... solution)3.5-5.0SO2-4, % ≤N,% ≤0.01As,% ≤0.0002Cr6+,% ≤0.0005Hg,% ≤0.00001Pb,% ≤0.001Cd, % ≤0.0002ApplicationFeed water in the cityWater reuseRecirculation cooling waterOilfield ... in water solution,good light transmittanceWide PH values between 5.0 and 9.0;;Good applicability to the change of turbidity, alkalinity and ...