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Ultrafiltration of Humic and Natural Water: Comparison of Contaminants Removal, Membrane Fouling, and Cleaning  

Choo, Kwang-Ho (Department of Environmental Engineering, Kyungpook National University)
Nam, Mi-Yeon (Department of Environmental Engineering, Kyungpook National University)
Publication Information
Membrane Journal / v.18, no.1, 2008 , pp. 65-74 More about this Journal
Abstract
NOM and fine particles are the main target materials in water treatment using membranes. Particularly, humic substances extracted from soils are frequently used in many fundamental studies representing natural organic matter in raw water for drinking water treatment. In this study, ultrafiltration (UF) of artificial humic water and natural river water was conducted and the characteristics of removal efficiency and permeability were compared. In the UF of river water, the transmembrane pressure increased in the same pattern with that of 5 mg/L humic water. For the removal of organic matter and fine particles, however, two types of feed water had shown different trends. Kaolin particles and humic acids added to artificial water were better removed, while colloids and organics in natural water were relatively poorly removed. From the $UV_{254}$ and GPC analyses, it seemed that the hydrophobicity and size of humic substances contributed to the greater removal of organic matter. The UF membrane applied for humic water also showed a higher flux recovery by caustic chemical cleaning than that for river water.
Keywords
ultrafiltration; drinking water; humic acid; kaolin; hydrophobicity; particle size distribution;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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