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A composite membrane for reverse osmosis and method for water treatment with reverse osmosis with the aid of the same
A composite membrane for reverse osmosis and method for water treatment with reverse osmosis with the aid of the same
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机译:用于反渗透的复合膜和借助该膜的反渗透水处理方法
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摘要
A reverse osmosis composite membrane that has a high salt rejection, a high water permeability, and a high fouling tolerance, and permits practical desalination at a relatively low pressure is provided by coating the surface of a reverse osmosis membrane of aromatic polyamide with polyvinyl alcohol (PVA), for example, and controlling the surface zeta potential of the separation layer within +/- 10mV at pH 6. This reverse osmosis composite membrane is electrically neutral and controls the electrical adsorption of membrane-fouling substances having a charge group present in water. Therefore, a high separation property can be maintained without fouling the membrane even if water containing a surfactant or a transition metal component is supplied as raw water. IMAGE
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