| 摘要 |
PURPOSE:To remove cations and fine particles simultaneously from waste liquid of pharmaceutical industries, fermentation in dustries or waste water by using a porous film comprising a specified polymer having functional groups contg. phosphoric or phosphitic groups in the side chains and having a specified mean pore size and a specified porosity. CONSTITUTION:Porous films comprising polyolefin, copolymer of polyolefin with halogenated olefin, polysulfone, or polyvinylidene fluoride, and having 0.01-5mu mean pore size and 20-80% porosity, is grafted with glycidyl methacrylate under irradiation with electron beam. Further, 0.1-5 milliequivalent functional group contg. phosphoric or phosphitic group per 1g film is introduced into side chains of the polymer constituting the porous film by allowing the film to react in aq. phosphoric acid, etc. Aq. liquid such as waste liquid produced from a pharmaceutical industry or fermentation industry, or waste water of general industry, or waste water contg. radioactive materials, is treated with the porous film prepd. by this method and cations such as metal ions in the aq. liquid, and colloidal or fine particles such as particles generated from clad, etc. are removed simultaneously.
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