... water-color quality of SS, COD, and arsenic, mercury, widely used in drinking water, industrial water. Polyaluminium Chloride, called PAC, ... this product is the water effect is obvious, flocculation and sedimentation speed, Shen decreased activity is good, no ... COD, and arsenic, mercury and other heavy metal ions; The product is widely used in drinking water, industrial water and wastewater treatment. ...