Abstract:Air particulate matter samples from three Beijing-Tianjin-Hebei megacities, a reference and four national background sites were collected. 68 elements in PM10 and PM2.5 were analyzed with microwave-assisted digestion and inductively coupled plasma mass spectrometry (ICP-MS). The results showed that the daily mass concentrations of PM10 and PM2.5 in three Beijing-Tianjin-Hebei megacities were much higher than the relevant Chinese air quality standards. The concentrations in heating season were much higher than those in non- heating season. The ratios of PM2.5/PM10 were higher than 0.5, which indicated PM2.5 was the main component of PM pollution. The concentrations of PM10 and PM2.5 in national background sites changed slightly in seasons and were lower than the air quality standards and the city sites. The concentrations of Na, Mg, Al, S, K, Ca Fe and Zn were in the range of 0.1~10μg/m3; P, Ti, Mn, Ni, Cu, Ba and Pb 10~100ng/m3; Cd、Co、Ge、Ga、Zr、Sr and V 0.01~10ng/m3. The contents of S, Na, K, Al, Fe, Mg and Ca were all higher than 1%. The contents of the other elements including P, Zn, Pb, Cu and Ba were ranged in 0.1%~1%. The enrichment factors analysis revealed that K, Ca, Cr, Fe, Cu, Zn, As, Cd and Pb were enriched in PM2.5, which suggested the anthropogenic sources in this region. The enrichment factor ratio of heating season to non-heating season were 1.1~3.5. The factor analysis indicated that coal combustion, factory emissions and fuel combustion were primary sources of the air particulate matter pollution.
张霖琳, 王超, 刀谞, 滕恩江, 王业耀. 京津冀地区城市环境空气颗粒物及其元素特征分析[J]. 中国环境科学, 2014, 34(12): 2993-3000.
ZHANG Lin-Lin, WANG Chao, DAO Xu, TENG 恩Jiang, WANG Ye-Yao. Characterization of elements in air particulate matters in Beijing-Tianjin-Hebei megacities, China. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(12): 2993-3000.