Kinetic modeling of pH-dependent antimony (V) sorption and transport in iron oxide-coated sand
文献类型：期刊论文
| 作者 | Cai, YB; Li, LL ; Zhang, H
|
| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2015-11-01 |
| 卷号 | 138页码:758-764 |
| 关键词 | Antimony Iron oxide-coated sand Adsorption-desorption Transport |
| ISSN号 | 0045-6535 |
| 产权排序 | [Cai, Yongbing; Zhang, Hua] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai, Shandong, Peoples R China; [Cai, Yongbing] Univ Chinese Acad Sci, Beijing, Peoples R China; [Li, Lulu] Qingdao Univ, Coll Chem & Environm Engn, Qingdao, Shandong, Peoples R China |
| 通讯作者 | Zhang, H (reprint author), Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai, Shandong, Peoples R China. hzhang@yic.ac.cn |
| 英文摘要 | Understanding the mechanisms and kinetics controlling the retention and transport of antimony (Sb) is prerequisite for evaluating the risk of groundwater contamination by the toxic element. In this study, kinetic batch and saturated miscible displacement experiments were performed to investigate effects of protonation-deprotonation reactions on sorption-desorption and transport of Sb(V) in iron oxide-coated sand (IOCS). Results clearly demonstrated that Sb(V) sorption was highly nonlinear and time dependent, where both sorption capacity and kinetic rates decreased with increasing solution pH. Breakthrough curves (BTCs) obtained at different solution pH exhibited that mobility of Sb(V) were higher under neutral to alkaline condition than under acidic condition. Because of the nonlinear and non-equilibrium nature of Sb(V) retention and transport, multi-reaction models (MRM) with equilibrium and kinetic sorption expressions were utilized successfully to simulate the experiment data. Equilibrium distribution coefficient (K-e) and reversible kinetic retention parameters (k(1) and k(2)) of both kinetic sorption and transport experiment showed marked decrease as pH increased from 4.0 to 7.5. Surface complexation is suggested as the dominant mechanism for the observed pH-dependent phenomena, which need to be incorporated into the kinetic models to accurately simulate the reactive transport of Sb(V) in vadose zone and aquifers. (C) 2015 Published by Elsevier Ltd. |
| 研究领域[WOS] | Environmental Sciences & Ecology |
| 关键词[WOS] | ADSORPTION-DESORPTION ; SURFACE COMPLEXATION ; CLAY-MINERALS ; HUMIC-ACID ; SOILS ; SB(III) ; SB(V) ; ENVIRONMENT ; OXIDATION ; GOETHITE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000361772800099 |
| 源URL | [http://ir.yic.ac.cn/handle/133337/9999]  |
| 专题 | 烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室 烟台海岸带研究所_海岸带生物学与生物资源利用所重点实验室 烟台海岸带研究所_污染过程与控制实验室 |
| 推荐引用方式 GB/T 7714 | Cai, YB,Li, LL,Zhang, H. Kinetic modeling of pH-dependent antimony (V) sorption and transport in iron oxide-coated sand[J]. CHEMOSPHERE,2015,138:758-764. |
| APA | Cai, YB,Li, LL,&Zhang, H.(2015).Kinetic modeling of pH-dependent antimony (V) sorption and transport in iron oxide-coated sand.CHEMOSPHERE,138,758-764. |
| MLA | Cai, YB,et al."Kinetic modeling of pH-dependent antimony (V) sorption and transport in iron oxide-coated sand".CHEMOSPHERE 138(2015):758-764. |
入库方式： OAI收割
来源：烟台海岸带研究所
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