摘要
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。
A coated impregnated resin was prepared with 2-ethylhexyl phosphoric acid mono（ 2-ethylhexyl） ester（ P507） as the extractant,styrene divinylbenzene macroreticular nonpolarity adsorption resin（ HZ818） as the carrier,polyacrylic acid（ PAA） as the coating film and N,N＇-methylenebis（ 2-propenamide） as crosslinked agent. Fourier transform infrared spectroscopy（ FTIR） result showed that there was no influence on the nature of extractant in the coating procedure. Thermogravimetry analysis（ TGA） indicated that the prepared coated impregnated resin had good thermal stability. The adsorption properties for indium（ Ⅲ） with this resin from hydrochloric acid medium were investigated by batch method and column method. Batch experiments showed that the optimum adsorption p H was 0. 8,the adsorption equilibrium time was 10 h,and the saturated adsorption capacities were 29. 4,32. 7,35. 3 mg·g-1at288,298,308 K,respectively. Langmuir adsorption isotherm was suitable for simulating the adsorption process with this coated resin,and this process was shown as an endothermic reaction. Compared with the uncoated impregnated resin prepared by conventional method,the stability of the coated impregnated resin was better in the column experiments.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2016年第8期825-830,共6页
Chinese Journal of Rare Metals
基金
国家自然科学基金项目(21171085)
山东省自然科学基金项目(ZR2010BM027)资助
关键词
浸渍树脂
吸附
包覆
铟
solvent impregnated resins
indium（Ⅲ）
adsorption
coated
indium
