In this study, by using coconut shell and chitosan (CS) as raw materials, mesoporous [email protected] shell-derived biochar composites ([email protected]) were prepared and were used for Cd2+ removal from aqueous solutions. The tests of SEM, BET, XRD, FTIR, and XPS were used to identify the adsorbent structure and adsorption mechanisms. Batch adsorption experiments shown that the Cd2+ adsorption by biochar was strongly dependent on the initial pH of the solution. The pseudo-second-order kinetic model and Langmuir isotherm model can describe th...
