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RESEARCH ARTICLE
Contents Vol 21(3)

Characteristics, potential sources and interaction of carbonaceous components in PM2.5 in two adjacent areas in Shanxi, China

Xiaofeng Liu https://orcid.org/0000-0002-6019-4965 A * , Xin Tan A , Xinyang Li A , Xuan Li A , Yuhuan Cheng A and Kun Wang A
+ Author Affiliations
- Author Affiliations

A College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, PR China.

* Correspondence to: liuxiaofeng01@tyut.edu.cn

Handling Editor: Graeme Batley

Environmental Chemistry 21, EN23106 https://doi.org/10.1071/EN23106
Submitted: 24 October 2023  Accepted: 12 April 2024  Published: 6 May 2024

© 2024 The Author(s) (or their employer(s)). Published by CSIRO Publishing.

Abstract

Environmental context

Carbonaceous components in PM2.5 have a negative effect on the environment, human health and climate. We explored the pollution characteristic, potential sources and interaction of carbonous aerosols in two adjacent areas in Shanxi, China. The concentration levels of organic carbon and elemental carbon were of a moderate level of all those measured between 2009 and 2020. Vehicle exhaust and coal combustion were the two main sources, and Yuci may be affected by the regional transport of Taiyuan in winter.

Rationale

Carbonaceous aerosols seriously affect people’s health and have a strong scattering effect on visible light. Pollution cuased by carbonaceous components in Taiyuan is serious. Numerous universities in Taiyuan have been moving to Yuci college town since 2013, and the amount of organic pollutants has increased gradually with the growing population. It is necessary to study the characteristics and relationship of carbonaceous aerosols in these two adjacent areas.

Methodology

PM2.5 samples were collected in Taiyuan and Yuci college town in 2017 and 2018, and eight carbonaceous components were analysed using a Sunset Laboratory analyser. Pollution characteristic, potential sources and interaction of carbonous aerosols in the two adjacent areas were investigated.

Results

The average organic carbon (OC) and elemental carbon (EC) concentrations were 12.6 and 6.8 µg m−3 in Taiyuan and 11.7 and 6.9 µg m−3 in Yuci. The OC and EC concentrations in Taiyuan can be approximately divided into three levels between 2009 and 2020, and the OC and EC levels in Taiyuan studied here (2017 and 2018) were in the middle level. The OC and EC concentrations were higher when the temperature was lower.

Discussion

The OC concentration in December was the highest among three winter periods, which may be caused by secondary organic carbon formation related to the lower temperature and an inversion layer. Four source categories were identified using positive matrix factorisation, namely secondary source (25.0%), dust source (16.6%), vehicle exhaust (27.0%) and coal combustion (31.4%). In Taiyuan and Yuci, the trajectory clusters were mainly from north-west and west in winter, whereas the air masses not only originated from north-west, but also north and south in autumn. Yuci may be affected by Taiyuan's regional transport in winter. The results clarify the characteristics of carbon aerosols in the two adjacent areas, and provide fundamental data for the prevention and control of regional air pollutants.

Keywords: air pollution, backward trajectories, correlation analysis, elemental carbon, organic carbon, PM2.5, positive matrix factorisation, source apportionment.

References

Birch ME, Cary RA (1996) Elemental carbon-based method for monitoring occupational exposures to particulate diesel exhaust. Aerosol Science and Technology 25, 221-241.
| Crossref | Google Scholar |

Boamponsem LK, Hopke PK, Davy PK (2024) Long-term trends and source apportionment of fine particulate matter (PM2.5) and gaseous pollutants in Auckland, New Zealand. Atmospheric Environment 322, 120392.
| Crossref | Google Scholar |

Brown SG, Eberly S, Paatero P, Norris GA (2015) Methods for estimating uncertainty in PMF solutions: examples with ambient air and water quality data and guidance on reporting PMF results. Science of the Total Environment 518–519, 626-635.
| Crossref | Google Scholar | PubMed |

Bureau of Ecology and Environment of Taiyuan (2017) 2017 年太原市环境状况公报 [Bulletin on the State of the Environment in Taiyuan City, 2017.] (太原市生态环境局: Taiyuan City, PR China) Available at https://hbj.taiyuan.gov.cn/tjnbgb/20180823/651448.html [In Chinese]

