Experimental and Theoretical Study to Optimize Rate Constants of Adsorption and Desorption of the Wastewater Treatment Using Waste of Tea Plant

Abstract

The present work is used to remove three multi-heavy metal components from a simulated wastewater using waste of tea (WOT). Physical, mechanical and multi-step chemical treatments were applied on the WOT as an adsorbent being used for the removal of three multi-heavy metal components from a simulated wastewater. There are new techniques of WOT adsorbents prepared for the adsorption studies, using different pH (2, 4 and 5.5). The fixed-bed column study was carried out under multilayered fixed-bed columns. It was found that the adsorption of multi-heavy metal component was significantly increased in the first layer of pH 2 removing Cr, second layer of pH 4 removing Zn and third layer of pH 5.5 removing Cu. Produce mathematical model covers the most important parameters like the effect pH, partial pressure and concentration of heavy metals effect on the rate of adsorption and desorption. Results obtained from the application of the derived model are graphically compared with experimental results, and a high degree of matching is obtained. Newton–Raphson is a numerical optimization technique used to specify the optimum values of rate constants of adsorption and desorption of the WOT for Cr, Cu and Zn to increase the performance of mathematical model. The novelty of this study is that it is used to evaluate the performance of bio-waste to remove heavy metals using more than one technique to calculate the rate constants of adsorption and desorption. Still, further studies are required to confirm with the outcomes of this study using this active technique.