水中のトリハロメタン及び塩素系有機溶剤の膜による除去(第1報) : 逆浸透膜による分離

概要

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In order to evaluate the availability of polymer membranes for separating volatile chlorinated organic compounds from water, the ability of several kinds of reverse osmosis (RO) membranes was examined to reject 4 trihalomethanes (THM : chloroform, bromdichloromethane, dibromochloromethane, bromoform) and 4 chlorinated organic solvents (COS : 1,1,1-trichloroethane, carbon tetrachloride, trichloroethylene, tetrachloroehylene) from water in this report. Samples containing chlorinated organic compounds of high and low concentrations, e.g., 25 mg/l and 100μg/l for chloroform, respectively, were tested by considering the application of RO membranes to waste water treatment. It was found that 1) polyamide and polyvinyl alcohol RO membranes showed higher removal rate than cellulose acetate RO membrane, especially aromatic polyamide RO membrane showed the highest rejection, 2) the removal rate decreased with increasing the volume of permeate, indicating that separation is due to adsorption in addition to reverse osmosis. More than 99% of 1,1,1-trichloroethane and carbon tetracloride were separated by using RO module consisting of spiral-wound aromatic polyamide membrane. Higher removal rate is expected to be achieved for other compounds by serial connection of RO modules.
公益社団法人日本薬学会の論文
1990-06-30