阳离子絮凝剂HTCC与PAC复配絮凝效果研究  

Study on the flocculation effectiveness of cationic flocculant HTCC combined with PAC

作　　者：韦俊[1] 常青[1] 张文杰[1] 张彦成[1] 郝学奎[2] 

机构地区：[1]兰州交通大学环境与市政工程学院,甘肃兰州730070 [2]兰州工业高等专科学校建筑工程系,甘肃兰州730050

出　　处：《工业水处理》2011年第9期29-33,共5页Industrial Water Treatment

基　　金：长江学者和创新团队发展计划资助项目(IRT0966);甘肃省自然科学基金项目(0803RTZA003)

摘　　要：通过正交试验制备了阳离子絮凝剂壳聚糖季铵盐(HTCC),研究了HTCC与PAC复配的除浊效果,确定最佳复配比为m(HTCC)∶m(PAC)=1∶1.6,在该复配比及最佳投加量下,浊度去除率达96%以上,余浊<4 NTU。实验表明:pH对HTCC/PAC的除浊效果影响较大;沉降时间对除浊效果无明显影响;经HTCC/PAC处理后水样中的Al3+残余量明显低于国家生活饮用水卫生标准中的允许含量;HTCC/PAC对黄河兰州段水样的絮凝效果良好,最佳投加量下出水余浊<3 NTU。Cationic 2-hydroxypropyltrimethylammonium chloride chitosan （HTCC） has been prepared by orthogonal experiment. The removal rate of turbidity by composite flocculant HTCC/PAC is investigated, and its best composited ratio is determined to be m （HTCC）：m （PAC）=1：1.6. The turbidity removal rate reaches above 96% and residual turbidity reaches under 4 NTU by HTCC/PAC with this composite ratio and optimum dosages. The experiment shows that pH has great influence on the turbidity removal effectiveness of HTCC/PAC ,but the influence of settling time on turbidity removal is not obvious. The residual aluminum of the water samples treated by HTCC/PAC is obviously lower than the aluminum permissible content of Standards for Drinking Water Quality. The flocculation effectiveness of HTCC/PAC on the water samples from Lanzhou section of Yellow River is quite good, and its residual turbidity is less than 3 NTU when the dosage of HTCC/PAC is optimum.

关 键 词：壳聚糖季铵盐 聚合氯化铝 复配 絮凝 余铝 

分 类 号：X703[环境科学与工程—环境工程]