Kinetic and Thermodynamic Influence on Adsorption of Basic Dye for Environmental Sustainability

Abstract

The rate and mechanism of pollutants removal as a means of serene environment sustainability was investigated. This was done through adsorption of Basic Blue 3 dye pollutant using environmentally friendly raw and chemically activated waste tea adsorbent. The study involved equilibrium, isotherm, kinetic and thermodynamic study of the adsorption process. The adsorption processes were best described by pseudo-second-order kinetic model; the processes were spontaneous and exothermic in nature. Intra-particle diffusion mechanism was the rate limiting step. The modified waste tea gave higher adsorption capacity (176.16 mg/g) and was faster in BB3 removal from aqueous solution than the raw waste tea adsorbent (84.74 mg/g). Waste tea adsorbent can be used to contribute immensely towards environment sustainability