十二烷基硫酸钠与铝盐絮凝特征研究  

Coagulation Characteristics of Sodium Dodecyl Sulfate With Aluminum Salt

作　　者：杨飞飞[1] 王栋[1] 闫杰[1] 段敏[1] 

机构地区：[1]大连理工大学环境学院,辽宁大连116024

出　　处：《辽宁化工》2011年第2期109-112,共4页Liaoning Chemical Industry

基　　金：国家自然科学基金项目--环境水相中表面活性剂的复合聚集体形成热力学及构造研究;项目号:20577005

摘　　要：为了更好地去除水体中残留的表面活性剂,选用十二烷基硫酸钠为研究对象,在298.15 K时,对临界胶束浓度之上和CMC之下的SDS溶液与典型无机絮凝剂(AlCl3)的絮凝行为进行了实验和理论方面的研究。结果表明:在SDS/AlCl3絮凝体系中,0.01 mol/L SDS和0.001 mol/L SDS与铝盐达到最佳絮凝时,Al3+与SDS的摩尔比(记为CAl/CSDS)分别约为0.5和1.0。最佳絮凝时,体系Zeta电位接近零点,表面张力降到最小,pH值均在4.0以下,电导率随CAl/CSDS呈线性增大变化。在0.01 mol/L SDS与Al3+絮凝体系中,当凝聚摩尔比CAl/CSDS约为21.6时,絮凝体完全消失并不再浑浊,而在0.001 mol/L SDS与Al3+絮凝体系中观察不到絮凝体完全消失的现象。To enhance removal efficiency.of residual surfactents in water system, the coagulation characteristics of anionic surfactant sodium dodecyl sulfate （SDS） solutions of concentrations above and below the critical micelle concentration （CMC） using different dosage of AlCl3 salt were investigated at 298.15 K. Results showed that, at the optimization flocculation areas, the molar ratio CAl/BSDS of 0.01 mol/L SDS with Al^3＋ and 0.001 mol/L SDS with Al^3＋ were 0.5 and 1.0 respectivly. At the optimum flocculate areas, zeta potential closed zero, and surface tension achieved the least points, pH values were basically same below 4.0, and conductivity of the two SDS/Al^3＋ systems increased linearly with the addition of Al^3＋ salts. The aggregates completely disappeared at [CAl/BSDS]= 21.6 was observed only in the system of 0.01 mol/L SDS with Al^3＋, but not in the system of 0.001 mol/L SDS with Al^3＋.

关 键 词：临界胶束浓度 十二烷基硫酸钠 铝盐 絮凝 

分 类 号：TQ423[化学工程]