Like all coagulants PAC works by extracting then clumping together dissolved, colloidal and suspended subject. The resulting floc is then trapped to the filter. There are now a quantity of different grades of PAC with aluminium concentrations in between 9.5% and 18%. The concentration of aluminium is not the only https://www.tjcyindustrialchem.com/news/what-is-poly-aluminium-chloride.html