Like all coagulants PAC works by extracting after which clumping alongside one another dissolved, colloidal and suspended make a difference. The ensuing floc is then trapped on the filter. There are now a number of different grades of PAC with aluminium concentrations between 9.5% and 18%. The concentration of aluminium https://www.tjcyindustrialchem.com/news/what-is-poly-aluminium-chloride.html