新型多胺螯合树脂对对硝基酚的吸附性能研究  

ADSORPTION PROPERTIES OF PARANITROPHENOL BY POLYAMINE CHELATING RESINS FROM AQUEOUS MEDIA

作　　者：陈泰鹏[1] 刘福强[1] 凌晨[1] 李兰娟[1] 

机构地区：[1]污染控制与资源化研究国家重点实验室南京大学环境学院,南京210093

出　　处：《离子交换与吸附》2012年第6期498-505,共8页Ion Exchange and Adsorption

基　　金：国家自然科学基金(51078178)

摘　　要：选取对硝基酚(PNP)为代表性污染物,研究自合成的多胺类螯合树脂(CEAD树脂)对PNP的吸附特性和影响规律(pH、初始浓度、温度、平衡时间、动态柱吸附),通过结构表征(FT-IR、XPS)探讨PNP在CEAD树脂上的吸附机理。结果表明,CEAD树脂对PNP吸附的最佳pH在4.0左右,吸附量随温度升高而降低,Freundlich模型拟合效果较好。表征分析认为PNP通过酚羟基与中性和质子化的胺基分别发生氢键作用和静电作用。Paranitrophenol （PNP） as model phenol-contaminant was adsorbed by polyamine chelating resins （CEAD）. The effects of pH value, initial concentration of PNP, temperature, time on adsorption performance were investigated. The adsorption mechanism was elucidated by FT-IR and XPS. Experimental results showed that the optimum pH-value for the removal of PNP was around 4.0. The adsorption capacity of PNP on CEAD decreased with tile increase of temperature, and the isotherm date could be described well by Freundlich model. The results of FF-IR and XPS indicated that the phenolic hydroxyl group of PNP probably reacted with neutral and protonated amino group on the resins through hydrogen bonding interaction and electrostatic interaction.

关 键 词：多胺类螯合树脂 对硝基酚 吸附 

分 类 号：O647.3[理学—物理化学]