D301树脂、330树脂对双酚A吸附性能的对比

Contrast of Adsorption Performances of D301 Resin and 330 Resin on Bisphenol A

用静态吸附法对比研究D30l树脂、330树脂对环境激素双酚A的吸附性能。实验结果表明:相同条件下,D301树脂对双酚A的吸附量大干330树脂对双酚A的吸附量;330树脂在pH=4—9时对双酚A的吸附量最大,在pH值为11.31时,D301树脂对双酚A的吸附量最大,其吸附量大于330树脂对双酚A的最大吸附量;随着盐含量的升高,330树脂对双酚A的吸附量先迅速降低后平缓升高,而D301树脂对双酚A的吸附量随盐含量的升高逐渐增大;在80%C_2H_5OH和2mol/L NaOH的混合解吸剂中,D301、330树脂上双酚A的解吸率分别为99.99%、97.78%。D301树脂对双酚A的吸附存在离子交换,但以π—π作用为主,330树脂对双酚A的吸附以离子交换为主。

The adsorption performances of D301 resin and 330 resin on environmental hormone bisphenol A were investigated by static adsorption method.The results showed that the adsorption amount of D301 resin on bisphenol A was more than that of 330 resin under the same conditions.The maximum adsorption capacity of 330 resin on bisphenol A was obtained at the pH range of 4-9,while the maximum adsorption capacity of D301 resin was observed at pH of 11.31,which was larger than that of 330 resin.Adsorption capacity for D301 resin on bisphenol A increased with the increasing of salt concentration,while adsorption capacity for 303 resin first reduced quickly then rose up with the increasing of salt concentration slowly.In the mixture of strippant of 80%ethanol-2mol/L NaOH,the desorption rate of D301 resin and 330 resin on bisphenol A were respectively 99.99%and 97.78%. Ion exchange was one of driving forces for bisphenol A adsorbed onto D301 resin,butπ-πinteraction was the main driving force,while ion exchange was the main one for the adsorption of 330 resin on bisphenol A.