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以2-乙基己基磷酸单-2-乙基己酯(P507)为萃取剂,苯乙烯-二乙烯基苯大孔非极性吸附树脂(HZ818)为载体,聚丙烯酸(PAA)为包覆材料,N,N-亚甲基双丙烯酰胺为交联剂,制备了包覆型P507浸渍树脂。红外光谱(FTIR)表征表明包覆后树脂上的萃取剂未受影响,热重分析(TGA)表明制备的包覆型浸渍树脂具有较好的热稳定性。分别以静态和动态实验法考察包覆型浸渍树脂在盐酸介质中吸附铟(Ⅲ)的性能。静态实验表明,该树脂在盐酸体系中对铟(Ⅲ)的最佳吸附pH为0.8,吸附平衡时间为10 h,饱和吸附量在288,298,308 K时分别为29.4,32.7,35.3 mg·g~(-1)。等温吸附实验表明,Langmuir等温吸附模型能较好地反映包覆型浸渍树脂的吸附过程,此吸附过程为吸热反应。动态实验表明,与未包覆的P507浸渍树脂相比,包覆树脂的稳定性更高。
2-ethylhexyl phosphate mono-2-ethylhexyl ester (P507) as extractant, styrene-divinyl benzene macroporous non-polar adsorption resin (HZ818) as carrier, polyacrylic acid (PAA) Materials, N, N-methylene-bis-acrylamide as cross-linking agent, coated P507 impregnated resin was prepared. FTIR characterization showed that the extractant on the resin was unaffected, and TGA indicated that the prepared impregnated resin had good thermal stability. The properties of indium (Ⅲ) adsorbed on the coated resin in hydrochloric acid were investigated by static and dynamic methods respectively. The results of static experiments show that the optimum adsorption pH of indium (Ⅲ) in the system is 0.8, the adsorption equilibrium time is 10 h, the adsorption capacity is 29.4, 32.7, 35.3 mg · g ~ (- 1). Isothermal adsorption experiments show that Langmuir isothermal adsorption model can better reflect the impregnation resin coated impregnation process, the adsorption process for the endothermic reaction. Dynamic experiments show that coated resin is more stable than uncoated P507 impregnated resin.