment sample was treated by commonly used chemical and physical methods to remove different organic components. Experimental data of Sb(III) and Sb(V) adsorption on five sediments were successfully modeled using the Freundlich (r2 > 0.96) isotherm. In general, the sediments with high Fe and Al oxide contents and total organic carbon (TOC) had higher Sb(III) and Sb(V) adsorption than the sediments containing small amounts of Fe and Al oxides and TOC. Dissolved organic carbon (DOC) in sediment promoted the adsorption of Sb(V), and humin fractions and black carbon-like material in sediment had a high affinity for Sb(V). |
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| Keywords: | Sb(III) Sb(V) adsorption sediment organic carbon oxide |
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