Sorption of chromium (VI) from electroplating rinse water by strong base anion exchanger: equilibrium and kinetic studies

Abstract

Static-batch experiments are conducted to remove Chromium (VI) from rinse waters of electroplating bath on strong base anion exchanger Tulsion A-62 and results are depicted with respect to Chromium (VI) ions concentration, contact time and solution pH. The equilibrium state is established after 300 minutes of phase contact. As the adsorption process is a pH dependent, indicated the maximal removal of Chromium (VI) in the pH 6.0-7.0. The anion exchange resin is characterized by SEM with EDX and FTIR analysis. The equilibrium data for adsorption of Chromium (VI) was fitted with Langmuir and Freundlich models. The adsorption process followed reversible first order kinetics. Reports concluded that such anion exchangers could be used for the systematic removal of Chromium (VI) ions from water and wastewater.