Biosorption of Hexavalent Chromium (Cr(VI)) from contaminated water using charred tea waste

Abstract

The goal of this study is to develop charred tea waste (CTW) via chemical process for the removal of Cr(VI) from contaminated water. Batch adsorption experiments were conducted as a function of pH, initial concentration, contact time and adsorbent dosage. Characterization of the adsorbent was analyzed by FT-IR and XRD. Maximum adsorption capacity (qm) of the CTW was found to be 85.32 mg/g at optimum pH 2 in 120 minutes. The adsorption on CTW was well fitted to the Langmuir isotherm and the kinetic data is consistent with the pseudo-second order kinetic model. The findings suggest that CTW could be an efficient and promising adsorbent for the removing Cr(VI) from aqueous solution.

Effective Chromium (VI) Removal from Contaminated Water by Chemically Modified Litchi Chinensis Seed Powder: Characterization, Kinetic and Isotherm Studies

“…shown to be consistent with other research that employed a variety of biomass-based adsorbents to adsorb hexavalent chromium (Bhattarai et al, 2022;Homagai et al, 2023;Rai et al, 2021). Table 1 displays the derived values for the kinetic parameters.…”

“…al., 2015). However, because of the need for costly equipment, lack of sensitivity, poor removal efficiency, and other factors, most of the preceding remedies can only be employed to a certain extent (Aryal et al, 2022;Aryal et al, 2019;Homagai et al, 2023;Saha et al, 2011). The adsorption method has become increasingly common due to the accessibility of less expensive components to produce inexpensive adsorbents (Bingol et al, 2004;Bashyal et al, 2023;Poudel et al, 2024).…”