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Abstract Nanofiltration technology is a membrane separation technology separated from a reverse osmosis technology,and the continuation and development branch of ultra low pressure reverse osmosis technology. Nanofiltration membrane is a kind of charged membrane with electrical interaction has sensive molecular retention area,and is used to purify or remove the different substances purposefully.The relationship between membrane potential and concentration inorganic solution,and organic solution and pH value were studied to determine the membrane performance.
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