Porogen influence on the adsorption performance of weak acid resins for Cu~(2+) removal

摘要

Two weak acid resins (WT-1, WT-2) with different pore structures were prepared through suspension polymerization from methyl acrylate (MA) and divinylbenzene (DVB). Cu~(2+) was employed as the adsorbate and bath experiments were carried out to investigate the adsorption performance of the two resins. The addition of porogen (toluene) enlarged the exchange capacity, specific surface area and average pore diameter of resins, leading to the faster adsorption rate and higher maximum adsorption capacity. The adsorption capacity increased 3.5-28.5% with the rise of porogen/monomer ratio from 0 to 30%. This work shows the porogen influence on the adsorption kinetics and thermodynamics of weak acid resins.