Enhanced fouling resistance of surface-modified alumina membranes by controlling humic acid and negatively charged-organosilane concentrations

摘要

Surface modification of membranes is effective means to not only alleviate membrane fouling, but also realize sustainable membrane performance. Our research work focuses on studying the effect of organosilane grafting on the antifouling properties for water purification. It could therefore reveal the efficiency of negatively charged membranes to retard humic acid deposition and deal with harsher wastewater conditions. Membrane fouling became more severe with increasing concentrations of humic acid. However, the organosilane-grafted membranes with negative charges could successfully reduce flux decline and membrane fouling. Fouling resistance was improved in the presence of higher organosilane concentrations.