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1 Physicochemical Problems of Mineral Processing

1 2020

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Surface modified bentonite mineral as a sorbent for Pb2+ and Zn2+ ions removal from aqueous solutions

Selim K.haled A., Rostom Merit, Youssef Mohhamed A., Abdel-Khalek Nagui A., Abdel-Khalek Mohhamed A., Hassan El-Sayed R. E.

Physicochemical Problems of Mineral Processing

2020

Vol. 56, iss. 6

145--157

Environmental pollution by lead (Pb2+) and zinc (Zn2+) ions has become an important issue due to its harmful effects on human health and environment. This work aims to evaluate the application of surface modified Egyptian bentonite mineral by acid activation using H2SO4 and thermal treatment as an adsorbent to remove lead (Pb2+) and zinc (Zn2+) ions from aqueous solution. X-ray diffraction (XRD), Fourier Transformed Infrared Spectroscopy (FTIR) and Scanning Electron Microscope (SEM) techniques were used to investigate the modified bentonite. The impact of organic and inorganic dispersants on rheological characteristics of bentonite suspensions was investigated. Adsorption of Pb2+ and Zn2+ ions using modified bentonite mineral was performed with different adsorbent doses and pH values. Removal efficiencies of lead and zinc are 99.67% and 99%, respectively with adsorbent dose of 25 g/l at pH of 6.2.