Synthesis of Zeolitic Imidazolate Framework ZIF-8 Membranes Supported on α-Alumina for Seawater Desalination
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1Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, Iran
2Faculty of Chemistry and Chemical Engineering, Malek Ashtar University of Technology, Tehran, Iran
In recent years, much attention has been paid to the desalination of natural water resources such as seawater in order to solve the water shortage problem. ZIF-8 membranes are known to be highly stable in aqueous environments and thus a suitable candidate for desalination process. In this study, ZIF-8 membranes were synthesized on the 3-aminopropyltriethoxysilane (APTES) modified α-alumina tubes using an in-situ solvothermal synthesis method for desalination by reverse osmosis. The synthesized membrane was characterized using X-ray diffraction (XRD), Field emission scanning electron microscopy (FE-SEM), N2 adsorption-desorption (BET) analysis. Sodium chloride and calcium chloride feeds with different concentrations were used for desalination test. The rate of ions separation in the 0.3 M sodium chloride and calcium chloride feeds, at about 30 min of the process, was about 93% and 95%, respectively, as well as the permeability of the two feeds, on average, 25 and 13 kg.m-2.h-1 measured.