Aggregation and Dissociation of Aqueous Al-13 Induced by Fluoride Substitution
文献类型：期刊论文
| 作者 | Xu, Xiufang; Wang, Xiao; Zhang, Gong; Fu, Xiaoning; Hu, Chengzhi; Liu, Ruiping; Liu, Huijuan; Qu, Jiuhui |
| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2017-06-06 |
| 卷号 | 51期号:11页码:6279-6287 |
| 英文摘要 | The epsilon-Keggin ion AlO4Al12(OH)(24)(H2O)(12)(7+) (epsilon-K Al-13(7+)) is a double-edged sword, because it commonly acts as a toxic component toward aquatic organisms, but also is considered to be an effective coagulant. Gaining deep insight into the transformation of epsilon-K Al-13(7+) in the presence of coexisting ligands would have significant implications for water environmental science, as well as for practical water purification. The aggregation and dissociation of aqueous Al-13(7+) induced by fluoride (F-) substitution were herein investigated using nuclear magnetic resonance, electrospray ionization-mass spectrometry, and theoretical calculations. The F- substitution on eta-OH2 sites was extremely fast, reducing the charge of epsilon-K Al-13(7+) so that the repulsive force between fluorinated Al-13 species was immediately reduced. Consequently, fluorinated Al-13 aggregated, with the formula [Al13F5](2+), which was demonstrated by calculating the Gibbs free energy changes (Delta(r)G) of the substitution reactions involved. Moreover, the replacement of eta-OH2 with F- weakened the strength of Al-OHa/b bonds and thus prompted the replacement of mu-OHa/b with F-. In addition, fluorination prompted [Al13F5](2+) to dissociate to oligomers. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/39473]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Xu, Xiufang,Wang, Xiao,Zhang, Gong,et al. Aggregation and Dissociation of Aqueous Al-13 Induced by Fluoride Substitution[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2017,51(11):6279-6287. |
| APA | Xu, Xiufang.,Wang, Xiao.,Zhang, Gong.,Fu, Xiaoning.,Hu, Chengzhi.,...&Qu, Jiuhui.(2017).Aggregation and Dissociation of Aqueous Al-13 Induced by Fluoride Substitution.ENVIRONMENTAL SCIENCE & TECHNOLOGY,51(11),6279-6287. |
| MLA | Xu, Xiufang,et al."Aggregation and Dissociation of Aqueous Al-13 Induced by Fluoride Substitution".ENVIRONMENTAL SCIENCE & TECHNOLOGY 51.11(2017):6279-6287. |
入库方式： OAI收割
来源：生态环境研究中心
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