The pH value and flocculation effect of polyaluminum chloride

Polyaluminum chloride is usually used together with flocculants in water treatment to improve flocculation efficiency. The pH value of polyaluminum chloride also has a certain impact on the performance of flocculants. Generally speaking, when the pH value of polyaluminum chloride is low (acidic), it can form stable coagulation particles with cationic flocculants, improving the flocculation effect; When the pH value is high (alkaline), it is beneficial for anionic flocculants, which helps with their adsorption and flocculation.

In addition, the pH value of polyaluminum chloride is also related to the oxalic acid adsorption performance of the flocculant. If the pH value of polyaluminum chloride is too high, it will lead to an increase in hydroxide ions in polyaluminum chloride, thereby reducing the adsorption capacity of the flocculant for oxalic acid and reducing the flocculation effect. Therefore, in order to achieve good flocculation effect, it is necessary to adjust the pH value of polyaluminum chloride according to the specific situation.

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