Nitrogen isotopic composition of free Gly in aerosols at a forest site

被引：16

作者：

Zhu, Ren-guo ^{[1
,2
]}

Xiao, Hua-Yun ^{[1
,2
]}

Lv, Zhe ^{[1
]}

Xiao, Hao ^{[2
]}

Zhang, Zhongyi ^{[1
]}

Zheng, Nengjian ^{[1
]}

Xiao, Hongwei ^{[1
]}

机构：

[1] East China Univ Technol, Jiangxi Prov Key Lab Causes & Control Atmospher P, Nanchang 330013, Jiangxi, Peoples R China

[2] Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Peoples R China

来源：

ATMOSPHERIC ENVIRONMENT | 2020年 / 222卷

基金：

中国国家自然科学基金;

关键词：

delta N-15; Free glycine; Biomass burning; Fossil fuel; FREE AMINO-ACIDS; FINE PARTICULATE MATTER; ORGANIC NITROGEN; ATMOSPHERIC AEROSOLS; CHINA; EMISSIONS; CARBON; COMBUSTION; POLLUTION; FRACTIONS;

D O I：

10.1016/j.atmosenv.2019.117179

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The nitrogen isotope composition of free glycine (delta N-15(F-Gly)) in atmospheric particulates from different sources was measured to explore whether delta N-15(F-Gly) could be used to indicate the sources of particulates. We found that the delta N-15(F-Gly) released by biomass combustion (range: +16.9 to +27.3 parts per thousand) was significantly higher than that from natural sources (up to 21.6 parts per thousand). The concentration of free Gly in particulates released from fossil fuel combustion (bituminite combustion and vehicle emission) was very low. These results provided the possibility for using the delta N-15(F-Gly), values in aerosol to distinguish biomass combustion from natural sources. In the field, a high correlation between the free Gly concentrations in aerosol and nonsea salt potassium (nss-K+) was observed. The delta N-15(F-Gly) values showed the same temporal pattern with fire points and a link between the delta N-15(F-Gly), values and nss-K+ levels was found. These results suggested that the delta N-15(F-Gly) value in aerosol might be a good indicator for biomass burning.

引用

页数：9

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