%K Adsorption; Adsorption isotherms; C (programming language); Crystalline materials; Kinetics; Network function virtualization; Organometallics; Scanning electron microscopy; Solutions; Spectrometers; X ray diffraction, Adsorption kinetics; Arsenite; Field emission scanning electron microscopes; Metal organic framework; Pseudo-second-order kinetic models; Scanning electronic microscopes; X-ray energy dispersive spectrometers; Zeolitic imidazolate frameworks, Thermogravimetric analysis
%J Journal of Molecular Liquids
%L scholars10929
%A A.M. Nasir
%A N.A.H. Md Nordin
%A P.S. Goh
%A A.F. Ismail
%I Elsevier B.V.
%P 269-277
%X Two-dimensional leaf-shaped zeolitic imidazolate framework (ZIF-L) was synthesized in aqueous solution by using zinc salt and 2-methylimidazole (2-MeIM) at room temperature. The synthesized ZIF-L shows unique two-dimensional (2-D) leaf-like crystal morphology using field emission scanning electron microscope. The crystalline structure and total surface area of ZIF-L was indicated by X-ray diffraction, thermogravimetric analysis and Brunauer�Emmett�Teller analysis. The experimental data of adsorption of arsenite by ZIF-L were well fitted by two-site- pseudo-second-order kinetic model. The adsorption isotherms were well described by Freundlich isotherm model. The synthesized ZIF-L possess maximum uptake of arsenite was 43.74 mg/g at pH 10.0 at the room temperature (25.0 ± 1 °C) which is relatively higher than other class of metal-organic framework. Zeta potential, fourier transform infrared, and scanning electronic microscope combined with X-ray energy dispersive spectrometer concluded that adsorption mechanism of arsenite on ZIF-L was occurred based on electrostatic interaction between arsenite ions and surface charge of ZIF-L, also substitution of hydroxyl group by arsenite to form inner-sphere complex. Since the development of ZIF-L through aqueous media was rapid, simple and eliminated the heating process, ZIF-L can be regarded as a promising adsorbent and low-cost adsorbent for the removal of arsenite. © 2017 Elsevier B.V.
%R 10.1016/j.molliq.2017.12.005
%V 250
%T Application of two-dimensional leaf-shaped zeolitic imidazolate framework (2D ZIF-L) as arsenite adsorbent: Kinetic, isotherm and mechanism
%O cited By 89
%D 2018