Composition and sources of aerosol organic matter in a highly anthropogenic influenced semi-enclosed bay: Insights from excitation-emission matrix spectroscopy and isotopic evidence
Composition and sources of aerosol organic matter in a highly anthropogenic influenced semi-enclosed bay: Insights from excitation-emission matrix spectroscopy and isotopic evidence
复制标题
高度人为影响的半封闭海湾中气溶胶有机物的组成和来源：激发发射矩阵光谱和同位素证据的见解
DOI：
10.1016/j.atmosres.2020.104958
复制
发表时间：
2020-09
影响因子：
5.5
通讯作者：
Lijun Cui
中科院分区：
文献类型：
--
作者：
Yunchao Wu;Xiaoping Huang;Zhijian Jiang;Songlin Liu;Lijun Cui
气溶胶中的有机物是近岸沃茨有机碳、氮的重要外来来源。在这项研究中，我们研究了气溶胶中的有机物的成分，来源和形成过程中使用的激发-发射矩阵（EEM）光谱和稳定同位素。东北季风季气溶胶有机物（包括颗粒有机物（POM）和水溶性有机物（WSOM））的浓度高于西南季风季和台风季，这是由于珠江三角洲（PRD）、中国大陆东部和本地排放的有机气溶胶的贡献较大。稳定同位素（δ 13 C和δ 15 N）结合MixSIAR模型的结果表明，化石燃料燃烧（机动车尾气和燃煤）是气溶胶有机物的最重要来源，占全年气溶胶有机物输入总量的60%以上。EEM光谱的结果表明，蛋白质类和不含N的物种是气溶胶有机质的主要成分，而高含氧物种，主要是腐殖类物质（HULIS），仅在NEM季节确定。NEM季的高含氧物种可能是由于该季的严重污染导致较高的臭氧水平和增加的有机自由基导致的二次有机气溶胶的形成。
Organic matter in aerosols is an important allochthonous source of organic carbon and nitrogen in coastal waters. In this study, we investigated the constituents, sources, and formation process of organic matter in aerosols using excitation−emission matrix (EEM) spectroscopy and stable isotopes. The concentration of aerosol organic matter (AOM), including particle organic matter (POM) and water-soluble organic matter (WSOM), were higher in the northeast monsoon (NEM) season than in the southwest monsoon and typhoon (SWM) season due to the considerable contribution of organic aerosols from the Pearl River Delta (PRD), eastern mainland China and local emissions. The results of stable isotope (δ13C and δ15N) combined with a MixSIAR model showed that fossil fuel combustion (vehicle exhausts and coal combustion) was the most important source of aerosol organic matter, which contributed more than 60% of the total AOM input, throughout the year. The EEM spectroscopy results indicated that protein-like and non-N-containing species were the primary components of aerosol organic matter, while highly-oxygenated species, mostly humic-like substances (HULIS), were identified only in the NEM season. The highly-oxygenated species in the NEM season may be attributed to the formation of secondary organic aerosols induced by higher ozone levels and increased organic radical through the severe pollution in this season.
登录
查看更多内容
东沙岛大气沉降中水溶性硝酸盐的同位素组成：南海北部外部氮供应的来源和影响
影响因子：
4.9
作者：
Hsu, S. -C.;Dai, M. H.;Hsiao, S. S. -Y.;Kao, S. -J.
通讯作者：
Kao, S. -J.
DOI：
10.1016/j.atmosenv.2015.12.067
发表时间：
2016-03
期刊：
Atmospheric environment (Oxford, England : 1994)
影响因子：
--
作者：
Chalbot MG;Chitranshi P;da Costa GG;Pollock E;Kavouras IG
通讯作者：
Kavouras IG
影响因子：
5.2
作者：
通讯作者：
--
影响因子：
5.2
作者：
Xianliang Zhou;Andrew J. Davis;D. Kieber;W. Keene;J. Maben;H. Maring;E. Dahl;M. Izaguirre;R. Sander;L. Smoydzyn
通讯作者：
Xianliang Zhou;Andrew J. Davis;D. Kieber;W. Keene;J. Maben;H. Maring;E. Dahl;M. Izaguirre;R. Sander;L. Smoydzyn
影响因子：
5
作者：
H. Kawashima;Yuya Haneishi
通讯作者：
H. Kawashima;Yuya Haneishi