Experimental investigations of hazardous leather industry dye (Acid Yellow 2GL) removal from simulated wastewater using a promising integrated approach

Abstract

The present investigation describes the use of bioadsorbent, ozonolysis, and integrated process (ozone integrated with bioadsorbent) treatment for leather industrial dye (Acid Yellow 2GL) removal from simulated wastewater. The morphological characterization of agriculturally based, chemically activated bioadsorbent was presented using SEM, FTIR, XRD, and BET analysis which suggested the high potential of the adsorbent for the removal from leather industry effluent. Maximum Acid Yellow 2GL removal of 98.3 ± 2.3% by integrated treatment was achieved at 30 min, bioadsorbent dose of 3 g/L and pH 7.5. Adsorption isotherms and kinetic models were measured for the validation of bioadsorption process for removal of dye. Langmuir's isotherm was best fitted for Acid Yellow 2GL dye sorption in comparison to Freundlich isotherm. The phytotoxicity analysis of treated effluent ensured that the integrated process could be a prospective candidature for the treatment of dyeing effluent from the leather industry. © 2021 The Institution of Chemical Engineers