PAC-PDMDAAC处理微污染水的絮凝特征研究  

Study on flocculation characteristics of micro-polluted water treated by PAC-PDMDAAC

作　　者：李谢玲[1] Li Xieling(Department of Mining and Environmental Engineering,Chongqing Vocational Institute of Engineering,Jiangjin 402260,China)

机构地区：[1]重庆工程职业技术学院矿业与环境工程学院

出　　处：《工业水处理》2019年第9期58-62,共5页Industrial Water Treatment

基　　金：2017年重庆市博士后科研项目特别资助(Xm2017175)

摘　　要：采用无机-有机复合絮凝剂PAC-PDMDAAC处理微污染水,考察了PAC与PDMDAAC质量比、PACPDMDAAC投加量对浊度和溶解性有机物去除效果的影响,利用絮凝度测定仪(PDA)在线监测絮凝过程,分析了不同pH、不同搅拌条件下的FI指数、分形维数的絮凝特征变化规律。实验结果表明,PAC与PDMDAAC的最佳质量比为5∶1,PAC-PDMDAAC最佳投加量为30 mg/L,最佳pH为5.0。当快搅强度为100 r/min时,FI曲线的平衡值最大,絮凝效果最佳;当快搅时间为1 min时,分形维数随快搅强度的增大而增大;当快搅时间分别增加至2 min和3 min时,分形维数随快搅强度的增大而减小。In this study,inorganic-organic composite flocculants(PAC-PDMDAAC) was used to treat micro-polluted water. The effects of PAC-PDMDAAC mass ratio,dosage of PAC-PDMDAAC on the turbidity and dissolved organic matter removal were mainly investigated. The effects of pH and stirring conditions on the flocculation index(FI) and fractal dimension were analyzed through on-line monitoring by using photometric dispersion analyzer(PDA). The experimental results indicate that the optimum conditions are as follows: the ratio of PAC to PDMDAAC is 5∶1,the dosage of PAC-PDMDAAC is 30 mg/L,and the pH value is about 8.0,respectively. Furthermore,the best flocculation effect is obtained at the fast stirring intensity of 100 r/min,as the equilibrium value of FI curve is the highest. When the fast stirring time is 1 min, the fractal dimension gradually increases with the increase of the fast stirring intensity.In contrast,as the fast stirring time extends to 2 or 3 min, respectively,the fractal dimension decreases with the increase of fast stirring intensity.

关 键 词：PAC-PDMDAAC 微污染水 絮凝 FI指数 分形维数 

分 类 号：X703.1[环境科学与工程—环境工程]