| abstract |
An object of the present invention is to provide a composite semipermeable membrane having excellent pollution resistance, in particular, microbial contamination characteristics, and a water treatment method using the composite semipermeable membrane. The present invention relates to a composite semipermeable membrane in which a skin layer containing a polyamide-based resin formed by reacting a polyfunctional amine component with a polyfunctional acid halide component is formed on the surface of a porous support. An antimicrobial layer containing a silver antimicrobial agent and a polymer component is formed, and the weight ratio of the silver antimicrobial agent and the polymer component in the antimicrobial layer is 55:45 to 95: 5 (silver antimicrobial agent: polymer component). will be. |