Synthesis of ethylamine-bridged β-cyclodextrins and adsorption properties of thorium

A specialized ethylamine-bridged beta-cyclodextrins (EB beta-CD) was synthetized. EB beta-CD's adsorption properties of thorium ions were performed. Experimental results show that the adsorption of thorium using the EB beta-CD can achieve equilibrium within 60 min at room temperature under the condition of pH 4, the adsorbance is 10.49 mg g(-1). The results of SEM and BET nitrogen adsorption show that, EB beta-CD is typical mesoporous material. According to pseudo-second-order kinetics, the adsorption of Th(IV) indicating the influence of textural properties of EB beta-CD on the rate of adsorption. The thermodynamic parameters obtained showed that the adsorption process is exothermic, spontaneous process.