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Two-Dimensional Silicon Fingerprints Reveal Dramatic Variations in the Sources of Particulate Matter in Beijing during 2013-2017
Yang, Xuezhi; Lu, Dawei; Tan, Jihua; Sun, Xu; Zhang, Qinghua; Zhang, Luyao; Li, Yong; Wang, Weichao; Liu, Qian; Jiang, Guibin
2020-06-16
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN0013-936X
Volume54Issue:12Pages:7126-7135
AbstractSince the implementation of the Air Pollution Prevention and Control Action Plan (APPCAP) in 2013, the air quality in China has been greatly improved but still much exceeded the WHO guideline limit. Here we employed a novel approach, two-dimensional Si fingerprints, including stable Si isotopic composition (delta Si-30 and Si abundance (Si%), to investigate the annual variations in both primary and secondary sources of PM2.5 in Beijing during the APPCAP period (2013-2017). The (delta Si-30 and Si% values were used as tracers to reflect the variations in primary and secondary sources, respectively. For primary sources, the mean delta Si-30 value of PM2.5 in 2015-2017 (>-0.5 parts per thousand) was significantly more positive than that of 2013 (-1.24 parts per thousand), indicating a dramatic decline in the contribution of 30 Si-depleted sources (i.e., coal burning and industrial emission). For secondary sources, the mean Si% of PM2.5 increased from 1.2% in 2013 to 4.6% in 2017, suggesting a large decrease in the secondary aerosol contribution from 83% to 42%. It is worth noting that we found the Si-30-depleted sources showed a rebound trend during 2015-2017. This study reveals the responses of anthropogenic emission sources under strong regulation policies and provides a reference for future policymaking in Beijing and other polluted regions and countries.
Department环境化学与生态毒理学国家重点实验室
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/44844
Collection环境化学与生态毒理学国家重点实验室
Recommended Citation
GB/T 7714
Yang, Xuezhi,Lu, Dawei,Tan, Jihua,et al. Two-Dimensional Silicon Fingerprints Reveal Dramatic Variations in the Sources of Particulate Matter in Beijing during 2013-2017[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2020,54(12):7126-7135.
APA Yang, Xuezhi.,Lu, Dawei.,Tan, Jihua.,Sun, Xu.,Zhang, Qinghua.,...&Jiang, Guibin.(2020).Two-Dimensional Silicon Fingerprints Reveal Dramatic Variations in the Sources of Particulate Matter in Beijing during 2013-2017.ENVIRONMENTAL SCIENCE & TECHNOLOGY,54(12),7126-7135.
MLA Yang, Xuezhi,et al."Two-Dimensional Silicon Fingerprints Reveal Dramatic Variations in the Sources of Particulate Matter in Beijing during 2013-2017".ENVIRONMENTAL SCIENCE & TECHNOLOGY 54.12(2020):7126-7135.
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