盐城市典型公共场所室内空气PM_(2.5)质量浓度调查

Indoor Air PM_(2.5) Pollution of Representative Public Places in Yancheng City

目的了解盐城市典型公共场所室内PM_(2.5)污染状况,研究室外PM_(2.5)质量浓度对室内的影响,为监管部门控制公共场所PM_(2.5)暴露水平提供科学依据。方法在盐城市区选4家典型公共场所作为监测对象,采用光散射式粉尘仪对室内PM_(2.5)质量浓度进行监测,同时记录环保部门公布的同时段PM_(2.5)质量浓度。结果 4家公共场所室内PM_(2.5)平均质量浓度为95.0μg/m3,是室外的1.68倍。室内PM_(2.5)平均质量浓度显著高于室外,差异有统计学意义(P<0.01)。室外质量浓度冬季显著高于秋季(P<0.01),室内质量浓度冬秋季无明显差别(P>0.05)。室内外质量浓度呈高度正相关(R=0.779,P<0.001)。结论盐城市典型公共场所室内PM_(2.5)污染较重,确保集中式空调正常运行和严格控制吸烟和油烟等措施可有效降低室内PM_(2.5)质量浓度。

Objectives To investigate the concentration of fine particulate matters（ PM_（2.5）） in indoor air of representative public places in Yancheng city and compare the contribution of outdoor air pollution to that of indoor air pollution,so as to provide a scientific basis for regulatory control of PM_（2.5）exposure in public places.Methods The concentration of PM_（2.5）in indoor air from four representative public places in Yancheng city were monitored by means of a light scattering dust detector,and the concentration of PM_（2.5）in atmospheric environment released by the local Environmental Protection Department were recorded at the same time. Results The average concentration of indoor PM_（2.5）was 95. 0μg / m3,which was 1. 68 times higher than that of outdoor PM_（2.5）（ P 〈0. 01）.The level of PM_（2.5）in outdoor air was significantly higher in the winter than that in the autumn（ P 〈0. 01）,and the situation was similar to that of indoor air（ 〉P 0. 05）. Significantly positive correlation between indoor PM_（2.5）and outdoor PM_（2.5）was observed（ R = 0. 779,P〈 0. 001）. Conclusions There was a heavy PM_（2.5）pollution in the indoor air of representative public places in Yancheng city,and it could be effectively reduced in case of reasonably using central air-conditioning system and strictly controlling tobacco smoking and oil-smoke release.