Adsorptive removal of Cr (vi) onto Xanthated tea waste from aqueous solution

Abstract

Removal of heavy metals is absolutely essential to avoid water pollution. In the present study, an efficient and cost-effective absorbent was prepared by chemical modification of tea waste. The adsorbent was characterized by FTIR and XRD techniques. Batch adsorption experiments were performed in order to examine the removal process under various factors like the effect of initial concentration, adsorbent dose, pH, and contact time. The adsorption of Cr (VI) was found to be optimum at a contact time of 120 min, pH 2.0, and an adsorbent dose of 100 mg/L. The isotherm study revealed that the adsorption equilibrium was well-fitted to the Langmuir isotherm. The results showed that XTW was a favorable adsorbent of Cr (VI) from an aqueous solution.