High-efficiency bacteriostatic material modified by nano zinc oxide and polyelectrolyte diallyl dimethylammonium chloride based on red mud.

After depositing nano zinc oxide on the surface of red mud granule material by one-step hydrothermal method, a layer of cationic polyelectrolyte diallyldimethylammonium chloride is coated to obtain nano zinc oxide-cation polyelectrolyte diallyl dimethylammonium chloride (PDDA) modified red mud granule material. The modified granule material were characterized and tested. The results showed that the modified granule material has significant antibacterial activity against E. coli. And maintain a good antibacterial effect in multiple rounds of antibacterial cycle experiments. The nano zinc oxide-PDDA modified red mud granule material is convenient to prepare, low in cost, excellent in performance and easy to separate, which is beneficial to reduce microbial pollution of water bodies and risk of disinfection by-products.