The Effects Of Traffic Environment Air Pollution On Fractional Exhaled Nitric Oxide

As the amount of motor vehicle emission continues to increase and urban air pollution conditions worsens, the emission is also becoming the main source of air pollution in China. Compared to other types of sources, vehicle exhausts directly discharge into surface layer, the effect to health would be more directly due to the overlapping of space and time with human activities.This study chose 39 adults as the research object, divided into four groups:wearing no mask, wearing ordinary mask, particle respirator and filter mask.They are exposed in rush hour traffic pollutants, measuring pollutant concentration and human respiratory system inflammatory marker FeNO simultaneously. and Different pollution level effect in human health and different intervention measures affect the health improvement of exposure crowds are evaluated.On Fukang Road, Tianjin, during heating period and non-heating period, NO2 median numbers were at 73.0μg/m3 and 80.0μg/m3, BC at 6.8μg/m3 and 6.1μg/m3, PM1 at 106.0μg/m3 and 86.0μg/m3, PM2.5 at 139.0μg/m3 and 96.0μg/m3, PM10 at 151.0μg/m3 and 91.0μg/m3, CO at 1.8ppm and 2.2ppm, respectively. During APEC, all pollutant concentration decreased. BC, CO, PM2.5, PM10 had high positive linear relation, PM1 also showed positive relation with CO, PM2.5 and PM10, indicating the same source, FeNO reached the maximum value at 4 hours after the end of exposure, showing that FeNO variation caused by traffic pollutant exposure had a 4-hour lag. ANOVA showed that FeNO(no mask) and FeNO(particle respirator) both had significant difference with FeNO(filter mask) (P<0.05), indicating that filter masks had significant intervention effect in traffic pollutant exposure. BC in unit concentration led to the most FeNO variation, then NO2, PM2.5 and PM10 had no significant effect on FeNO variation. Filter mask also had significant effect on the relation between FeNO and NO2. Particle respirator had better improvement effect than filter mask then ordinary mask in the aspect of BC. For PM2.5 and PM10, the improvement is greater than ordinary mask then filter mask.