The document summarizes research on using chitosan to remove copper from wastewater. Chitosan is a biopolymer that can effectively sorb and remove copper. The study found that copper removal by chitosan increased with contact time until equilibrium was reached at 140 minutes. Copper removal also increased with increasing copper concentration and temperature, indicating the process is endothermic. Kinetic data showed the removal follows first-order kinetics. Thermodynamic calculations found the process is spontaneous with increasing temperature based on negative Gibbs free energy values and positive enthalpy changes. Copper uptake increased with increasing pH from 2 to 6.5. Overall, the research demonstrates chitosan is an effective and low-cost adsorb