Abstract:The clay-biochar adsorbent(SBEC) and the clay carbon-based adsorbent (SBE) were prepared using spent bleaching earth and durian shell for hexavalent chromium removal from wastewater. The structure of the adsorbents were characterised by SEM,FTIR, XRD and BET. The influence of variables like initial metal loading, pH, contact time, and adsorbent dose were studied. Results showed maximum removal efficiency for Cr(VI) at 120 min contact time, adsorbent dose of 0.5 g/L and pH 3 by SBEC and pH 2 by SBE. Pseudo-second-order kinetics was the most suitable model for the removal of chromium. Freundlich isotherm model showed fit to SBEC and Langmuir model fitted to SBE. The interaction of SBEC and SBE with the simulated wastewater was spontaneous and endothermic interaction. The adsorption efficiency of SBEC was 58.8% after five adsorption-desorption tests.