Exploitation of industrial solid wastes for preparing zeolite as a value-added product and its kinetics as adsorbent for heavy metal ions
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Central Metallurgical Research and Development Institute (CMRDI)
Chemistry Department, Faculty of Science, Ain shams University, Cairo, Egypt
Publication date: 2020-10-22
Corresponding author
Reham Mohamed Abdel Hameed   

Central Metallurgical Research and Development Institute (CMRDI)
Physicochem. Probl. Miner. Process. 2021;57(1):87-99
Aluminum and fumed silica as solid industrial wastes were converted to zeolite NaP as a value-added product without any template. The hydrothermal process was optimized using static autoclave. The crystallization was carried out at 100, 120 and 150C for 24, 48 and 72 h. The prepared zeolite of Si:Al ratio of 1.2 was characterized using X-ray Diffraction (XRD), Scanning Electron Microscope (SEM) provided with Energy Dispersive Spectroscopy (EDS), Surface Area, Fourier Transmitted Infra-Red (FTIR) and Thermal Analysis (TG-DSC). The crystalline phase was formed at 100C after 72 hours and at 120C after 48 hours, while it was formed after 24 h only at 150C. Increasing temperature and time lead to the conversion of the prismatic gibbsite crystals into plate-like structure of zeolite which is then formed cauliflower-like structure. The prepared zeolite was employed as adsorbent for Ni2+ and Cu2+ ions from aqueous solution. The kinetic studies of adsorption processes were performed.
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