Mohamed F Cheira
Nuclear Materials Authority, Egypt
Title: Removal of Pb2+, Ni2+, Cd2+, Zn2+ from wet process phosphoric acid by mueroxide impregnated activated bentonite
Biography
Biography: Mohamed F Cheira
Abstract
The harmful inorganic impurities in wet process phosphoric acid are essentially removed by a simple and inexpensive method for environment applications. In this work, the highly efficient removal of Pb2+, Ni2+, Cd2+ and Zn2+ cations ( >99%) from WPPA were investigated through a batch technique using mueroxide impregnated activated bentonite. The used adsorbent was prepared within a dry method. The experimental data showed high adsorption capacity of mueroxide impregnated activated bentonite toward Pb2+, Ni2+, Cd2+, and Zn2+ cations into its active sites as 170, 115, 143 and 190 mg/g at 5 M acid concentration, respectively. Moreover, most of the heavy metals were completely adsorbed from WPPA (>98%) at 5 M acid concentration. The providing data indicated that the batch sorption technique retained its functionality to effectively remove Pb2+, Ni2+, Cd2+ and Zn2+ cations even after six reuse/cycles, where the mueroxide impregnated activated bentonite can be regenerated using HCl. The real impurities removal from the Abu Zabaal wet process phosphoric acid using the adsorbent was assessed through the proposed protocol under optimum conditions.