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| 夏季珠江三角洲地区PM2.5化学组分特征及其对大气能见度的影响 | |
| 引用本文： | 杨毅红,瞿群,刘随心,李雄,钟佩仪,陶俊.夏季珠江三角洲地区PM2.5化学组分特征及其对大气能见度的影响[J].环境科学,2015,36(8):2758-2767. |
| 作者姓名： | 杨毅红 瞿群 刘随心 李雄 钟佩仪 陶俊 |
| 作者单位： | 1. 电子科技大学中山学院，化学与生物工程学院，中山 528402; 环境保护部华南环境科学研究所，广州 510655 2. 环境保护部华南环境科学研究所,广州,510655 3. 中国科学院地球环境研究所,西安,710075 4. 广西气象服务中心,南宁,530022 |
| 摘 要： | 于2010年夏季在珠三角主要城市广州、佛山、东莞、深圳、珠海以及广州郊区从化同步采集PM2.5样品,利用热光反射碳分析仪和离子色谱分别分析样品中有机碳/元素碳和水溶性离子浓度,并同步收集能见度和气象数据.在此基础上对珠三角主要城市大气PM2.5中主要化学成分的浓度水平和空间分布特征进行分析,并利用IMPROVE方程重建大气消光系数,探讨PM2.5的主要化学组分对大气能见度的影响.结果发现,观测期间珠三角地区PM2.5中的主要化学成分空间分布特征明显,广州、佛山和东莞浓度较高,珠海和深圳浓度较低.(NH4)2SO4、有机物(OM)、EC和NH4NO3对夏季珠三角大气消光系数贡献率分别为39%、31%、12%和13%. |
| 关 键 词： | 霾 空间分布 PM2. 5 化学组分 大气能见度 |
| 收稿时间： | 2014/11/24 0:00:00 |
| 修稿时间： | 2015/3/21 0:00:00 |
Chemical Compositions in PM2.5 and Its Impact on Visibility in Summer in Pearl River Delta, China |
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| YANG Yi-hong,QU Qun,LIU Sui-xin,LI Xiong,ZHONG Pei-yi and TAO Jun.Chemical Compositions in PM2.5 and Its Impact on Visibility in Summer in Pearl River Delta, China[J].Chinese Journal of Environmental Science,2015,36(8):2758-2767. | |
| Authors: | YANG Yi-hong QU Qun LIU Sui-xin LI Xiong ZHONG Pei-yi and TAO Jun |
| Institution: | School of Chemistry and Biology, Zhongshan Institute, University of Electronic Science and Technology of China, Zhongshan 528402,China;South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China;South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China;Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China;Guangxi Meteorological Service Center, Nanning 530022,China;South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China;South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China |
| Abstract: | Aerosol samples of PM2.5 were collected simultaneously at 6 sites from five cities (Guangzhou urban, Conghua (suburban of Guangzhou), Foshan, Dongguan, Shenzhen and Zhuhai) 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 PM2.5, 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. |
| Keywords: | haze spatial distribution PM2 5 chemical composition visibility |
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