USE OF TANNERY SOLID WASTE TO TREAT CHROMIUM (VI) IN TANNING EFFLUENT.

Abstract

Abstract In recent years, resource recovery from biomass and its application in water treatment has attracted a wide range of researchers. Therefore, the current study examines the usefulness of leather shaving waste being obtained from the tanning industry, for evaluating its effectiveness towards adsorption of chromium (VI) from liquid effluent. In addition, the adsorption experiments were performed by changing the pH, concentration of Cr (VI) and contact time in order to evaluate the sorption potential of chromium towards treated bio-char. The results indicated that bio-char can be obtained from leather shaving waste and its thermochemical treatment enhance the adsorption potential of chromium towards its surface sites. The pH effect on the Cr (VI) adsorption onto treated bio-char was found insignificant. The various study on the adsorption isotherm and kinetic indicated the adsorption of Cr (VI) onto treated bio-char followed Freundlich isotherm and Pseudo second-order model. Furthermore, the treated bio-char may be effectively applied for the Cr (VI) removal from tanning effluent with strong adsorption potential. In general, this study further supports the cost-effectiveness of prepared bio-char and its application in the removal of other heavy metals in water/wastewater treatment applications.