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Effect of particle charge, size and fractal dimension under different pre-coagulation pHs and alum dosages on microfiltration (MF) membrane permeability and removal of humic acids (HAs) were studied. Both aggregates structure and size played important roles in membrane filtration. Under sweep coagulation condition, the insufficient low coagulant dosage of 10mg/L alum resulted in low removal of HAs...
The characteristic of aggregates pre-coagulated by inorganic monomer alum, polymer aluminium chlorohydrate(ACH) and polyaluminium chloride(PACl) coagulants impose major impact on the removal of humic acids (HAs) and the reduction of microfiltration (MF) membrane fouling. The fractal dimension of flocs formed by ACH and PACl is higher than that by monomer alum, indicating Keggin structure produced...
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