居室环境PM_(2.5)浓度监测及影响因素分析

Indoor PM_(2.5) level and its influencing factors in Hangzhou

目的监测居室环境PM_(2.5)浓度,探索相关因素对居室环境PM_(2.5)浓度的影响。方法 2014年3月至2016年6月,采用Dylos1700型空气质量监测仪(Dylos)对杭州市主城区某住宅小区某居室内空气环境PM_(2.5)浓度进行监测。结果居室内外环境空气PM_(2.5)平均浓度差异有统计学意义(P=0.000),但无相关性(r=0.190,P>0.05);家庭烹饪活动影响室内PM_(2.5)浓度,二者之间有相关性(r=0.710,P<0.01);吸烟、喷洒杀虫气雾剂会使室内空气PM_(2.5)浓度快速增高,约1h后浓度回落到本底水平;空气净化器使用能有效降低室内PM_(2.5)浓度并保持在较低水平。结论居室内外环境PM_(2.5)浓度之间无相关性,家庭烹饪活动、吸烟、家用化学品使用会增加室内空气PM_(2.5)浓度,空气净化器可有效降低室内空气PM_(2.5)浓度。

Objective To monitor the indoor PM2.5 level and to discuss it＇s influencing factors. Methods The Dylos1700 air quality monitor（Dylos）was applied to monitor the indoor PM2.5 level in the urban community of Hangzhou city from March 2014 to June 2016. Results There was a significant difference between indoor and outdoor PM2.5 concentration（P=0.000）,but there was no significant correlation（r=0.190,P 〉0.05）.Cooking was closely related to indoor PM2.5 concentration（r=0.710,P〈0.01）.Smoking and spraying insecticide aerosol could rapidly increase the indoor PM2.5 level,which could drop down to base level in an hour.The use of air purifier could effectively lower the indoor PM2.5 level and maintain it at low level. Conclusions There was no significant correlation between outdoor and indoor PM2.5 concentration.Cooking,smoking and insecticide spraying can significantly elevate indoor ambient PM2.5 level,while air purifier can effectively reduce the level.