Journal Article

Arsenic removal from water by metal-organic framework MIL-88A microrods

Meng-Dan Ma, Zhen-Yan Deng, Wei-Zhuo Gai, Jian-Ge Zhou, Hao Wu, Pingguang Xu, Hongxun Yang, Zhenxiang Cheng

2018

Overview

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.

• Publisher: Springer Science and Business Media LLC,Springer Berlin Heidelberg,Springer Nature B.V
• Subject: adsorbents / Adsorption / Aquatic Pollution / Arsenic / Arsenic - chemistry / Arsenic removal / coordination compounds / Diffusion / Diffusion models / Diffusion rate / Earth and Environmental Science / Ecotoxicology / Engineering / Environment / Environmental Chemistry / Environmental Health / Environmental science / hot water treatment / Iron / Kinetics / Metal-Organic Frameworks / Metal-Organic Frameworks - chemistry / microstructure / Organic chemistry / Physical Sciences and Mathematics / Pollutant removal / Research Article / sorption isotherms / Waste Water Technology / Water Management / Water Pollutants, Chemical / Water Pollutants, Chemical - chemistry / Water Pollution Control / Water Purification / Water Purification - methods