Adsorption and recovery of hexavalent chromium from tannery wastewater over magnetic max phase composite

ABSTRACT

Magnetic max phase composite (MNPs- Ti₃AlC₂) was synthesized in the laboratory and used for the adsorption and recovery of hexavalent chromium from Tannery wastewater. Maximum adsorption of Cr (IV), about 99% was found to occur at pH 3, 100 mg adsorbent dose for 30 mL sample and 5 min vortex time in presence of various competing ions. About 98 ± 1 % of Cr (IV) was easily recovered from the adsorbent surface by alkaline leaching. The adsorption process was found to bespontaneous, endothermic, and followed pseudo second order kinetics. Longmuir and Freundlich isotherms models were also applied to the adsorption data.

KEYWORDS:

• Hexavalent Chromium
• magnetic adsorbent
• max phase
• tannery wastewater Treatment
• recovery

Acknowledgements

The authors acknowledge the technical support of Pakistan council of scientific and industrial research (PCSIR) laboratories complex, Peshawar, Khyber Pakhtunkhwa, and Centralized Resources Laboratories (CRL), University of Peshawar, Khyber Pakhtunkhwa, Pakistan.