정영미 박찬혁 이상협 권지향 2024-01-21T00:34:34Z 2024-01-21T00:34:34Z 2021-09-06 2007-08 1225-7672 https://pubs.kist.re.kr/handle/201004/134224 A coagulation process for RO (reverse osmosis) membrane pretreatment system was an effective technology to remove colloidal and particulate matters. However, coagulant residuals from the pretreatment process may negatively affect RO membrane performance. The bench-scale coagulant exposure study was performed to investigate the effect of their residual on adsorbed mass which related to the membrane performance. Coagulant addition in this study ranged from 0 to 5mg/L ferric chloride, alum, and 2mg/L cationic polymer(poly-di-methyldiallyl ammonium chloride) as coagulant aids. This results showed that adsorbed mass is not significantly increased during short-time period, however, accumulated mass of coagulants on the membrane surface is significantly increased during long-time experimental period. The effect of pH on coagulants adsorption characteristics was significantly differed due to the electrostatic repulsive interactions between soluble coagulants and membrane surface charge. This data suggest that the RO membrane performance of drinking water treatment plant could be decreased by adsorption of residual coagulants when applied for the coagulant pretreatment process. 대한상하수도학회 응집제 종류에 따른 RO막 표면 흡착 특성 Characteristics of Adsorption on the RO Membrane Surface by Coagulants Types Article 2 상하수도학회지, v.21, no.4, pp.477 - 483 상하수도학회지 21 4 477 483 kci ART001197529 Coagulation Process Coagulants Aluminum Sulfate Ferric Chloride Adsorption Coagulation Process Coagulants Aluminum Sulfate Ferric Chloride Adsorption 응집 공정 응집제 황산알루미늄 염화철 흡착