Using spent tea papers as low cost adsorbent to remove copper (II) from simulated wastewater; Kinetic and Equilibrium study

摘要

copper ions removing from waste water was investigated. The sorption behavior of metal ions on spenttea papers, depending on contact time, pH, and initial metal concentration was studied in batch method.The adsorption process, which is PH dependent, shows maximum removal of copper ions at pH of 6;an initial copper ion concentration of 50-250 mg, dosage of 0.25 g, and the equilibrium was reached in1 hr. The maximum efficiencies removed of Cu2+ (about 99.8%). The experimental data wereanalyzed using Langmuir, Freundlich, and Brauner, Emmett, and Teller (BET), isotherm models. Theisotherm coefficients for all these models have been determined. Langmuir isotherm expressions wereobserved to give better fit to the experimental data compared to Freundlich and BET models. Thekinetic data were assessed using Lagergren first order and pseudo second order kinetic models. Kineticdata correlated well with Lagergren first order kinetic model, showing that reversible reaction with anequilibrium being recognized between liquid and solid phase. The results indicate that spent tea paperscan be used as an efficient adsorbent for removing copper ions from waste water.