Wu Shui-Ping, Qian Ran-Ran, Lee Tsung-Chang, Wang Xing-Hong, Hong Hua-Sheng, Yuan Chung-Shin
State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China.
J Environ Monit. 2012 Apr;14(4):1221-30. doi: 10.1039/c2em10840b. Epub 2012 Mar 8.
From March 2008 to February 2009, PM(10) samples were collected and analyzed for polycyclic aromatic hydrocarbons (PAHs) at eight sampling sites in Great Xiamen Bay, China. Analyses of the seasonal and spatial variations of these compounds revealed the following results. Significantly high levels of PAHs were found in the winter compared to the summer, sometimes exceeding 100 ng m(-3), and the spatial variations were influenced most by the sampling site surroundings. Composition profiles of PAHs of an urban and a rural site were shown to be very similar with a positive correlation coefficient larger than 0.9 at the 0.01 level of significance for the same season. Diagnostic ratios, together with principal component and multiple linear regression analysis, showed that more PAHs were from grass/wood/coal combustion in winter than in other seasons. The ratios of benzo[a]pyrene to benzo[e]pyrene (BaP-BeP) in winter and fall were 0.6-1.7 times higher than those in spring and summer, suggesting the importance of local emissions of PAHs. The BaP-BeP ratios in Kinmen were generally lower than those in Xiamen, indicating that the aging degree of PAHs was higher in Kinmen than in Xiamen. The external input of PAHs from upwind urban and industrial areas was one of the key factors causing high levels of PAHs in PM(10) in Great Xiamen Bay in winter.
2008年3月至2009年2月，在中国大厦门湾的8个采样点采集了PM(10)样本，并对其进行了多环芳烃（PAHs）分析。对这些化合物的季节和空间变化分析得出以下结果。与夏季相比，冬季PAHs含量显著较高，有时超过100 ng m(-3)，且空间变化受采样点周边环境影响最大。同一季节，城市和农村采样点PAHs的组成分布非常相似，在0.01显著性水平下，正相关系数大于0.9。诊断比值以及主成分和多元线性回归分析表明，冬季来自草/木/煤燃烧的PAHs比其他季节更多。冬季和秋季苯并[a]芘与苯并[e]芘（BaP-BeP）的比值比春季和夏季高0.6 - 1.7倍，表明PAHs本地排放的重要性。金门的BaP-BeP比值普遍低于厦门，表明金门PAHs的老化程度高于厦门。冬季大厦门湾PM(10)中PAHs含量高的关键因素之一是来自上风方向城市和工业区PAHs 的外部输入。
