作者单位:Woongjin Chemical Co.,Ltd 287, Gongdan-Dong, Gumi-City, Kyungbuk, Korea 730-030
母体文献:2012青岛国际脱盐大会论文集
会议名称:2012青岛国际脱盐大会
会议地点:青岛
主办单位:中国金属学会
语种:chi
分类号:TV1;TG1
摘要
A commercial polyamide seawater reverse osmosis (SWRO) membrane (Woongjin Chemical CSM) was surface-modified with fluoro-compounds. The effect of this surface modification on both water and salt permeability before and after organic fouling was investigated. The structural and electrical characteristics of the membrane surface were measured using Atomic Force Microscopy (AFM) and Electrokinetic Analysis (EKA) respectively. When modified, the membrane surface showed only slight changes to the surface roughness and surface charges. The modified membrane also showed highly improved fouling resistance during cross-flow filtration of characteristic seawater organic foulants (humic acid and sodium alginate). Contact angle analysis using the Owens-Wendt theory was used to calculate the surface energy of the modified membrane. Lower surface energy of the modified membrane was identified as the key factor in the improved fouling resistance of the membranes.