Cao JJ, Lee SC, Ho KF, Zhang XY, Zou SC, Fung K, Chow JC, Watson JG (2003) Characteristics of carbonaceous aerosol in Pearl River Delta Region, China during 2001 winter period. Atmospheric Environment 37(11), 1451-1460.
| Crossref | Google Scholar |

Cao JJ, Lee SC, Zhang XY, Chow JC, An ZS, Ho KF, Watson JG, Fung K, Wang YQ, Shen ZX (2005a) Characterization of airborne carbonate over a site near Asian dust source regions during spring 2002 and its climatic and environmental significance. Journal of Geophysical Research 110(D3), D03203.
| Crossref | Google Scholar |

Cao JJ, Wu F, Chow JC, Lee SC, Li Y, Chen SW, An ZS, Fung KK, Watson JG, Zhu CS, Liu SX (2005b) Characterization and source apportionment of atmospheric organic and elemental carbon during fall and winter of 2003 in Xi’an, China. Atmospheric Chemistry and Physics 5(11), 3127-3137.
| Crossref | Google Scholar |

Cao JJ, Lee SC, Chow JC, Watson JG, Ho KF, Zhang RJ, Jin ZD, Shen ZX, Chen GC, Kang YM, Zou SC, Zhang LZ, Qi SH, Dai MH, Cheng Y, Hu K (2007) Spatial and seasonal distributions of carbonaceous aerosols over China. Journal of Geophysical Research 112(D22), D22S11.
| Crossref | Google Scholar |

Castro LM, Pio CA, Harrison RM, Smith DJT (1999) Carbonaceous aerosol in urban and rural European atmospheres: estimation of secondary organic carbon concentrations. Atmospheric Environment 33(17), 2771-2781.
| Crossref | Google Scholar |

Chen C, Zhang H, Li H, Wu N, Zhang Q (2020) Chemical characteristics and source apportionment of ambient PM1.0 and PM2.5 in a polluted city in North China plain. Atmospheric Environment 242, 117867.
| Crossref | Google Scholar |

Cheng Y, He KB, Duan FK, Du ZY, Zheng M, Ma YL (2014) Ambient organic carbon to elemental carbon ratios: influence of the thermal-optical temperature protocol and implications. Science of the Total Environment. 468–469, 1103-1111.
| Crossref | Google Scholar | PubMed |

Chow JC, Watson JG (2002) PM2.5 carbonate concentrations at regionally representative interagency monitoring of protected visual environment sites. Journal of Geophysical Research 107(D21), 8344.
| Crossref | Google Scholar |

Chow JC, Watson JG, Lu Z, Lowenthal DH, Frazier CA, Solomon PA, Thuillier RH, Magliano K (1996) Descriptive analysis of PM2.5 and PM10 at regionally representative locations during SJVAQS/AUSPEX. Atmospheric Environment 30(12), 2079-2112.
| Crossref | Google Scholar |

Chow JC, Watson JG, Kuhns H, Etyemezian V, Lowenthal DH, Crow D, Kohl SD, Engelbrecht JP, Green MC (2004) Source profiles for industrial, mobile, and area sources in the Big Bend Regional Aerosol Visibility and Observational study. Chemosphere 54(2), 185-208.
| Crossref | Google Scholar | PubMed |

Chow JC, Watson JG, Antony Chen LW, Chang MCO, Robinson NF, Trimble D, Kohl S (2007) The IMPROVE_A temperature protocol for thermal/optical carbon analysis: maintaining consistency with a long-term database. Journal of the Air & Waste Management Association 57(9), 1014-1023.
| Crossref | Google Scholar | PubMed |

Chow JC, Watson JG, Lowenthal DH, Antony Chen LW, Motallebi N (2011) PM2.5 source profiles for black and organic carbon emission inventories. Atmospheric Environment 45(31), 5407-5414.
| Crossref | Google Scholar |

Claeys M, Graham B, Vas G, Wang W, Vermeylen R, Pashynska V, Cafmeyer J, Guyon P, Andreae MO, Artaxo P, Maenhaut W (2004) Formation of secondary organic aerosols through photooxidation of isoprene. Science 303(5661), 1173-1176.
| Crossref | Google Scholar | PubMed |

