Arsenic removal from water by metal-organic framework MIL-88A microrods
Hao Wu1, Meng-Dan Ma1, Wei-Zhuo Gai2
1Energy Materials & Physics Group, Department of Physics, College of Science, Shanghai University, Shanghai, 200444, China.
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.
More Related Videos
Related Concept Videos
Bonding in Metals
Alkali Metals
Table 1: Properties of the alkali metals
Metallic Solids
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
Metal-Ligand Bonds
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
Properties of Transition Metals
States of Water
Water freezes when the intermolecular forces are greater than the kinetic energy. Unlike most other substances, water is less dense in its solid state than in its liquid state. This is because each water molecule can form...


