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北京地铁6号线涂“光触媒”除味儿 细菌总数减少80%

2018-07-01 07:36:00    新华网

涂完两层光触媒后,为了让光触媒涂层在车厢中形成膜,并充分发挥作用,车厢封闭静置了3到4个小时。最后,实验人员再次对车厢内的空气进行检测。

检测结果显示,使用光触媒后车厢内部的空气质量有了明显提升,空气中甲醛和苯的含量分别下降了64%和50%,细菌总数减少了80%。“当然,在使用光触媒之前,车厢内的空气也是达标的。”刘畅说。

【安全】

  无色无味对人体没影响

实验结束后,光触媒开始批量运用到6号线所有列车车厢。从6月初施工至今,6号线所有64辆列车已基本完成光触媒的喷涂,预计下周工程将全部完工。喷涂一次光触媒产品的有效期为3个月,之后需要继续在车厢内进行补喷。刘畅介绍,安装光触媒的时间也错开了早晚高峰期,尽量减少对乘客的干扰,施工时间基本上在9点到13点,以及19点半到23点半。

目前在地铁中使用的光触媒产品是无色无味的,对人体没有影响,乘客在乘车过程中不会对它产生直接的感受,“或许有的乘客能闻出车厢内气味的变化。”刘畅说。

记者随机采访了乘坐6号线的几位乘客。市民刘先生住在6号线青年路站附近,平时经常乘坐6号线出行,当被告知车厢内安装了光触媒后,“没注意到。”他说。另一位在京工作的吴女士同样也没有注意到车厢内有明显变化,“可能空气稍微好了一些。”

6号线地铁是光触媒产品在北京地铁的第一个试点,“之所以选择先在6号线使用光触媒,是因为6号线早晚高峰期满载率比较高,车厢内人多拥挤,异味和细菌相对多一些。”刘畅说。

据刘畅介绍,如果光触媒在地铁6号线的试用情况良好,下一步可能将光触媒推广到全市地铁线路。

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