Dan M, Zhuang G, Li X, Tao H, Zhuang Y (2004) The characteristics of carbonaceous species and their sources in PM2.5 in Beijing. Atmospheric Environment 38(21), 3443-3452.
| Crossref | Google Scholar |

Dao X, Ji D, Zhang X, He J, Sun J, Hu J, Liu Y, Wang L, Xu X, Tang G, Wang Y (2022) Significant reduction in atmospheric organic and elemental carbon in PM2.5 in 2 + 26 cities in northern China. Environmental Research 211, 113055.
| Crossref | Google Scholar | PubMed |

Ding J, Huang W, Zhao J, Li L, Xiong G, Jiang C, Ye D, Li D, Wang J, Yu J, Liu R (2022) Characteristics and source origins of carbonaceous aerosol in fine particulate matter in a megacity, Sichuan Basin, southwestern China. Atmospheric Pollution Research 13(1), 101266.
| Crossref | Google Scholar |

Dong D, Qiu T, Du S, Gu Y, Li A, Hua X, Ning Y, Liang D (2023) The chemical characterization and source apportionment of PM2.5 and PM10 in a typical city of northeast China. Urban Climate 47, 101373.
| Crossref | Google Scholar |

Draxler RR, Hess GD (1998) An overview of the HYSPLIT_4 modeling system of trajectories, dispersion, and deposition. Australian Meteorological Magazine 47(4), 295-308.
| Google Scholar |

Duan L, Yu H, Wang Q, Wang F, Lin T, Cao Y, Guo Z (2024) A comprehensive exploration of characteristics and source attribution of carbonaceous aerosols in PM2.5 in an east China megacity. Environmental Pollution 343, 123239.
| Crossref | Google Scholar | PubMed |

Fang D, Wang Q, Li H, Yu Y, Lu Y, Qian X (2016) Mortality effects assessment of ambient PM2.5 pollution in the 74 leading cities of China. Science of the Total Environment 569–570, 1545-1552.
| Crossref | Google Scholar | PubMed |

Gao J, Wang K, Wang Y, Liu S, Zhu C, Hao J, Liu H, Hua S, Tian H (2018) Temporal-spatial characteristics and source apportionment of PM2.5 as well as its associated chemical species in the Beijing–Tianjin–Hebei region of China. Environmental Pollution 233, 714-724.
| Crossref | Google Scholar | PubMed |

Grivas G, Cheristanidis S, Chaloulakou A (2012) Elemental and organic carbon in the urban environment of Athens. Seasonal and diurnal variations and estimates of secondary organic carbon. Science of the Total Environment 414, 535-545.
| Crossref | Google Scholar | PubMed |

Guo L, Cui Y, He Q, Gao W, Pei K, Zhu L, Li H, Wang X (2021) Contributions of aerosol chemical composition and sources to light extinction during haze and non-haze days in Taiyuan, China. Atmospheric Pollution Research 12(8), 101140.
| Crossref | Google Scholar |

Gupta L, Bansal M, Nandi P, Habib G, Sunder Raman R (2023) Source apportionment and potential source regions of size-resolved particulate matter at a heavily polluted industrial city in the Indo-Gangetic Plain. Atmospheric Environment 298, 119614.
| Crossref | Google Scholar |

Han Y, Cao J, Chow JC, Watson JG, An Z, Jin Z, Fung K, Liu S (2007) Evaluation of the thermal/optical reflectance method for discrimination between char- and soot-EC. Chemosphere 69(4), 569-574.
| Crossref | Google Scholar | PubMed |

Han Y, Chen Y, Feng Y, Shang Y, Li J, Li Q, Chen J (2022) Existence and formation pathways of high- and low-maturity elemental carbon from solid fuel combustion by a time-resolved study. Environmental Science & Technology 56(4), 2551-2561.
| Crossref | Google Scholar | PubMed |

He Q, Guo W, Zhang G, Yan Y, Chen L (2015) Characteristics and seasonal variations of carbonaceous species in PM2.5 in Taiyuan, China. Atmosphere 6(6), 850-862.
| Crossref | Google Scholar |

