高浓度PASC复合混凝剂的混凝动力学研究  

DYNAMIC INVESTIGATION ON COAGULATION WITH POLYALUMINUM SILICATE CHLORIDE (PASC) FLOCCULANT

作　　者：刘莉莉[1] 周维芝[1] 高宝玉[1] 许鹏举[1] 李倩[1] 

机构地区：[1]山东大学环境科学与工程学院,济南250100

出　　处：《环境化学》2006年第2期171-175,共5页Environmental Chemistry

基　　金：山东省优秀中青年科学家奖励基金(2004BS08002);山东省自然科学基金(y2005805)

摘　　要：以铝酸钠为碱化剂,合成了具有不同Si/Al摩尔比的聚硅氯化铝复合混凝剂(PASC),采用透光率脉动检测技术并结合混凝效能和Zeta电位的测定结果,对PASC以及聚合氯化铝(PAC)、参比PACref在混凝过程中絮集物形成和增长的变化差异作了对比研究．结果表明,混凝过程中,Zeta电位、剩余浊度以及混凝指数密切相关．采用铝酸钠为碱化剂合成并引入硅酸钠的混凝剂,有利于提高凝聚速度和絮集物颗粒大小．在Si/Al摩尔比为0．10时处理效果达到最佳．Using NaAlO2 as basification agent, the polyaluminum silicate chloride （PASC） with different Si/Al molar ratio were prepared by feeding alkali slowly. The change difference of forming and increasing of coagulant in the coagulation process of PAC and PASC were studied comparatively, using the determined results of transparency pulse examine technique combined with the coagulation efficiency and the Zeta electric potential. It was found that there were close relations between Zeta potential, residual turbidity, and flocculation index in coagulation process. It was also found that when the Na2SiO3, its coagulation speed and the particle flocculants used NaAlO2 as basification agent and were added size of coagulant formed were of greatest value; the flocculant had the optimal disposal effect as Si/Al ratio is 1.0

关 键 词：混凝动力学 聚硅氯化铝(PASC) 混凝指数 

分 类 号：X132[环境科学与工程—环境科学]