A comprehensive sub-type source profile of fine particle in China: chemical composition, markers, diagnostic ratios and implication for atmospheric chemistry

IF 8.5 1区地球科学 Q1 METEOROLOGY & ATMOSPHERIC SCIENCES

npj Climate and Atmospheric Science Pub Date : 2025-07-01 DOI:10.1038/s41612-025-01110-z

Shaofei Kong, Juan Cao, Xujing Qin, Tingting Wang, Xuan Xiang, Jian Wu, Shihua Qi, Yingying Yan, Yan Yin, Wei Liu, Feng Ding

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Abstract

Comprehensive PM_2.5 source profiles were established for 34 sub-types of sources, with markers and diagnostic ratios updated. OC, EC, SO₄²⁻, NO₃⁻, Si, Al, Mg, Ca, Ti, and Fe were dominant species. The maize straw, wheat straw, honeycomb coal burning, firework burning, barbeque and cooking are expected to be separated by receptor modeling. EC, Ca, Fe, and Mg can trace nearly all sources. New markers were identified, like Ti, V and Ni for coal-fired power plants. Ternary diagrams were proposed to identify K⁺-Na⁺-Ca²⁺ sources, and Fe existence form. OC/EC and (SNA + OC)/soot-EC ratio for indicating primary OC and mixing state of soot particles were assessed. Fe, Mn and Cu solubilities varied with magnitude differences according to their ratios to SO₄²⁻. For updating OC, EC, SO₄²⁻, NO₃⁻, P and Cl⁻ emission inventories, anthropogenic dust should be included. The results are helpful for improving knowledge on aerosol chemical transformation and biogeochemical cycle.

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中国细颗粒物综合亚型源剖面：化学成分、标志物、诊断比率及其大气化学意义

建立了34个子类型的PM2.5综合源谱，更新了标志物和诊断率。OC、EC、SO42−、NO3−、Si、Al、Mg、Ca、Ti和Fe为优势种。玉米秸秆、小麦秸秆、蜂窝煤燃烧、烟花燃烧、烧烤和烹饪有望通过受体建模进行分离。EC, Ca， Fe和Mg几乎可以追踪所有来源。发现了新的标记物，如燃煤电厂的Ti、V和Ni。提出了三元图来确定K+-Na+-Ca2+来源和Fe的存在形式。评价了指示初级OC和煤烟混合状态的OC/EC和(SNA + OC)/煤烟-EC比值。Fe、Mn和Cu的溶解度随其与SO42−的比值不同而不同。更新OC、EC、SO42−、NO3−、P和Cl−排放清单时，应包括人为扬尘。研究结果有助于提高对气溶胶化学转化和生物地球化学循环的认识。

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来源期刊

npj Climate and Atmospheric Science Earth and Planetary Sciences-Atmospheric Science

CiteScore

8.80

自引率

3.30%

发文量

审稿时长

21 weeks

期刊介绍： npj Climate and Atmospheric Science is an open-access journal encompassing the relevant physical, chemical, and biological aspects of atmospheric and climate science. The journal places particular emphasis on regional studies that unveil new insights into specific localities, including examinations of local atmospheric composition, such as aerosols. The range of topics covered by the journal includes climate dynamics, climate variability, weather and climate prediction, climate change, ocean dynamics, weather extremes, air pollution, atmospheric chemistry (including aerosols), the hydrological cycle, and atmosphere–ocean and atmosphere–land interactions. The journal welcomes studies employing a diverse array of methods, including numerical and statistical modeling, the development and application of in situ observational techniques, remote sensing, and the development or evaluation of new reanalyses.