Ho K-F, Lee Y-C, Niu X, Xu H, Zhang R, Cao J-J, Tsai C-Y, Hsiao T-C, Chuang H-C (2022) Organic carbon and acidic ions in PM2.5 contributed to particle bioreactivity in Chinese megacities during haze episodes. Environmental Science and Pollution Research 29(8), 11865-11873.
| Crossref | Google Scholar | PubMed |

Huang Y, Zhang L, Li T, Chen Y, Yang F (2020) Seasonal variation of carbonaceous species of PM2.5 in a small city in Sichuan Basin, China. Atmosphere 11(12), 1286.
| Crossref | Google Scholar |

Jacobson MZ (2001) Strong radiative heating due to the mixing state of black carbon in atmospheric aerosols. Nature 409(6821), 695-697.
| Crossref | Google Scholar | PubMed |

Jain S, Sharma SK, Vijayan N, Mandal TK (2020) Seasonal characteristics of aerosols (PM2.5 and PM10) and their source apportionment using PMF: a four year study over Delhi, India. Environmental Pollution 262, 114337.
| Crossref | Google Scholar | PubMed |

Janssen NA, Gerlofs-Nijland ME, Lanki T, Salonen RO, Cassee F, Hoek G, Fischer P, Brunekreef B and Krzyzanowski M (2012) ‘Health effects of black carbon, World Health Organization.’ (WHO Regional Office for Europe: Copenhagen, Denmark)

Ji D, Zhang J, He J, Wang X, Pang B, Liu Z, Wang L, Wang Y (2016) Characteristics of atmospheric organic and elemental carbon aerosols in urban Beijing, China. Atmospheric Environment 125, 293-306.
| Crossref | Google Scholar |

Ji D, Gao M, Maenhaut W, He J, Wu C, Cheng L, Gao W, Sun Y, Sun J, Xin J, Wang L, Wang Y (2019) The carbonaceous aerosol levels still remain a challenge in the Beijing–Tianjin–Hebei region of China: insights from continuous high temporal resolution measurements in multiple cities. Environment International 126, 171-183.
| Crossref | Google Scholar | PubMed |

Jiang MY, Li JQ, Wu YQ, Lin NT, Wang XM, Fu FF (2011) Chemical characterization of nanometer-sized elemental carbon particles emitted from diesel vehicles. Journal of Aerosol Science 42(6), 365-371.
| Crossref | Google Scholar |

Kaskaoutis DG, Grivas G, Oikonomou K, Tavernaraki P, Papoutsidaki K, Tsagkaraki M, Stavroulas I, Zarmpas P, Paraskevopoulou D, Bougiatioti A, Liakakou E, Gavrouzou M, Dumka UC, Hatzianastassiou N, Sciare J, Gerasopoulos E, Mihalopoulos N (2022) Impacts of severe residential wood burning on atmospheric processing, water-soluble organic aerosol and light absorption, in an inland city of southeastern Europe. Atmospheric Environment 280, 119139.
| Crossref | Google Scholar |

Kim E, Hopke PK (2004) Improving source identification of fine particles in a rural northeastern US area utilizing temperature-resolved carbon fractions. Journal of Geophysical Research 109, D09204.
| Crossref | Google Scholar |

Kim E, Hopke PK, Edgerton ES (2004) Improving source identification of Atlanta aerosol using temperature resolved carbon fractions in positive matrix factorization. Atmospheric Environment 38(20), 3349-3362.
| Crossref | Google Scholar |

Kocak E, Kilavuz SA, Ozturk F, Imamoglu I, Tuncel G (2021) Characterization and source apportionment of carbonaceous aerosols in fine particles at urban and suburban atmospheres of Ankara, Turkey. Environmental Science and Pollution Research 28, 25701-25715.
| Crossref | Google Scholar |

Kong Z, Dong Z, Li Z, Shang L, Li X, Zhang R (2024) Comparisons of carbonaceous aerosols based on hourly data between two typical pollution events in heavily polluted Zhengzhou. Atmospheric Environment 322, 120366.
| Crossref | Google Scholar |

