A comparative study on removal of As(III) from industrial wastewater using newly synthesized polysaccharide-based chelating resins

Abstract

Water contamination by a wide range of hazardous substances including heavy metals, metalloids, and dyes is a major environmental concern due to their potential human toxicity. Therefore, technologies for the removal of harmful contaminants in wastewater have been developed substantially. Among all the methods that have been proposed, ion exchange and adsorption processes are the most efficient techniques for removal of contaminants from industrial wastewater and very important tools for environmental protection also. In this study, we focus on removing As(III) by applying an ion exchange mechanism using TKP (Tamarind kernel powder) and CCSP (Citrullus Colocynthis seed powder) based chelating resin. FTIR spectra & SEM analysis confirm the functional groups and structure of newly synthesized resins subsequently. With the use of the Langmuir and Freundlich isotherm models, the interaction of metalloid ion with chelating resin has been evaluated. Effects of various parameters like contact time, chelating resin dosage, metalloid ion concentration, and pH on removal efficiency are also discussed. The maximum removal efficiencies of TTABA (Tamarind Triazine Amino Butanedioic Acid) resin and CTABA (Citrullus Triazine Amino Butanedioic Acid) resin have been observed as 82.3% and 75.6%, respectively, for As(III).