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Reverse osmosis composite membrane is no longer afraid of bacteria and pollution

来源:科技日报 作者: 阅读:21730 网友评论0 Updated: 2016-12-19 15:09 Source: Science and Technology Daily Author: Read: 21730 2010 0 comments

Professor Meng Jianqiang and Dr. Pan Ying from Tianjin University of Technology have made breakthroughs in the preparation of antibacterial and antifouling reverse osmosis composite membranes, and introduced antifouling and antibacterial components into the membrane surface in one step. This membrane can effectively inhibit organic, inorganic salts and microbial pollution in water, and the bacteriostatic rate is as high as 98% or more. Related papers have recently been published in the Journal of Materials Chemistry A, a well-known international chemical journal in the field of materials.

Facing the increasingly severe water shortage situation, reverse osmosis (RO) has become the mainstream water treatment technology. However, membrane fouling has always been a major obstacle affecting the further development of reverse osmosis technology and restricting its operating costs. In response to the above problems, Professor Meng Jianqiang's research group tried to perform multi-functional modification on the surface of the RO membrane through a multi-component reaction. At the same time, the anti-pollution component and the anti-bacterial component were introduced into the surface of the membrane at the same time. Antibacterial and antifouling reverse osmosis membrane.

This method not only expands the scope of the pollutants, but also simplifies the reaction steps and conditions. When the modified RO composite membrane was filtered for BSA and high hardness inorganic salt aqueous solution, the permeation flux attenuation rate was much lower than that of the original membrane, and the recovery rate was also significantly improved after a short time cleaning. In addition, when cultured with bacteria, The bacterial concentration was significantly reduced compared with the original membrane, and the bacteriostatic rate was as high as 98% or more. Compared with the conventional one-step reaction method in the literature that can only complete a single component modification, the operation is simple, the conditions are mild, and the advantages of efficiency and economy are taken into account.

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