Li B, Zhang J, Zhao Y, Yuan S, Zhao Q, Shen G, Wu H (2015) Seasonal variation of urban carbonaceous aerosols in a typical city Nanjing in Yangtze River Delta, China. Atmospheric Environment 106, 223-231.
| Crossref | Google Scholar |

Li M, Huang X, Zhu L, Li J, Song Y, Cai X, Xie S (2012) Analysis of the transport pathways and potential sources of PM10 in Shanghai based on three methods. Science of the Total Environment 414, 525-534.
| Crossref | Google Scholar | PubMed |

Li W, Zhao X, Guo F, Liu K (2023) Seasonal characteristics of fine particulate carbonaceous species in Taiyuan, north China. Atmosphere 14(3), 593.
| Crossref | Google Scholar |

Li X, Wang L, Ji D, Wen T, Pan Y, Sun Y, Wang Y (2013) Characterization of the size-segregated water-soluble inorganic ions in the Jing-Jin-Ji urban agglomeration: spatial/temporal variability, size distribution and sources. Atmospheric Environment 77, 250-259.
| Crossref | Google Scholar |

Lim H-J, Turpin BJ (2002) Origins of primary and secondary organic aerosol in Atlanta: results of time-resolved measurements during the Atlanta supersite experiment. Environmental Science & Technology 36(21), 4489-4496.
| Crossref | Google Scholar | PubMed |

Lin P, Hu M, Deng Z, Slanina J, Han S, Kondo Y, Takegawa N, Miyazaki Y, Zhao Y, Sugimoto N (2009) Seasonal and diurnal variations of organic carbon in PM2.5 in Beijing and the estimation of secondary organic carbon. Journal of Geophysical Research 114, D00G11.
| Crossref | Google Scholar |

Liu B, Zhang J, Wang L, Liang D, Cheng Y, Wu J, Bi X, Feng Y, Zhang Y, Yang H (2018) Characteristics and sources of the fine carbonaceous aerosols in Haikou, China. Atmospheric Research 199, 103-112.
| Crossref | Google Scholar |

Liu T, Duan F, Ma Y, Ma T, Zhang Q, Xu Y, Li F, Huang T, Kimoto T, Zhang Q, He K (2023) Classification and sources of extremely severe sandstorms mixed with haze pollution in Beijing. Environmental Pollution 322, 121154.
| Crossref | Google Scholar |

Liu X, Peng L, Bai H, Mu L (2015) Characteristics of organic carbon and elemental carbon in the ambient air of coking plant. Aerosol and Air Quality Research 15(4), 1485-1493.
| Crossref | Google Scholar |

Liu X, Wang Z, Bai H, Zhang S, Mu L, Peng L (2020) Characteristics and health risk assessments of heavy metals in PM2.5 in Taiyuan and Yuci college town, China. Air Quality, Atmosphere and Health 13(8), 909-919.
| Crossref | Google Scholar |

Liu X, Li X, Bai H, Mu L, Li Y, Zhang D (2021) Stable carbon isotopic compositions and source apportionment of the carbonaceous components in PM2.5 in Taiyuan, China. Atmospheric Environment 261, 118601.
| Crossref | Google Scholar |

Liu X, Li X, Tan X, Bai H, Li Y, Zhang S (2022) Distribution characteristics, source apportionment, and chemical reactivity of volatile organic compounds in two adjacent areas in Shanxi, north China. Atmospheric Environment 290, 119374.
| Crossref | Google Scholar |

Masalaite A, Remeikis V, Zenker K, Westra I, Meijer HAJ, Dusek U (2020) Seasonal changes of sources and volatility of carbonaceous aerosol at urban, coastal and forest sites in eastern Europe (Lithuania). Atmospheric Environment 225, 117374.
| Crossref | Google Scholar |

Mauderly JL, Chow JC (2008) Health effects of organic aerosols. Inhalation Toxicology 20(3), 257-288.
| Crossref | Google Scholar | PubMed |

Ministry of Ecology and Environment of the People’s Republic of China (2012) 环境空气质量标准 Ambient air quality standards. 标准号: GB 3095–2012代替GB 3095–1996 GB 9137–88. (中华人民共和国生态环境部: Beijing, PR China) Available at https://www.mee.gov.cn/ywgz/fgbz/bz/bzwb/dqhjbh/dqhjzlbz/201203/t20120302_224165.shtml [In Chinese]

