Abstract: Using the surface molecular imprinting technology, the Ag+-imprinted biosorbent for treatment of the wastewater contaminated by Ag+ was prepared, which showed higher adsorption affinity and selectivity for the imprinting ion (Ag+) than the other non-imprinting metal ions. Batch adsorption experiments were carried out as a function of imprinted Ag+ concentration, agitation time, temperature and initial Ag+ concentration. The optimal imprinted Ag+ concentration for preparing Ag+-imprinted biosorbent was 2.0ámg/g (biomass). The maximum adsorption capacity was 199.2ámg/g at the initial Ag+ concentration of 1200.0ámg/L and the biosorbent dosage of 3.0ág/L, which was much higher than that of previous work. The reaction temperature showed little effect on the adsorption process. The biosorbent could be easily desorbed by using 0.1áM Na2S2O3 solution as a desorbent at room temperature (25.0-27.0á¦C). The SEM showed that noble metal silver could be well adsorbed by the biosorbent; the silver nanoparticles were of regular geometry shape and relatively uniform
Template and target information: silver ion, Ag+
Author keywords: molecular imprinting, Ag+, adsorption, Desorption, Waste-water treatment, affinity