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将真空热分解制得的载银硅藻土用于水体的消毒中,检测了抗菌材料对水体中大肠杆菌的杀灭情况,分析了水样温度及pH值对抗菌材料抗菌性能的影响,并测定了处理水样中的银离子质量浓度.结果表明:银含量为1.46%的载银硅藻土在30min内即可完全杀灭水样中的大肠杆菌;水样温度越高、pH值越大,载银硅藻土的抗菌性能越强.无论是浸泡还是过滤水样中银离子质量浓度均低于50μg/L.因此,载银硅藻土是一种安全、有效的抗菌材料.
The silver diatomaceous earth prepared by vacuum pyrolysis was used in the disinfection of water body. The killing effect of antibacterial material on Escherichia coli in water was tested. The influence of temperature and pH of water sample on the antibacterial property of antibacterial material was analyzed. The concentration of silver ions in the treated water sample was measured.The results showed that the silver-loaded diatomite with the silver content of 1.46% can completely kill E. coli in water sample within 30 min. The higher the temperature of the water sample, the more the pH value The silver-diatomaceous earth contained silver diatomaceous earth with stronger antibacterial properties, and the silver ion concentration in the soaking or filtering water samples was less than 50μg / L. Therefore, silver-loaded diatomaceous earth is a safe and effective antibacterial material.