[Preparation of Chitosan-modified Biochar and Its Adsorption Mechanism for Cd in Aqueous Solution].

Chitosan-modified biochar （CBC） was prepared as a low-cost and highly efficient adsorbent for Cd in aqueous solutions. Batch adsorption experiments were conducted to evaluate the adsorption performance. Characterization experiments with SEM-EDS， FTIR， and XPS were used to analyze the surface microstructure and chemical composition of the adsorbent.