Yang Yi-hong, Qu Qun, Liu Sui-xin, Li Xiong, Zhong Pei-yi, Tau Jun
Huan Jing Ke Xue. 2015 Aug;36(8):2758-67.
Aerosol samples of PM2.5 were collected simultaneously at 6 sites from five cities (Guangzhou urban, Conghua (suburban of Guangzhou), Foshan, Dongguan, Shenzhen and Zhubai) in Pearl River Delta region during the summer of 2010. The concentrations of organic carbon (OC), elemental carbon (EC) and water-soluble ions were determined by thermal/optical carbon analyzer and ion chromatography, respectively. The characteristics of PM2, OC, EC and ions, spatial distribution were discussed. Moreover, ambient light extinction coefficients were reconstructed by IMPROVE formula. The results showed that spatial distribution characteristics of PM2.5. and its chemical compositions were obviously different. The PM2.5 in Guangzhou, Foshan and Dongguan were higher than those in Zhuhai and Shenzhen. The contributions of (NH4)2SO4, OM, EC and NH4NO3 to ambient light extinction coefficient were 39%, 31%, 12% and 13%, respectively.
2010年夏季，在珠江三角洲地区的五个城市（广州市区、从化（广州郊区）、佛山、东莞、深圳和珠海）的6个地点同时采集了PM2.5气溶胶样本。有机碳（OC）、元素碳（EC）和水溶性离子的浓度分别通过热/光碳分析仪和离子色谱法测定。讨论了PM2.5、OC、EC和离子的特征及其空间分布。此外，利用IMPROVE公式重建了环境光消光系数。结果表明，PM2.5及其化学成分的空间分布特征明显不同。广州、佛山和东莞的PM2.5高于珠海和深圳。(NH4)2SO4, OM, EC和NH4NO3对环境光消光系数的贡献分别为39%、31%、12%和13%。
