Improving Fouling Resistance of Seawater Desalination Membranes via Surface Modification
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.
Seawater Reverse Osmosis Membrane Fouling resistance Surface modification Contact Angle Surface Energy
Jong-Min Lee Hyun-Woong Lee Yeo-Jin Kim Hyung-Gyu Park Sung-Pyo Hong Ja-Young Koo
Woongjin Chemical Co.,Ltd 287, Gongdan-Dong, Gumi-City, Kyungbuk, Korea 730-030
国内会议
青岛
英文
123-130
2012-06-26（万方平台首次上网日期，不代表论文的发表时间）