PAC remove the water-color quality of SS, COD, and arsenic, mercury, widely used in drinking water, industrial water. Polyaluminium Chloride, called PAC, is a multi- ... PH; low corrosion of pipelines equipment; can remove the water-color quality of SS, COD, and arsenic, mercury and other heavy metal ... widely used in drinking water, industrial water and wastewater treatment. Polyaluminium Chloride PAC