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1 Physicochemical Problems of Mineral Processing

1 2021

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Exploitation of industrial solid wastes for preparing zeolite as a value-added product and its kinetics as adsorbent for heavy metal ions

Abdel-Hameed Reham Mohamed, Abdel-Aal Elsayed A., Farghaly Fatma E., Ibrahim Ibrahim A., Abdel Khalek Mohamed A., Ahmed Mohamed A., Abdel-Messih Micheal F.

Physicochemical Problems of Mineral Processing

2021

Vol. 57, iss. 1

87--99

Aluminum and fumed silica as solid industrial wastes were converted to zeolite NaPas a value-addedproduct 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°Cafter 72 hours and at 120°C after 48 hours, while it was formed after 24 honlyat 150°C. Increasing temperature and time lead to the conversion of the prismatic gibbsite crystals into plate-like structure of zeolitewhich is then formedcauliflower-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.