Key Quality Indicators of Polyaluminium Chloride (PAC)

1. Basicity
Basicity refers to the degree of hydroxylation or the content of hydroxyl groups within the PAC structure. It is a crucial parameter indicating the polymer's level of polymerization. This indicator is closely related to the coagulation-flocculation efficiency and is one of the most important characteristics of PAC. Generally, a higher basicity often provides better flocculation performance when treating raw water with high pollutant concentrations or salinity.

2. pH Value
The pH value of a PAC solution is another significant indicator. Typically, the pH increases with a rise in basicity. It is important to note that PAC solutions with the same basicity can exhibit different pH values if their concentrations differ.

3. Alumina Content (Al₂O₃ Content)
The Alumina (Al₂O₃) content represents the concentration of the active component in PAC. There is a general correlation between this content and the solution's relative density: a higher relative density usually indicates a higher Al₂O₃ content. This indicator directly influences the effective dosage required and the overall treatment efficacy.