Electrospun metal-organic frameworks hybrid nanofiber membrane for efficient removal of As(III) and As(V) from water

静电纺丝 聚丙烯腈 金属有机骨架 吸附 纳米纤维 化学工程 砷酸盐 材料科学 朗缪尔吸附模型 化学 无机化学 纳米技术 聚合物 有机化学 复合材料 冶金 工程类 生物化学
作者
Qi Guo,Yuan Li,Xiaoyang Wei,Liwei Zheng,Zhiqiong Li,Kegang Zhang,Chun-Gang Yuan
出处
期刊:Ecotoxicology and Environmental Safety [Elsevier BV]
卷期号:228: 112990-112990 被引量:21
标识
DOI:10.1016/j.ecoenv.2021.112990
摘要

Metal-organic frameworks (MOFs) have been widely applied for pollutants removal in water. However, the powdered MOFs are always suffered from aggregation during use and difficult collection after use. These problems discount their efficiency and inhibit their reusability. In this work, Zr-based MOF (UiO-66) was successfully imprisoned into a water-stable polyacrylonitrile (PAN) substrate by electrospinning. The containing UiO-66 hybrid membrane was confirmed by instrumental characterizations and its stability was also investigated by ICP-OES analysis. The obtained composite membrane can efficiently remove both arsenite (AsIII) and arsenate (AsV) from water under natural pH conditions. The adsorption kinetic fitted well with pseudo-second-order model and was dominated by chemisorption. Its adsorption isotherm can be described by Langmuir model. The maximal adsorption capacities of the hybrid membrane for As(V) and As(III) were 42.17 mg/g and 32.90 mg/g, respectively. Our results demonstrated that the MOFs-dispersed electrospun nanofiber membrane can greatly inherit the MOFs' original adsorption properties and exhibits good regenerability without loss of MOFs. Electrospinning is an effective and practical method for the preparation of MOFs hybrid membrane, which makes the composite very easy to be collected after use.
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