Abstract
The proteins and polysaccharides are always remained in the effluent of biotreated process, which leads to further pollution for advanced treatment or aqueous environment. In this study, Fe3O4/polynailine composite (Fe3O4@PANI) was prepared by means of in situ surface polymerization, and was used as the adsorbent for removal of proteins and polysaccharides from biotreated wastewater. The removal rate of polysaccharide by PANI (69.43%) was higher than that by Fe3O4@PANI (61.33%), while the removal percentage of protein by Fe3O4@PANI (65.25%) was higher than that by original PANI (47.56%). The adsorption process was fitted well with the quasi-first-order kinetic and Langmuir isotherm models. Finally, it was determined that electrostatic attraction is the primary mechanism for the adsorption of proteins and polysaccharides by PANI-based materials.