Modification of jute and its adsorption behavior for copper ions

Based on the actual demand of disposing surface water sudden pollution and the on-site practicability of fiber material, this study investigated the adsorption capacityof modifiedjute synthesizedby pyromellitic dianhydride. In addition, the modification conditions were optimized through the orthogonal experiment and the adsorption isotherm, kinetics and thermodynamics were evaluated. The results showed that the adsorption capacity of modified jute was significantly influenced by the ratio of reactants (jute and anhydride) and reaction temperature, and was 43.56 mg/g at room temperature and pH of 5~7. Interestingly, the adsorption capacity of modified jute was seven times higher than that of raw jute. The adsorption behavior of modified jute can be described by Langmuir model which means the single-molecular layer adsorption. The thermodynamic parameters demonstrated that the adsorption was a spontaneous endothermic process which agreed with the pseudo-second-order equation.