| Title |
Transport Characterizations of Natural Organic Matter ( NOM ) in Ion - Exchange Membrane |
| Authors |
김도희(Do Hee Kim),이상엽(Sang Youp Lee),이홍주(Hong Joo Lee),문승현(Seung Hyeon Moon),조재원(Jae Weon Cho) |
| Abstract |
Various membrane tests were conducted to determine transport characteristics of natural organic matter (NOM) in ion exchange (IX) membranes. Both pH and ion strength could affect the adsorption of NOM on the membrane surface. The amount of the adsorbed NOM mass on the membrane surface under an alkaline (pH 10) condition was approximate 3.0 times larger than that under an acid condition (pH 4) when the dissolved organic carbon (DOC) concentration of NOM was 10 ㎎-C/L. Zeta potential was characterized to demonstrate the effect of IX membrane fouling with NOM on the membrane surface charge. The major transmitted NOM fraction through electrodialysis membrane was anticipated to be the hydrophobic NOM due to its high negative charge density. However, the molecular size of the hydrophobic NOM was too large to pass thorough the IX membrane pores, providing its accumulation or adsorption on the membrane surface. |