Ministry of Ecology and Environment of the People’s Republic of China (2017) 生态环境状况公报 [Bulletin on the State of China’s Ecology and Environment.] (中华人民共和国生态环境部: Beijing, PR China) Available at https://www.mee.gov.cn/hjzl/sthjzk/zghjzkgb/201805/P020180531534645032372.pdf [In Chinese]

Mu L, Tian M, Zheng L, Li X, Jing D (2019) Characterisation and source apportionment of atmospheric organic and elemental carbon in an urban–rural fringe area of Taiyuan, China. Environmental Chemistry 16(3), 187-196.
| Crossref | Google Scholar |

Murillo JH, Rojas Marin JF, Roman SR, Beita Guerrero VH, Arias DS, Ramos AC, Gonzalez BC, Baumgardner DG (2013) Temporal and spatial variations in organic and elemental carbon concentrations in PM10/PM2.5 in the metropolitan area of Costa Rica, Central America. Atmospheric Pollution Research 4(1), 53-63.
| Crossref | Google Scholar |

Na K, Sawant AA, Song C, Cocker DR (2004) Primary and secondary carbonaceous species in the atmosphere of Western Riverside County, California. Atmospheric Environment 38(9), 1345-1355.
| Crossref | Google Scholar |

Norris G, Duvall R, Brown S, Bai S (2014) EPA Positive Matrix Factorization (PMF) 5.0 Fundamentals and User Guide. EPA/600/R-14/108, US Environmental Protection Agency, Office of Research and Development, Washington, DC, USA.

Odum JR, Hoffmann T, Bowman F, Collins D, Flagan RC, Seinfeld JH (1996) Gas/particle partitioning and secondary organic aerosol yields. Environmental Science & Technology 30(8), 2580-2585.
| Crossref | Google Scholar |

Paatero P, Tapper U (1994) Positive matrix factorization: a non-negative factor model with optimal utilization of error estimates of data values. Environmetrics 5, 111-126.
| Crossref | Google Scholar |

Pandis SN, Harley RA, Cass GR, Seinfeld JH (1992) Secondary organic aerosol formation and transport. Atmospheric Environment 26a(13), 2269-2282.
| Crossref | Google Scholar |

Phairuang W, Suwattiga P, Chetiyanukornkul T, Hongtieab S, Limpaseni W, Ikemori F, Hata M, Furuuchi M (2019) The influence of the open burning of agricultural biomass and forest fires in Thailand on the carbonaceous components in size-fractionated particles. Environmental Pollution 247, 238-247.
| Crossref | Google Scholar | PubMed |

Phairuang W, Inerb M, Furuuchi M, Hata M, Tekasakul S, Tekasakul P (2020) Size-fractionated carbonaceous aerosols down to PM0.1 in southern Thailand: local and long-range transport effects. Environmental Pollution 260, 114031.
| Crossref | Google Scholar | PubMed |

Pio C, Cerqueira M, Harrison RM, Nunes T, Mirante F, Alves C, Oliveira C, Sanchez de la Campa A, Artíñano B, Matos M (2011) OC/EC ratio observations in Europe: re-thinking the approach for apportionment between primary and secondary organic carbon. Atmospheric Environment 45(34), 6121-6132.
| Crossref | Google Scholar |

Pui DYH, Chen S-C, Zuo Z (2014) PM2.5 in China: measurements, sources, visibility and health effects, and mitigation. Particuology 13, 1-26.
| Crossref | Google Scholar |

Ramírez O, Sánchez de la Campa AM, de la Rosa J (2018) Characteristics and temporal variations of organic and elemental carbon aerosols in a high-altitude, tropical Latin American megacity. Atmospheric Research 210, 110-122.
| Crossref | Google Scholar |

Safai PD, Raju MP, Rao PSP, Pandithurai G (2014) Characterization of carbonaceous aerosols over the urban tropical location and a new approach to evaluate their climatic importance. Atmospheric Environment 92, 493-500.
| Crossref | Google Scholar |

