Natural Adsorbent: Removal of Anionic surfactant from grey water and its comparison with chemical adsorbent

Abstract

The study aims at comparing removal method of Anionic Surfactant from grey water using natural and chemical adsorbent. The study focused on the comparison of various parameters of the method. The comparison was effectively done by performing batch adsorption experiment in grey water. The chemical adsorbent selected was alum and lime whereas the natural bioadsorbent was powder of karanj seed and tulsi leaves. The optimum adsorbent dose, equilibrium time, pH condition and contact time was determined. In the Batch study a series of 10 mL samples of AS bearing waste water (100 ?g mL^-1) were shaken for 1h with adsorbents at varying doses. Isotherm data at 27⁰C were fitted to Freundlich model better than to Langmuir model. The R² value for CA-1, CA-2, NA-1 and NA-2 was calculated and compared. The Q_max. for CA-1 & CA-2 ,BA-1 & BA-2 were  found to be 0.6, 0.9, 34.48 and 64.66 mg/g. Maximum adsorbent capacities (Q_max.) was obtained by the natural adsorbent than chemical adsorbent. The natural adsorbents showed very good correlation.