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Frontiers of Environmental Science & Engineering >> 2019, Volume 13, Issue 4 doi: 10.1007/s11783-019-1139-y
Ozonation as an efficient pretreatment method to alleviate reverse osmosis membrane fouling caused by complexes of humic acid and calcium ion
Abstract
Humic acids (HA) didn’t cause obvious reverse osmosis (RO) membrane fouling in 45 h. Osmotic pressure (NaCl) affected slightly the RO membrane fouling behavior of HA. Ca2+ promoted aggregation of HA molecules and thus aggravated RO membrane fouling. Ozonation eliminated the effect of Ca2+ on the RO membrane fouling behavior of HA. The change of the structure of HA was related to its membrane fouling behavior.
Keywords
Reverse osmosis ; Membrane fouling ; Humic acid ; Ca2+ ; Ozone
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