口罩对大气PM2.5中主要污染物的阻隔效果研究

Obstruction effect of masks to major pollutants in PM2.5

目的研究市售口罩对大气PM2.5中主要污染物的阻隔效率,以期指导消费者在雾霾天气合理选择和使用口罩。方法采用两台智能大气采样器分别采集环境空气和经口罩阻隔的空气中PM2.5,检测样品中16种多环芳烃、4种非金属离子、12种金属离子浓度。结果口罩对大气PM2.5及其中主要污染物均有不同的阻隔效果。5种专用防霾口罩的阻隔能力最强,阻隔效率高于66.6%;聚氨酯口罩和一次性医用口罩阻隔能力最差,阻隔效率低于25.7%。结论专用防霾口罩可有效阻隔大气PM2.5中的部分污染物。

Objective To know the removal effect of commercial masks on the major pollutants in PM2.5,and provide right guidance for consumers on choosing and using masks in haze days.Methods PM2.5 in ambient air and filtered air were collected and determined for 16 PAHs,four inorganic anions,12 metal ions quantitively.Results The removal rates presented differences for PM2.5 and pollutants in PM2.5 by masks,which revealed the highest removal rates of >66.6% by five anti-hazespecific masks,the lowest removal rates of < 25.7% were found in polyurethane masks and medical masks for single use. Conclusion The anti-haze-specific masks may obstruct most pollutants in PM2.5.