摘要
以阴离子表面活性剂——十二烷基硫酸钠(SDS)作为一种低分子溶解性有机物的代表物质,投加新型水处理剂纳米SiO2对6NTU高岭土悬浊液进行混凝沉降试验.运用形态学理论,借助电镜观察与图像分析技术,研究纳米SiO2的作用机理、吸附絮凝效果与形态学特性.结果表明,纳米SiO2对SDS的去除率随溶液pH值的升高而降低.纳米SiO2具有良好的助凝效果,但其单独使用时对浊度的去除效果较差.纳米SiO2能迅速吸附溶液中的SDS,并在短时间内达到平衡,其对SDS的吸附特性符合Freunlich等温吸附式.
Anionic surfactant-Sodium Dodecyl Sulfate （SDS） was chosen as a representative of the dissolved low weight organic matters. With morphology theory, and electron microscopic observation and image analysis technology,it investigated nanosilica effect mechanism, adsorption flocculation efficiencies, and morphologie properties by conducting the coagulation and sedimentation experiment, and by adding of a new chemical-silica nanoparticles to 6 NTU Kaolin suspensions,The experimentation results show the treatment effect of nanosilica on SDS improves as pH value rises. Nanosiliea is an effective coagulation aid, but it＇ s removing turbidity is poor. Furthermore, due to its great specific surface area,nanosilica can adsorb dissolved SDS rapidly, and reach equilibrium in a short time, the adsorption behaviors of which obey Freunlish adsorption isotherm formula.
出处
《广东工业大学学报》
CAS
2009年第2期31-35,共5页
Journal of Guangdong University of Technology
基金
国家自然科学基金项目(50170897)
广东省自然科学基金项目(06300267)
