| Along with the rapid development of nuclear technique, a large of radioactive wastehas been discharged inevitably. This will bring seriously pollution for ecology andenvironment around. Thus, how to deal with radioactive waste water has become one ofthe main tasks of environment management at present. Molecular imprinting technologywith high selectivity and affinity that appears as a new and potential separation techniquein recent years has now attracted many people’s attention in many fields. This paper isfocused on the problem of selective separation and enrichment of the waste watercontaining Uranium (Ⅵ), Strontium (Ⅱ) and Cs (Ⅰ) ion by means of the molecularimprinting technique. The main work is as follows:Uranium (VI) and Cs (Ⅰ) ion-imprinted polymers were prepared by bulkpolymerization using uranium (VI) and Cs (Ⅰ) ion as template ion, Uranium (VI) and Cs(Ⅰ)-4-vinyl pyridine (4-VP) salicylaldoxime complex as a function monomer, in2-methoxy ethanol, ethylene glycol dimethacrylate as cross-linking monomer, and2,2′-azobisisobutyronitrile as initiator. The adsorption, selectivity and repetition of the twomolecularly imprinted polymer for Uranium (VI) and Cs (Ⅰ) ion in the water is explored.The factors that are expected to have effect on the adsorption ability of ion imprintedpolymers, such as pH, adsorption time, solution concentration, are systematicallyinvestigated. Moreover, the adsorption isothermal curve and kinetic curve is alsoresearched. The ion-imprinted polymers are characterized by scanning electron microscope,FT-IR and X-ray EDS. The results show that the present Uranium (VI) and Cs (Ⅰ)ion-imprinted polymers afford good thermal stability, high adsorption capacity compared with the none ion imprinted polymer, and stabilized reusable performance, simpleoperation, easily controllable experimental conditions, suggesting a potential effective wayfor separation and selective enrichment of Uranium (VI) and Cs (Ⅰ) ion in the actualsamples.Strontium (Ⅱ) ion-imprinted polymer was prepared by bulk polymerization usingStrontium (Ⅱ) ion as template ion, resulted Strontium (Ⅱ)-4-vinyl pyridine (4-VP)-Acetylacetone complex as a function monomer, ethylene glycol dimethacrylate as cross-linkingmonomer, and2,2′-azobisisobutyronitrile as initiator. The adsorption performance ofStrontium (Ⅱ)-ion-imprinted polymer for Strontium (Ⅱ) is explored. The factors thataffect the adsorption ability, including adsorbent dosage, pH, adsorption time and solutionconcentration, selective recognition, are investigated. The characterization of this polymercontains scanning electron microscope, FT-IR and X-ray EDS. The experiment resultsreveal that compared with the none ion imprinted polymers, this Strontium (Ⅱ)-ion-imprinted polymer performs high selectivity, fast adsorption rate, good selectiverecognition ability, and good thermal stability and reusable performance. |
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