... new type of environmental product.2:used in drinking water purifying and industrial wasterwater GONGYI YIQUAN POLY FERRIC SULFATEpoly ... industrial sewage, such as metallurgy, pottery, coal dressing, papermaking, printing and dye, the leather, and petrochemical industry, etc, extensively, ... urban life is dealt with and deal with in Ex-stage of drinking water.Advantages:1.fine coagulation performance2 ...