聚合β-环糊精包结树脂对钯的吸附性能研究

Studies on Adsorption of β-cyclodextrin Polymer Resins to Palladium

关键词:  β-环糊精交联聚合物  双硫腙  氯磺酚偶氮若丹宁  包结树脂  钯  吸附

Key words:  β-cyclodextrin polymer  dithizone  sulfochlorophenolazorhodanine  inclusion resin  palladium  adsorption

摘要:

以环氧氯丙烷为交联剂,在碱性介质中与β-环糊精合成,制备出水不溶性的固体环糊精聚合物(β-CDP),分别包结双硫腙和氯磺酚偶氮若丹宁制成包结树脂,并以此为吸附剂,结合分光光度法考察它对水体中微量Pd(Ⅱ)离子的吸附性能。研究结果表明,两种包结树脂的最价吸附时间为30min,选择8mol/L盐酸溶液为洗脱剂时的Pd(Ⅱ)洗脱率分别达到85.57%和80.66%,包结树脂对Pd(Ⅱ)具有很强吸附性。

Abstract:

The insoluble solid crossliked polymer,β-cyclodextrin polymer, was synthesized by epichlorohydrin as crosslinker with β-cyclodextrin in alkaline media. By inclusion of dithizone and sulfochlorophenolazorhodanine, two inclusion resins were formed. The adsorptivity of these inclusion resins was determined by spectrophotometric study of trace Pd(Ⅱ) ions in water. The results show that the best adsorption time of two inclusion resins are 30 min. When 8mol/L hydrochloric acid solution as the eluting agent, the elution rate of Pd(Ⅱ) on two resins was 85.57% and 80.66% respectively, which indicated the strong adsorptivity of resins to Pd(Ⅱ).