CPB修饰聚苯乙烯树脂的除油机理研究

采用十六烷基溴化吡啶(CPB)对聚苯乙烯阳离子交换树脂进行化学修饰得到改性树脂R-CPB,并将其作为填柱材料处理含油废水;通过测量树脂表面润湿性的变化和废水中油滴的Zeta电位值论证了CPB修饰树脂的除油机理。结果表明,CPB阳离子的化学修饰改变了树脂的表面润湿性能,使其亲水性下降而亲油性提高;R-CPB树脂主要通过影响油滴在废水中的Zeta电位来达到破乳的目的;在相同操作条件下,R-CPB树脂的除油去浊能力明显高于未改性树脂的,且在除油的稳定性上好于活性炭,具有较好的应用前景。

Mechanism of Oily Wastewater Treatment Using Polystyrene Resin Modified by Cetylpyridinium Bromide

Cetylpyridinium bromide-modified polystyrene resin (R-CPB) was synthesized as pack-ing material for treating oily wastewater.The oil removal mechanism was studied by resin surface wettabil-ity measurement and oil droplet Zeta potential test.The results indicate that the resin surface wettability is significantly altered and the hydrophilicity is decreased while the lipophilicity is increased.R-CPB influ-ences the Zeta potential of oil droplets and therefore enhances the demulsification process.Under the same condition, R-CPB demonstrates a better oil and turbidity removal capacity than the un-modified pol-ystyrene resins and a better oil removal stability than activated carbon, which shows a good future for ap-plication.