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- Title
Arsenic removal from water by metal-organic framework MIL-88A microrods.
- Authors
Wu, Hao; Ma, Meng-Dan; Gai, Wei-Zhuo; Yang, Hongxun; Zhou, Jian-Ge; Cheng, Zhenxiang; Xu, Pingguang; Deng, Zhen-Yan
- Abstract
Fe-based metal-organic framework MIL-88A microrods were synthesized by hydrothermal method, which were used to adsorb As(V) in water for the first time. The experimental results indicated that MIL-88A has a very fast adsorption rate towards arsenic in water. The kinetic and isothermal data for arsenic removal were better fitted to the pseudo-second-order kinetic model and Langmuir model, respectively, implying a chemical and monolayer adsorption for As(V) on MIL-88A microrods. Two rate-controlling processes during adsorption were revealed by the intraparticle diffusion model. The maximum adsorption capacity of MIL-88A reached 145 mg g−1, higher than those of Fe-based MIL adsorbents reported previously, which probably originates from its unique microstructure with abundant OH− groups and an unusual large swelling towards water. These show that Fe-based MIL-88A is a good candidate for arsenic removal.
- Subjects
ARSENIC removal (Water purification); METAL-organic frameworks; HYDROTHERMAL synthesis; ADSORPTION (Chemistry); LANGMUIR isotherms
- Publication
Environmental Science & Pollution Research, 2018, Vol 25, Issue 27, p27196
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-018-2751-2