Sorption affinities of chromium on natural phosphate and its derivative hydroxyapatite

10^th World Congress on Medicinal Chemistry and Drug Design

June 14-15, 2018 | Barcelona, Spain

Kenza Fanidi

Mohammed V University, Morocco

Posters & Accepted Abstracts: Med chem (Los Angeles)

Abstract :

Moroccan natural phosphate and its converted hydroxyapatite were used to develop an effective adsorbent suitable for the removal of trivalent and hexavalent chromium from aqueous solution. The converted hydroxyapatite was prepared from natural phosphate and characterized using various techniques of characterization. Thus, the adsorption of Cr (III) and Cr2O72- ions were investigated to understand the adsorptive selectivity of two chromium oxidative degrees on natural phosphate and its derivative apatite using batch system at room temperature. The sorption results showed a high affinity of natural phosphate for the Cr2O72- than c-HAP contrary to Cr (III) adsorption related to the presence of silica groups present in natural phosphate while the converted apatite has a good affinity for Cr (III) ions. The adsorption behavior of both adsorbent fitted the Langmuir and Freundlich isotherm models implying that the adsorption mostly occurred through a heterogeneous binding of metal to the surface of the adsorbent.