THERMODYNAMICS OF BISPHENOL: A REMOVAL FROM AQUEOUS SOLUTION

Abstract

Discharge of bisphenol A (BPA) and other phenolic compounds by the industries in to water bodies has adverse effects on wildlife and human health. It is necessary to treat this wastewater before draining. The present work is evaluated the cheap and environmental technique for the removal of BPA by different adsorbents. Recent studies have been reported that the ability of Peanut husk (PH) as an adsorbent to eliminate BPA from the surface water. Study of different experimental conditions like pH (6 for native and 7 for its composites), contact time, temperature, adsorbent dose 0.05 g and initial BPA concentration (25 ppm) have been done. The pseudo second-order kinetics equations fit in the adsorption data of BPA. The Thermodynamic parameters including ΔS (entropy changes), ∆H (enthalpy change), and ΔG (Gibbs free energy change) were studied to determine the spontaneity of adsorption. The nature of adsorption is exothermic for the adsorption of BPA onto peanut husk and its composites. Adsorption data has also been analyzed by regression model.