Removal of eosin yellow from wastewaters by the commercial anion exchange membrane BI

Abstract

ABSTRACT This article reports usage of the commercial anion exchange membrane BI as extraordinary adsorbent for the removal of eosin yellow from wastewater at room temperature. The dependence of percentage removal of eosin yellow on operating parameters was explored. The eosin yellow percentage removal was enhanced from 17% to 98%, 3% to 99.65% and 81% to 96% with increase in contact time, mass of anion exchange membrane BI and temperature while decreased from 95% to 31% with increase in initial concentration of eosin yellow. Experimental data was explored by employing non-linear adsorption kinetics models and non-linear adsorption isotherms. Adsorption kinetics study showed that eosin yellow adsorption onto anion exchange membrane BI fitted to non-linear pseudo-second-order model. Moreover, eosin yellow adsorption onto anion exchange membrane BI followed non-linear Langmuir isotherm with lower value of chi-square test (χ 2 = 3.442 x 10 -11 ). Thermodynamics study represented that eosin yellow adsorption was an endothermic process.