Removal of antimonite and antimonate from water using Fe-based metal-organic frameworks: The relationship between framework structure and adsorption performance

被引：49
作者：
Zhang, Wei [1 ,2 ,3 ]
Li, Na [1 ,2 ,3 ]
Xiao, Ting [1 ,2 ,3 ]
Tang, Wenting [1 ,2 ,3 ]
Xiu, Guangli [1 ,2 ,3 ]
机构：
[1] East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China
[2] Tongji Univ, Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China
[3] East China Univ Sci & Technol, Shanghai Environm Protect Key Lab Environm Stand, Shanghai 200237, Peoples R China
来源：
JOURNAL OF ENVIRONMENTAL SCIENCES | 2019年 / 86卷
基金：
上海市自然科学基金; 中国国家自然科学基金;
关键词：
Metal organic frameworks; MIL-101(Fe); Antimonite; Antimonate; Cage windows; Steric hindrance; AQUEOUS-SOLUTION; ZIRCONIUM-OXIDE; CU-BTC; SB(V); SB(III); IRON; MIL-100(FE); SURFACE; OXIDATION; ANTIMONY(III);
D O I：
10.1016/j.jes.2019.06.001
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
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.
引用
收藏
页码：213 / 224
页数：12
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