3种树脂对水溶液中单宁吸附性能的比较研究  

STUDY ON ADSORPTION BEHAVIORS OF TANNIN FROM AQUEOUS SOLUTION ON THREE POLYMERIC RESINS

作　　者：孙越[1] 童建[2] 李爱民[3] 张全兴[3] 

机构地区：[1]东南大学土木工程学院,南京210096 [2]江苏省水文水资源勘测局,南京210029 [3]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》2007年第6期512-518,共7页Ion Exchange and Adsorption

基　　金：污染控制与资源化研究国家重点实验室开放课题(PCRRF07012)

摘　　要：通过静态吸附实验,研究了大孔吸附树脂NG-8、胺基化大孔吸附树脂NG-9和胺基化超高交联大孔吸附树脂NDA-99对水溶液中单宁的吸附行为特性。结果表明,3种树脂对单宁的吸附均符合Langmuir等温吸附方程,树脂对单宁的吸附容量NG-9>NG-8>NDA-99;吸附过程符合准二级动力学方程,吸附速率常数NG-8>NG-9>NDA-99。树脂的孔结构与表面化学性质是影响树脂吸附性能的重要因素。Adsorption behavior of tannin from aqueous solution by the macroporous polymeric resin NG-8, aminated hypercrosslinked polymeric resin NDA-99 and aminated macroporous polymeric resin NG-9 was studied through static experiments. The empirical Langmuir equation was successfully employed to describe the adsorption process and the adsorption capacities towards tannin increase in the following order： NG-9 〉 NG-8 〉 AH-1. The adsorption rate implied a pseudo-second order kinetic mechanism and the value of rate constant of the tested resins in the following order： NG-8 〉 NG-9 〉 NDA-99. The results showed that the pore size distribution and the tertiary amino group on the polymer played a significant role in tannin adsorption performance.

关 键 词：吸附树脂 吸附 单宁 热力学 动力学 

分 类 号：O647.3[理学—物理化学]