单宁酸与苯酚在复合功能树脂上的竞争吸附研究  

Competitive Adsorption of Tannic Acid and Phenol onto a Bi-functional Polymeric Adsorbent

作　　者：陆朝阳[1,2] 姜笔存[1] 李爱民[1,2] 王旭[1] 马依菲[1] 沈晓鹏[1] 

机构地区：[1]南京大学环境学院污染控制与资源化研究国家重点实验室,南京210093 [2]江苏南大戈德环保科技有限公司国家环境保护有机化工废水治理与资源化工程技术中心,南京210046

出　　处：《化学学报》2010年第5期437-442,共6页Acta Chimica Sinica

基　　金：国家杰出青年基金(No.50825802);国家自然科学基金(No.50578088);国家"863"高技术基金(No.2006AA06Z383)资助项目

摘　　要：研究了水源水和生化尾水中的代表性模拟背景污染物单宁酸和代表性有机毒物苯酚之间的竞争吸附行为,开展了单组分、同时竞争吸附和预负载竞争吸附实验.研究表明,单宁酸对苯酚在复合功能树脂上的吸附有显著削弱作用.竞争吸附机理包括孔堵塞和吸附质间作用:单宁酸对树脂上微孔的堵塞,减少了苯酚优势吸附位点的数量,降低了吸附剂表面的异质性;吸附质间作用削弱了树脂对苯酚的吸附作用力.Tannic acid, a representative background compound of source water and biologically treated sewage effluent, was chosen to study the competitive effect on the adsorption of phenol by a bi-functional polymeric adsorbent.Single solute adsorption, simultaneous adsorption and preloading experiments were performed.The result indicated that tannic acid had a dramatic effect on phenol adsorption onto resin through different mechanisms, including interactions between adsorbates and pore blockage.The interaction between adsorbates weakened resin adsorption force towards phenol;pore blockage decreased the primary micropore adsorption sites for phenol, resulting in a reduction in the heterogeneity of adsorbent surface.

关 键 词：单宁酸 苯酚 复合功能树脂 竞争吸附 孔堵塞机理 吸附质间作用 

分 类 号：O647.31[理学—物理化学]