An Efficient and Low-Cost Indigenous Material for Removal of Hexavalent Chromium from Industrial Effluents
Detoxification of Hexavalent Chromium from Effluents
An indigenous biosorbent originated from orange peel was scrutinized the remediation of hexavalent chromium (Cr+6) from industrial effluents. The analytical influences of different biosorption parameters such as biosorbent dosage, contact time, Cr+6 concentration, pH and temperature were also studied. The physical modeling study revealed that the biosorption of Cr+6 on orange peel biosorbent (OPB) followed the rate of kinetic pseudo second order with a multilayer biosorption. Meanwhile, the estimated mean sorption energy (E) indicated the chemisorption surface mechanism for the biosorption of Cr+6 on the surface of OPB. The thermodynamic changes of Gibbs free energy, enthalpy and entropy showed a spontaneous and exothermic biosorption of Cr+6 onto the OPB. The studied material of OPB showed an efficient removal of Cr+6 from collected industrial effluents with % biosorption Cr+6 up to 94%. The experimental adsorption capacity of Cr+6 on OPB is 0.222 mmol/g with negligible interference. The proposed OPB is found to be an economical biosorbent for the efficient removal of Cr+6 ions and successfully applied on different industrial effluents with biosorption > 94%.