Application of the commercial anion exchange membrane for adsorptive removal of Eriochrome Black-T from aqueous solution
Muhammad Imran Khan, Noureddine Elboughdiri, Abdallah Shanableh, Mushtaq Hussain Lashari, Shabnam Shahida
Abstract
ABSTRACT This work reported batch adsorption of Eriochrome Black-T (EBT) from aqueous solution at room temperature onto the commercial anion exchange membrane (AEM) epoxypropyltrimethylammonium chloride (EPTAC). The influence of contact time, membrane dosage (amount of adsorbent), initial concentration dye solution, temperature, ionic strength and pH on adsorption capacity was investigated in detail. Adsorption isotherms including Langmuir, Freundlich, Dubinin–Radushkevich and Temkin were utilized to explore experimental results for adsorption of EBT from aqueous solution onto the commercial anion exchange membrane EPTAC. Adsorption kinetics study demonstrated that EBT adsorption onto the commercial anion exchange membrane EPTAC fitted to pseudo-second-order kinetic model. Adsorption thermodynamics investigations showed that EBT adsorption onto the commercial anion exchnage membrane EPTAC was exothermic process (Δ H ° = –34.82 kJ/mol). Moreover, the value of mean free energy ( E = 38.46 kJ/mol) from Dubinin–Radushkevich isotherm and standard enthalpy (Δ H = –34.82 kJ/mol) showed that EBT adsorption onto the commercial anion exchange membrane EPTAC was chemical adsorption process. Hence, it can be employed as an outstanding candidate for EBT removal at room temperature from aqueous solution.