Abstract
Polyvinylbenzene (PVB, namely polystyrene, PSt) was grafted on the surface of silica gel particles by “grafting from” in solution polymerization system, and grafting particles PVB/SiO 2 were obtained. The chloromethylation reaction of the grafted polyvinylbenzene was performed using a novel chloromethylation reagent, 1,4-bis (chloromethyoxy) butane that is un-carcinogenic, and grafting particles CMPVB/SiO 2 were obtained. Subsequently, chloromethyl groups on grafting particles CMPVB/SiO 2 were hydrolyzed and oxidized, and finally adsorption material polyvinylbenzyl acid/SiO 2 (PVBA/SiO 2) was prepared. The adsorption performances and mechanism of 2,4,6-trinitrotoluene (TNT) on PVBA/SiO 2 were investigated through static methods. The experimental results showed that PVBA/SiO 2 possessed strong adsorption ability for TNT with adsorption amount of 26.84 mg g −1. The empirical Freundlich isotherm was also found to agree well with the equilibrium adsorption data. In addition, pH was found to have great influence on the adsorption amount. Finally, PVBA/SiO 2 was observed to possess excellent reusability as well.
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