A222型阴离子交换树脂脱除HPPH^+体系中的SO_4^(2-)、NO_3^-

A222 anion exchange resin for eliminating the SO_4^(2-) and NO_3^- in aqueous solution of HPPH^+

优化选取凝胶型强碱性苯乙烯系A222型阴离子交换树脂,对HPPH^+溶液中SO_4^(2-)、NO_3^-的交换性能进行了研究。通过静态法分别考察了A222型阴离子交换树脂在水溶液及0.05mol/L HPPH+溶液中对SO_4^(2-)和NO_3^-脱除过程。结果表明,A222型阴离子交换树脂对HPPH+无化学吸附作用,在水体系中对SO_4^(2-)和NO_3^-的平衡交换量分别为0.8382mmol/g和1.2980mmol/g,符合Langmuir和Freundlich吸附经验方程。树脂用量和温度是离子交换过程的主要影响因素,温度升高有利于离子交换的进行,树脂的优化用量为4g/L。A222型阴离子交换树脂可高效联合脱除HPPH+体系中的SO_4^(2-)和NO_3^-。FTIR谱图表征显示,SO_4^(2-)和NO_3^-可与树脂交换基团进行交换。

Gel-type strong basic anion exchange resin was screened and A222 anion exchange resin was selected for removal of SO_4^(2-),NO_3^-in the aqueous solution of HPPH+.The maximum exchange capacity of A222 anion for SO_4^(2-),NO_3^-exchange resin was determined through static absorption experiments in water and aqueous solution of HPPH+.The results indicated that A222 anion exchange resin showed almost no chemical adsorption of HPPH+,the maximum exchange capacities for SO_4^(2-) or NO_3^-were 0.8382mmol/g and 1.2980mmol/g,respectively.The exchange process could be described using Langmuir or Freundlich equations.Resin dosage and temperature were the main influencing factors of ion exchange process,the increase of temperature was favorable for the ion exchange and the optimum dosage of resin was 4g/L.A222 anion exchange resin could be applied for removal of SO_4^(2-)and NO_3^-in aqueous solution of HPPH+.FTIR characterizations indicated that there was new chemical bond formation during exchange with SO_4^(2-)and NO_3^-.