光催化剂对病房空气中细菌的作用

为了解光催化剂对病房空气中细菌消除效果 ,用平板沉降法采样进行了实际观察。结果 ,将 3盆涂抹有光催化剂的绢花放于可见光照的病房内 (2 3m3 ) ,4 8h后空气中自然菌菌数平均下降率为 2 5 .2 4 % ;12 0h后 ,平均下降率为 5 8.95 %。停止使用光催化剂之后 ,空气中细菌数恢复到原来水平。 15个病房内放置含光催化剂绢花 ,4 8h后有 6个病房无效 ,放置 12 0h后仍有 4个病房无效。结论 ,光催化剂对病房空气中细菌消除效果达不到卫生要求 ,只有部分房间显示出一定消除效果。

EFFECT OF PHOTOCATALYST ON BACTERIA IN AIR OF WARD

In order to know the efficacy of photocatalyst in eliminating the bacteria in air of ward, plate sedimentation sampling method was used for practical observation. Results: Three pots of silk flower smeared with photocatalyst were put in the ward (23 m3) irradiated by visible light. The natural bacteria in air decreased by 25.24% in average after 48 h and by 58.95% in average after 120 h. After discontinuation of use of photocatalyst, the bacterial count in air returned to the original level. The silk flowers containing photocatalyst were put in 15 wards, 6 of which were ineffective after 48 h and 4 of which were still ineffective after 120 h. Conclusion: The efficacy of photocatalyst in eliminating air bacteria in ward did not fulfil the sanitary requirement and only a part of the rooms showed certain eliminating efficacy.