... sludge dewatering. Based on the product of Polymer Ferric Sulphate, we develop a new inorganic polymer to decolor ... industry, it has no the defects of Polymer Ferric Sulphate. It solution is weak acid. Properties:1, New type, ... 150.01Basicity %9.0-14.014.0PH value(1% solution)2.0-3.02.4Arsenic(As)% , ≤0.00080 ... , ≤0.150.01Basicity, %9.0-14.014.0PH (1% aq. solution)2.0-3.02.4As, % , ≤0.00080.0001Pb , % , ...