Compositions and sources of organic acids in fine particles(PM_(2.5)) over the Pearl River Delta region, south China

查看全文 作　　者：Xiuying [1]Zhao;Xinming [1]Wang;Xiang [1]Ding;Quanfu [1]He;Zhou [1]Zhang;Tengyu [1]Liu;Xiaoxin [1]Fu;Bo [1]Gao;Yunpeng [1]Wang;Yanli [1]Zhang;Xuejiao [2]Deng;Dui [2]Wu

机构地区：[1]State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences;[2]Institute of Tropical and Marine Meteorology, China Meteorological Administration

出　　处：《Journal of Environmental Sciences》索引2014年第26卷第1期,共12页

基　　金：supported by the National Natural Science Foundation of China(No.41025012,40673074);NSFC-Guangdong Joint Natural Science Foundation(No.U0833003) 摘　　要：Organic acids as important constituents of organic aerosols not only influence the aerosols' hygroscopic property, but also enhance the formation of new particles and secondary organic aerosols. This study reported organic acids including C14–C32fatty acids, C4–C9dicarboxylic acids and aromatic acids in PM2.5collected during winter 2009 at six typical urban, suburban and rural sites in the Pearl River Delta region. Averaged concentrations of C14–C32fatty acids, aromatic acids and C4– C9 dicarboxylic acids were 157, 72.5 and 50.7 ng/m3, respectively. They totally accounted for 1.7% of measured organic carbon. C20–C32fatty acids mainly deriving from higher plant wax showed the highest concentration at the upwind rural site with more vegetation around, while C14–C18fatty acids were more abundant at urban and suburban sites, and dicarboxylic acids and aromatic acids except 1,4-phthalic acid peaked at the downwind rural site. Succinic and azelaic acid were the most abundant among C4–C9dicarboxylic acids, and 1,2-phthalic and 1,4-phthalic acid were dominant aromatic acids. Dicarboxylic acids and aromatic acids exhibited significant mutual correlations except for 1,4-phthalic acid, which was probably primarily emitted from combustion of solid wastes containing polyethylene terephthalate plastics. Spatial patterns and correlations with typical source tracers suggested that C14–C32fatty acids were mainly primary while dicarboxylic and aromatic acids were largely secondary. Principal component analysis resolved six sources including biomass burning, natural higher plant wax, two mixed anthropogenic and two secondary sources; further multiple linear regression revealed their contributions to individual organic acids. It turned out that more than 70% of C14–C18fatty acids were attributed to anthropogenic sources, about 50%–85% of the C20–C32fatty acids were attributed to natural sources, 80%–95% of dicarboxylic acids and 1,2-phthalic acid were secondary in contrast with that 81% of 1,4-phthalic acid was primary. 关键词：主成分分析法珠江三角洲地区有机酸 PM2 5 细颗粒物中国南方二次有机气溶胶聚对苯二甲酸乙二醇酯

相关文献

参考文献（71）
引证文献（7）
耦合文献（96）

参考文献(71)

引证文献(7)

耦合文献(96)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Compositions and sources of organic acids in fine particles(PM_(2.5)) over the Pearl River Delta region, south China

参考文献(71)

引证文献(7)

耦合文献(96)

用户提示