Sharma SK, Mandal TK, Banoo R, Rai A, Rani M (2022) Long-term variation in carbonaceous components of PM2.5 from 2012 to 2021 in Delhi. Bulletin of Environmental Contamination and Toxicology 109(3), 502-510.
| Crossref | Google Scholar | PubMed |

Shen G, Tao S, Wei S, Chen Y, Zhang Y, Shen H, Huang Y, Zhu D, Yuan C, Wang H, Wang Y, Pei L, Liao Y, Duan Y, Wang B, Wang R, Lv Y, Li W, Wang X, Zheng X (2013) Field measurement of emission factors of PM, EC, OC, parent, nitro-, and oxy- polycyclic aromatic hydrocarbons for residential briquette, coal cake, and wood in rural Shanxi, China. Environmental Science & Technology 47(6), 2998-3005.
| Crossref | Google Scholar | PubMed |

Su J, Zhang R, Liu B, Tong M, Xiao S, Wang X, Zhao Q, Song W, Talifu D, Wang X (2023) Seasonal and day–night variations in carbonaceous aerosols and their light-absorbing properties in Guangzhou, China. Atmosphere 14(10), 1545.
| Crossref | Google Scholar |

Su L, Yuan Z, Fung JC, Lau AK (2015) A comparison of HYSPLIT backward trajectories generated from two GDAS datasets. Science of the Total Environment 506–507, 527-537.
| Crossref | Google Scholar | PubMed |

Suan Tial MK, Kyi NN, Amin M, Hata M, Furuuchi M, Putri RM, Paluang P, Suriyawong P, Phairuang W (2024) Size-fractionated carbonaceous particles and climate effects in the eastern region of Myanmar. Particuology 90, 31-40.
| Crossref | Google Scholar |

Szidat S, Ruff M, Perron N, Wacker L, Synal HA, Hallquist M, Shannigrahi A, Yttri K, Dye C, Simpson D (2009) Fossil and non-fossil sources of organic carbon (OC) and elemental carbon (EC) in Göteborg, Sweden. Atmospheric Chemistry and Physics 9, 1521-1535.
| Crossref | Google Scholar |

Tsiodra I, Grivas G, Tavernaraki K, Bougiatioti A, Apostolaki M, Paraskevopoulou D, Gogou A, Parinos C, Oikonomou K, Tsagkaraki M, Zarmpas P, Nenes A, Mihalopoulos N (2021) Annual exposure to polycyclic aromatic hydrocarbons in urban environments linked to wintertime wood-burning episodes. Atmospheric Chemistry and Physics 21(23), 17865-17883.
| Crossref | Google Scholar |

Turpin BJ, Huntzicker JJ (1995) Identification of secondary organic aerosol episodes and quantitation of primary and secondary organic aerosol concentrations during SCAQS. Atmospheric Environment 29(23), 3527-3544.
| Crossref | Google Scholar |

Viana M, Maenhaut W, ten Brink HM, Chi X, Weijers E, Querol X, Alastuey A, Mikuška P, Večeřa Z (2007) Comparative analysis of organic and elemental carbon concentrations in carbonaceous aerosols in three European cities. Atmospheric Environment 41(28), 5972-5983.
| Crossref | Google Scholar |

Vicente ED, Alves CA (2018) An overview of particulate emissions from residential biomass combustion. Atmospheric Research 199, 159-185.
| Crossref | Google Scholar |

Wang Y, Zhuang G, Tang A, Yuan H, Sun Y, Chen S, Zheng A (2005) The ion chemistry and the source of PM2.5 aerosol in Beijing. Atmospheric Environment 39(21), 3771-3784.
| Crossref | Google Scholar |

Wang G, Xie M, Hu S, Gao S, Tachibana E, Kawamura K (2010) Dicarboxylic acids, metals and isotopic compositions of C and N in atmospheric aerosols from inland China: implications for dust and coal burning emission and secondary aerosol formation. Atmospheric Chemistry and Physics 10(13), 6087-6096.
| Crossref | Google Scholar |

Watson JG, Chow JC, Lowenthal DH, Pritchett LC, Frazier CA, Neuroth GR, Robbins R (1994) Differences in the carbon composition of source profiles for diesel- and gasoline-powered vehicles. Atmospheric Environment 28(15), 2493-2505.
| Crossref | Google Scholar |

