Polyaluminum chloride is a commonly used water treatment agent, and its pH value directly affects its treatment effect. Elaborate on the pH value of polyaluminum chloride from three aspects.

The pH value and coagulation effect of polyaluminum chloride

As a coagulant, the pH value of polyaluminum chloride has a significant impact on the coagulation effect. Generally speaking, the optimal pH range for adding polyaluminum chloride is 6.5-8.5. When the pH value is too low, polyaluminum chloride will be difficult to react well with alkaline substances in water, resulting in poor coagulation effect; When the pH value is too high, the decomposition rate of polyaluminum chloride accelerates, which will reduce the coagulation effect. Therefore, controlling the dosage and pH value of polyaluminum chloride is the key to ensuring the coagulation effect.

In addition to pH value, there are other factors that can also affect the coagulation effect of polyaluminum chloride. For example, the concentration and temperature of suspended solids in water can have an impact on the coagulation effect. Therefore, in practical applications, it is necessary to comprehensively consider multiple factors and choose the appropriate dosage and pH value of polyaluminum chloride to achieve the best coagulation effect.