Porous polymer magnetic adsobents for dye wastewater treatment

Abstract

Abstract The recent decade has witnessed adsorption technology emerging as an advanced dye wastewater treatment method with great potential and a grand blueprint, in which the specific surface area and active sites of the adsorbent are considered to be the two most important characteristics largely impacting the adsorption performance. Therefore, two kinds of magnetic porous adsorbents (HSF and HSVF) with different specific surface areas and activity sites were fabricated. Both of them exhibit excellent performance with remarkable adsorption capacities for negative dye Sunset yellow (SY). Furthermore, their adsorption kinetic and isotherm were further studied and compared in detail. The results revealed that introducing strong active sites could improve the adsorption capacity and rate effectively even though sacrificing part of specific surface areas, indicating that active sites might play a dominant role during the dye adsorption process. Multiple interactions introduced by the pyridine functional group in the sample HSVF also showed synergistic effects. In addition, the adsorbents could be recycled rapidly by magnetism, which exhibited the advantages of easy-operation.