表面活性剂及阳离子对水中悬浮颗粒ζ电位的影响  

The Influence of Surfactants and cationic Ions on the ζ Potential of Colloids in Water

作　　者：王慧云[1] 张波[1] 翟小兵[2] 贾少辉[1] 

机构地区：[1]济宁医学院药学系 [2]济宁市水利局

出　　处：《济宁医学院学报》2006年第2期1-3,共3页Journal of Jining Medical University

基　　金：国家重点基础研究专项经费资助项目(G1999022505)

摘　　要：目的研究表面活性剂,阳离子等对天然水体中悬浮颗粒ζ电位的影响,为天然水体或饮用水体系中胶体粒子去除提供依据和指导。方法测定了阴阳离子表面活性剂体系、不同电解质条件下水体中胶体粒子ζ电位,探讨了影响天然水体胶体粒子ζ电位的因素。结果电解质及阳离子表面活性剂体系中胶体颗粒ζ电位负值降低,甚至发生符号的反转,阴离子表面活性剂体系ζ电位负值增加。结论高价阳离子及阳离子表面活性剂可在胶粒的双电层内发生特性吸附,过量的高价阳离子及阳离子表面活性剂的存在将使胶体颗粒出现在稳现象。阴离子表面活性剂的存在增加了水中胶体颗粒的稳定性,使处理难度加大,耗药量增加。Objective To explore the influenel of surfactants and cationic ions on ζ potential of colloids in water. Methods The effect influence of surfactants and cationic ions on the ζ potential values of colloids in water of Gangfu river was investigated. Results The ζ otential of colloids become less negative with the increasing cationic ions concentration, Bcause the thickness of electrical double layer on the surface of colloid was compressed by cationic ions. And moreover the zeta potential of colloids become positive with the increasing concentration of AlCl3. Conclusion The results also indicated that the ζ potential of colloids become more negative with increasing SDS concentration, but less negative with the increasing CTAB concentration. Moreover when the surface of colloids is covered with surfactant, the effect of increasing surfactant concentration becomes less important.

关 键 词：Ζ电位 双电层 胶体颗粒 表面活性剂 

分 类 号：R187[医药卫生—流行病学] R373[医药卫生—公共卫生与预防医学]