Poly Aluminium Chloride (PAC) is a highly sought-after coagulant agent widely utilized in diverse industries due to its exceptional properties and effective applications. As a prominent member of the aluminum salts family, Poly Aluminium Chloride, or PAC, is extensively employed in water treatment, paper production, textiles, and many other sectors.

The flocculation of polyaluminum chloride is completed by the adsorption bridging between polyaluminum chloride molecules. 

The adsorption and bridging of polyaluminum chloride refers to the adsorption and bridging of high molecular substances produced by hydrolysis of polyaluminum chloride. Generally, polymer flocculants have linear molecular structure, and there are groups on the molecular chain that can combine with suspended particles. When polyaluminum chloride contacts with suspended particles in wastewater, the groups and suspended particles are adsorbed and combined, while other parts of polymer continue to combine with suspended particles, forming the role of bridge. In the process of this action, because a large number of suspended particles are adsorbed and will not disperse, large alum deposits appear, achieving good flocculation effect. If less suspended particles can not form precipitation after adsorption bridge, then the groups on the molecular chain will combine with other polyaluminium chloride molecular groups to form a large precipitate.

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