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Shell of balanites egyptiacas to effectively eliminate arsenate of aqueous solutions

The objective of this study is the search for an adsorbent capable of removing arsenate from aqueous solutions, which can be expensive and accessible. Thus, balanite oegyptiaca shell activated carbon (CBCA) has been tested as an adsorbent for removal of arsenate ions. The effects of some experimental parameters such as contact time and solution pH on As (V) removal were investigated via batch experiments. Isotherms and adsorption kinetics have been discussed to study the effectiveness of the adsorbent. With an initial concentration of 10 mg / L of the As (V) solution, the adsorption equilibrium is reached in less than 120 minutes. The adsorption isotherms were well described by the Langmuir model and the adsorption capacity was 260 μg / g at pH 7 for CBCA. The adsorption kinetics was well adapted by the pseudo-second order model, and intraparticle diffusion was not the only limiting step in the adsorption process. Considering the Balanite oegyptiaca as waste biomass material, the biosorbent (CBCA) is promising to be exploited for applications in the treatment polluted waters containing a certain ratio of arsenic. © 2018 International Formulae Group. All rights reserved. Keywords: Arsenic adsorption, isotherm, kinetics, balanite oegyptiaca