胶原纤维固化铁(Ⅲ)吸附材料的制备及其吸附细菌  

Ferric(Ⅲ)immoblized collagen fiber and its adsorption for bacteria

作　　者：陆爱霞[1] 焦丽敏[1] 廖学品[1] 姚开[2] 周荣清[1] 石碧[1] 

机构地区：[1]四川大学皮革化学与工程教育部重点实验室 [2]四川大学轻纺与食品学院,四川成都610065

出　　处：《化工学报》2006年第4期886-891,共6页CIESC Journal

基　　金："973"重大基础前期研究专项(2004CCA06100);国家自然科学基金项目(20476062);国家杰出青年基金项目(20325619).~~

摘　　要：将三价铁固化在胶原纤维上制备吸附材料,并对其吸附细菌的特性进行了研究.结果表明,铁(Ⅲ)是以化学键与胶原纤维结合,不会被水浸出;该吸附材料对细菌具有很强的吸附能力,当大肠杆菌和金黄色葡萄球菌菌体浓度分别为1.02×107cfu·ml-1和9.80×106cfu·ml-1时,30℃条件下吸附1h后胶原纤维对它们的吸附容量分别达到2.04×109cfu·g-1和3.15×109cfu·g-1,其吸附平衡符合Freundlich方程.菌龄对吸附平衡的影响较大,而温度及pH的影响不大.进一步研究表明,胶原纤维固化铁对细菌的吸附动力学可以用拟二级速率方程来描述,由该方程计算得到的平衡吸附量与实测值非常吻合,误差在2%以内;此外,其吸附速度非常快,吸附有可能是在材料的表面进行.A novel adsorbent, ferric （Ⅲ） immobilized collagen fiber, was prepared, and its adsorption behavior to bacteria was studied. Ferric was uniformly dispersed in collagen fiber mainly through chemical connection and could withstand the extraction of water. It was found that the ferric （Ⅲ） immobilized collagen fiber exhibited high adsorption capacity to bacteria. The adsorption capacity to E. coli and S. aureus were 2.04× 10^9cfu·g^-1 and 3.15 × 10^9cfu·g^-1 at 30℃ when the adsorption experiments were carried out for 1 h and their initial concentration were 1.02 ×10^7cfu·g^-1 and 9.8 ×10^6cfu·ml^-1 respectively. The adsorption isotherms could be described by the Freundlich equation. The adsorption capacity was influenced by culture age of the bacteria, but no considerable change was observed at varying temperature and pH. Further analysis indicated that the adsorption kinetics data could be well fitted by the pseudo-second-order rate model, and adsorption capacities calculated by the model were consistent with the actual measurements with error≤2%. In addition, the quite fast adsorption rate of bacteria on ferric （Ⅲ） immobilized collagen fiber was probably due to the fact that the adsorption process took place at the surface of adsorbent.

关 键 词：胶原纤维 铁(Ⅲ) 固化 吸附 大肠杆菌 金黄色葡萄球菌 

分 类 号：X17[环境科学与工程—环境科学]