Abstract:

Solid and liquid PAC products are tested by colloid titration. The rules of influences of PAC concentration, pH, basicity and other factors on the determination of electric charge density are studied. When the pH tested is about 5.5, and coagulant mass concentration 10-25 mg/L, the back titration method could be adopted to determine the charge density of PAC. The coagulation and decolorization experiments of the lake water and the dye aqueous solution illustrate that the higher charge density of the PAC products is, the higher the turbidity removing rate and the decolorization rate are.

Key words: coagulation, polyaluminium chloride(PAC), colloid titration, determination of charge density

摘要：

通过胶体滴定法对固体和液体PAC产品进行实验，研究了PAC浓度、pH、盐基度等因素对电荷密度测定的影响规律；当实验pH为5.5左右，混凝剂质量浓度为10~25 mg/L，采用返滴定法可测定PAC的电荷密度。通过对湖水和染料水溶液的混凝脱色实验，表明电荷密度高的PAC产品浊度去除率、脱色率高。

关键词: 混凝, 聚合氯化铝PAC, 胶体滴定法, 电荷密度测定

CLC Number: 

• X703