Concentration, source identification, and exposure risk assessment of PM2.5-bound parent PAHs and nitro-PAHs in atmosphere from typical Chinese cities.
Concentration, source identification, and exposure risk assessment of PM2.5-bound parent PAHs and nitro-PAHs in atmosphere from typical Chinese cities.
复制标题
中国典型城市大气中PM2.5结合母体PAHs和硝基PAHs浓度、来源识别及暴露风险评估
DOI：
10.1038/s41598-017-10623-4
复制
发表时间：
2017-09-04
影响因子：
4.6
通讯作者：
Li J
中科院分区：
文献类型：
--
作者：
Liu D;Lin T;Syed JH;Cheng Z;Xu Y;Li K;Zhang G;Li J
对中国市区9个采样点1年(2013年-2014年)的PM2.5样品中16种母体多环芳烃和12种硝基多环芳烃进行了测定。在采样期间，单个硝基多环芳烃的浓度比它们的母体多环芳烃低一个或两个数量级。在这项研究中观察到了典型的母体多环芳烃浓度的季节变化，与夏季相比，冬季的浓度增加了10-80倍。相反，大气中硝基多环芳烃的平均浓度在所有季节都是相似的，除了9-硝基菲(9n-Ant)。与其他二次生成的硝基多环芳烃相比，9n-Ant的浓度较高，占总硝基多环芳烃的比例较大。正矩阵分解结果表明，9n-Ant的来源包括生物质燃烧(20%)、汽车尾气排放(43%)和二次形成(30%)。总体而言，冬季观测到的母体多环芳烃浓度升高与所有地点的燃煤贡献有关，尤其是在中国北部(>；80%)。二次形成产物对总硝基多环芳烃的贡献在夏季测得，上海(84%)、北京(76%)、广州(60%)和成都(%)等大城市的贡献尤其大，这主要是由于夏季母体多环芳烃的浓度明显低于冬季。
Sixteen parent PAHs and twelve nitro-PAHs were measured in PM2.5 samples collected over one year (2013–2014) at nine urban sites in China. During the sampling period, concentrations of individual nitro-PAHs were one or two orders of magnitude lower than their parent PAHs. Typical seasonal variations in parent PAH concentrations, which increased 10- to 80- fold in winter compared to summer, were observed in this study. Conversely, the mean atmospheric concentrations of nitro-PAHs were similar in all four seasons, with the exception of 9-nitroanthracene (9n-Ant). Compared to other nitro-PAHs which were secondary formation products, 9n-Ant had a higher concentration and made up a larger proportion of total nitro-PAHs. Positive matrix factorization results indicated that 9n-Ant sources included biomass burning (20%), vehicle exhaust emissions (43%), and secondary formation (30%). Overall, the elevated concentrations of parent PAHs observed in winter correlated with the contribution from coal combustion at all sites, especially in north China (>80%). The contribution of secondary formation products to total nitro-PAHs was measured during the summer, and was especially high in the larger cities such as Shanghai (84%), Beijing (76%), Guangzhou (60%), and Chengdu (64%), largely due to the summer concentrations of parent PAHs were markedly lower than in winter.
登录
查看更多内容
影响因子：
9.8
作者：
Hassanvand, Mohammad Sadegh;Naddafi, Kazem;Yunesian, Masud
通讯作者：
Yunesian, Masud
影响因子：
4.5
作者：
Huang, Bo;Liu, Ming;Fu, Jiamo
通讯作者：
Fu, Jiamo
影响因子：
5.5
作者：
Lee, Ji Yi;Kim, Yong Pyo;Kang, Chang-Hee
通讯作者：
Kang, Chang-Hee
是时候向16个EPA PAH说再见了吗？朝着最新的PAC用于环境目的。
影响因子：
2.4
作者：
Andersson JT;Achten C
通讯作者：
Achten C
DOI：
10.1016/s0165-1218(96)90103-2
发表时间：
1996-12-20
期刊：
MUTATION RESEARCH-GENETIC TOXICOLOGY
影响因子：
--
作者：
Durant, JL;Busby, WF;Crespi, CL
通讯作者：
Crespi, CL