Enhancing the effect of bisulfite on sequestration of selenite by zerovalent iron
文献类型：期刊论文
| 作者 | Li, JX; Wang, C; Qiao, JL; Qin, HJ; Li, LN |
| 刊名 | RSC ADVANCES
 |
| 出版日期 | 2015 |
| 卷号 | 5期号:93页码:76032—76039 |
| 关键词 | ZERO-VALENT IRON PERMEABLE REACTIVE BARRIERS WEAK MAGNETIC-FIELD CARBON-TETRACHLORIDE ARSENITE REMOVAL ELEMENTAL IRON LOW PH REDUCTION WATER KINETICS |
| ISSN号 | 2046-2069 |
| 通讯作者 | Qiao, JL (reprint author), Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resources Reuse, Shanghai 200092, Peoples R China. |
| 英文摘要 | The enhancing effect of bisulfite (HSO3-) on the kinetics of Se(IV) sequestration by zerovalent iron (ZVI) was systematically investigated as a function of headspace volume, HSO3- concentration and initial pH (pH(ini)). To exclude the role of HSO3- as an electrolyte, the kinetics of Se(IV) removal by ZVI with the presence of SO42- was determined as a control. With increasing headspace volume from 0 to 2.0 mL, the rate of Se(IV) removal by ZVI experienced a considerable enhancement whereas the further increase in the headspace volume resulted in a drop in Se(IV) removal rate. Se(IV) was always removed by ZVI with a higher rate in the presence of HSO3- than that in the presence of SO42- at various headspace volumes, which was mainly ascribed to the release of H+ and the depletion of O-2 from the oxidation of HSO3- (i.e., 2HSO(3)(-) + O-2 -> 2SO(4)(2-) + 2H(+)). Furthermore, HSO3- accelerated the reduction of ferric oxides and hydroxides to a Fe(II)-containing solid intermediate, which was beneficial to the reductive removal of Se(IV). The SEM, Fe K-edge XAFS and Se XANES analysis for Se(IV)-treated ZVI samples confirmed that HSO3- facilitated the transformation of ZVI to iron(oxyhydr)oxides (e.g., magnetite and lepidocrocite) and the reduction of Se(IV) to Se(0) compared to SO42-. The enhancing effect of HSO3- on Se(IV) sequestration varied with the concentration of HSO3- and initial pH, with the greatest effect achieved at 2.0 mM of Se(IV) and pH(ini) 5.0. Since bisulfite is inexpensive and its final product is sulfate, a common anion existing in water, taking advantage of bisulfite to enhance the ZVI's reactivity under limited oxygenated conditions is a promising method. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000361387300021 |
| 公开日期 | 2016-03-08 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/24922]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 推荐引用方式 GB/T 7714 | Li, JX,Wang, C,Qiao, JL,et al. Enhancing the effect of bisulfite on sequestration of selenite by zerovalent iron[J]. RSC ADVANCES,2015,5(93):76032—76039. |
| APA | Li, JX,Wang, C,Qiao, JL,Qin, HJ,&Li, LN.(2015).Enhancing the effect of bisulfite on sequestration of selenite by zerovalent iron.RSC ADVANCES,5(93),76032—76039. |
| MLA | Li, JX,et al."Enhancing the effect of bisulfite on sequestration of selenite by zerovalent iron".RSC ADVANCES 5.93(2015):76032—76039. |
入库方式： OAI收割
来源：上海应用物理研究所
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