TiO_2/GAC光催化剂对中水杀菌效果的研究

探讨了利用太阳光作光源,固定在颗粒活性炭上的二氧化钛光催化剂(T iO2/GAC)对中水除菌效果的影响因素.实验表明细菌的浓度范围在5.7×107~5.7×102cfu/mL时,光催化除菌率为86.1%~99.5%.光照强度在1.35 mW/cm2时,除菌率达96.6%.光照加T iO2/GAC 3 h时,99%以上的菌体死亡.仅光照无T iO2/GAC时除菌效果甚微,只有15.4%的菌体失活;仅有T iO2/GAC无光照,除菌率为42.3%.

BACTERICIDAL EFFECT OF TiO2/GAC PHOTOCALYST ON RECLAIMED WATER

Factors influencing the photocalytic sterilization of reclaimed water under solar irradiating with TiO_2/GAC were investigated in this paper. While the concentration of bacteria cell ranges from 5.7×10~7 to 5.7×10~2 cfu/mL, the efficiencies of the photocatalytic sterilization are in the range of 86.1% ～99.5%. When the light-intensity reaches 1.35 mW/cm~2, the efficiency of sterilization becomes 96.6%. When light with TiO_2/GAC for 3 h, more than 99% of bacterial cells were dead. Lighting only, without TiO_2/GAC there is slightly effect on bacteria survival, only 15.4% of the cell lost viability. On the contrary,only TiO_2/GAC, without lighting the effect of sterilization is 42.3%.