期刊
JOURNAL OF ENVIRONMENTAL SCIENCES
卷 86, 期 -, 页码 213-224出版社
SCIENCE PRESS
DOI: 10.1016/j.jes.2019.06.001
关键词
Metal organic frameworks; MIL-101(Fe); Antimonite; Antimonate; Cage windows; Steric hindrance
资金
- National Natural Science Foundation of China [41201302]
- Natural Science Foundation of Shanghai [17ZR1407000]
- Fundamental Research Funds for the Central Universities [222201514337]
We investigated the adsorption performance of five Fe-based MOFs (Fe-BTC, MIL-100(Fe), MIL-101(Fe), MIL-53(Fe) and MIL-88C(Fe)) for removal of antimonite (Sb(III)) and antimonate (Sb(V)) from water. Among these MOFs, MIL-101(Fe) exhibited the best adsorption capacities for both Sb(III) and Sb(V) (151.8 and 472.8 mg/g, respectively) which were higher than those of most adsorbents previously reported. The effect of steric hindrance was evident during Sb removal using the Fe-based MOFs, and the proper diameter of the smallest cage windows/channels should be considered an important parameter during the evaluation and selection of MOFs. Additionally, the adsorption capacities of MIL-101(Fe) for Sb(V) decreased with increasing initial pH values (from 3.0 to 8.0), while the opposite trend was observed for Sb(III). Chloride, nitrate and sulfate ions had a negligible influence on Sb(V) adsorption, while NO3- and SO42- improved Sb(III) adsorption. This result implies that inner sphere complexes might form during both Sb(III) and Sb(V) adsorption. (c) 2019 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
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