Wu C, Yu JZ (2016) Determination of primary combustion source organic carbon-to-elemental carbon (OC / EC) ratio using ambient OC and EC measurements: secondary OC–EC correlation minimization method. Atmospheric Chemistry and Physics 16(8), 5453-5465.
| Crossref | Google Scholar |

Wu C, Ng WM, Huang J, Wu D, Yu JZ (2012) Determination of elemental and organic carbon in PM2.5 in the Pearl River Delta region: inter-instrument (Sunset vs. DRI Model 2001 Thermal/Optical Carbon Analyzer) and inter-protocol comparisons (IMPROVE vs. ACE-Asia Protocol). Aerosol Science and Technology 46(6), 610-621.
| Crossref | Google Scholar |

Yang S, Duan F, Ma Y, He K, Zhu L, Ma T, Ye S, Li H, Huang T, Kimoto T (2019) Haze formation indicator based on observation of critical carbonaceous species in the atmosphere. Environmental Pollution 244, 84-92.
| Crossref | Google Scholar | PubMed |

Yassin MF, Almutairi SK, Al-Hemoud A (2018) Dust storms backward trajectories’ and source identification over Kuwait. Atmospheric Research 212, 158-171.
| Crossref | Google Scholar |

Yu Y, Ding F, Mu Y, Xie M, Wang Q (2020) High time-resolved PM2.5 composition and sources at an urban site in Yangtze River Delta, China after the implementation of the APPCAP. Chemosphere 261, 127746.
| Crossref | Google Scholar |

Zeng L, Offor F, Zhan L, Lyu X, Liang Z, Zhang L, Wang J, Cheng H, Guo H (2019) Comparison of PM2.5 pollution between an African city and an Asian metropolis. Science of the Total Environment 696, 134069.
| Crossref | Google Scholar |

Zhan C, Zhang J, Zheng J, Yao R, Wang P, Liu H, Xiao W, Liu X, Cao J (2017) Characterization of carbonaceous fractions in PM2.5 and PM10 over a typical industrial city in central China. Environmental Science and Pollution Research 26(17), 16855-16867.
| Crossref | Google Scholar | PubMed |

Zhang D, Liu X, Peng L, Bai H, Wang Z, Zhang S, Zhang J (2019) Analysis of characteristics of carbonaceous aerosols in PM2.5 of Taiyuan. Environmental Chemistry 38(12), 2719-2727.
| Google Scholar |

Zhang W, Peng X, Bi X, Cheng Y, Liang D, Wu J, Tian Y, Zhang Y, Feng Y (2021) Source apportionment of PM2.5 using online and offline measurements of chemical components in Tianjin, China. Atmospheric Environment 244, 117942.
| Crossref | Google Scholar |

Zhang X, Ji G, Peng X, Kong L, Zhao X, Ying R, Yin W, Xu T, Cheng J, Wang L (2022) Characteristics of the chemical composition and source apportionment of PM2.5 for a one-year period in Wuhan, China. Journal of Atmospheric Chemistry 79(2), 101-115.
| Crossref | Google Scholar |

Zhang ZY, Wong MS, Lee KH (2015) Estimation of potential source regions of PM2.5 in Beijing using backward trajectories. Atmospheric Pollution Research 6(1), 173-177.
| Google Scholar |

Zhou H, Lü C, He J, Gao M, Zhao B, Ren L, Zhang L, Fan Q, Liu T, He Z, Dudagula , Zhou B, Liu H, Zhang Y (2018) Stoichiometry of water-soluble ions in PM2.5: application in source apportionment for a typical industrial city in semi-arid region, northwest China. Atmospheric Research 204, 149-160.
| Crossref | Google Scholar |

Zhou R, Yan C, Yang Q, Niu H, Liu J, Xue F, Chen B, Zhou T, Chen H, Liu J, Jin Y (2023) Characteristics of wintertime carbonaceous aerosols in two typical cities in Beijing–Tianjin–Hebei region, China: insights from multiyear measurements. Environmental Research 216, 114469.
| Crossref | Google Scholar |