丙烯酸酯基吸附树脂对水体中单宁酸和没食子酸的吸附研究  

STUDY ON ADSORPTION OF TANNIC AND GALLIC ACIDS USING ACRYLIC ESTER RESINS

作　　者：周扬[1,2] 王津南[1,2] 许丽[1,2] 李爱民[1,2] 

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 [2]江苏省有机毒物污染控制与资源化工程技术研究中心,南京210038

出　　处：《离子交换与吸附》2010年第3期202-209,共8页Ion Exchange and Adsorption

基　　金：国家自然科学基金重点项目(50938004)

摘　　要：选用3种商品丙烯酸酯基吸附树脂作为吸附剂,研究单宁酸和没食子酸在树脂上的吸附行为和机理。吸附等温线表明,丙烯酸酯基吸附树脂对单宁酸的吸附量远高于没食子酸的吸附量,这归因于两种有机酸亲水性的差异;HP-2MG比其他两种树脂对单宁酸有更高的吸附容量,而XAD-7树脂对没食子酸的吸附量高于其它两种丙烯酸酯基吸附树脂,这归因于树脂比表面积和孔径的差异;吸附热力学研究表明,丙烯酸酯基吸附树脂对天然有机酸的吸附是自发的放热过程,疏水作用是主要吸附作用。Tannic and Gallic acids are common natural dissolved organic acids in environment,which are the major components,dissolved organic matters in drinking water source. These acids can form disinfection by products during the disinfection process,and destroy water quality. This paper studies the adsorption of Tannic and Gallic acids by three commercial acrylic ester resins. The adsorption isotherms can be fit by Freundlich and Langmuir models. The adsorption capacity of acrylic ester resin for Tannic acid is much higher than that for Gallic acid,which is due to the different hydrophobic between Tannic acid and Gallic acid. HP-2MG can remove Tannic acid more effectively than XAD-7 and XAD-761 do,but the removal of Gallic acid by XAD-7 is higher than that by HP-2MG and XAD-761. Furthermore,values of the enthalpy and entropy changes show the adsorption of TA and GA on acrylic ester resins to be s a spontaneous exothermic process,and the adsorption force is hydrogen bonding.

关 键 词：丙烯酸酯基吸附树脂 单宁酸 没食子酸 吸附 

分 类 号：O647.3[理学—物理化学]