摘要
Particulate matter （PM） pollution in an underground car park in Wuhan was investigated. Mass concentrations of PM10 and PM2.5 were obtained using gravimetric method. Selected metal elements, such as Fe, Mn, Zn, Pb, and Cu in PM10 samples, were determined using atomic absorption spectrometer （AAS）. Beta attenuation method was applied to observe the hourly variation of PM10 levels. Results show that average PM10 concentrations at the entrance and at the exit were 101.3 μg/m3 and 234.4 μg/m3, respectively, and average PM2.5 concentrations at the entrance and at the exit were 47.7 μg/m3 and 62.7μg/m3, respectively. PM pollution was worse at the exit than at the entrance. Hourly PMlo concentration was weakly correlated with traffic flow. Regarding element concentrations, the most enriched element in PM10 samples was Fe. Re-suspension of soil dust at the exit is an important source of PM10.
Particulate matter （PM） pollution in an underground car park in Wuhan was investigated. Mass concentrations of PM10 and PM2.5 were obtained using gravimetric method. Selected metal elements, such as Fe, Mn, Zn, Pb, and Cu in PM10 samples, were determined using atomic absorption spectrometer （AAS）. Beta attenuation method was applied to observe the hourly variation of PM10 levels. Results show that average PM10 concentrations at the entrance and at the exit were 101.3 μg/m3 and 234.4 μg/m3, respectively, and average PM2.5 concentrations at the entrance and at the exit were 47.7 μg/m3 and 62.7μg/m3, respectively. PM pollution was worse at the exit than at the entrance. Hourly PMlo concentration was weakly correlated with traffic flow. Regarding element concentrations, the most enriched element in PM10 samples was Fe. Re-suspension of soil dust at the exit is an important source of PM10.
基金
supported by the Fundamental Research Funds for the Central Universities of China(Grant No. 2011PY049)
