{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,11]],"date-time":"2026-09-11T05:07:23Z","timestamp":1789103243376,"version":"build-2803163510"},"reference-count":34,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2026,9,9]],"date-time":"2026-09-09T00:00:00Z","timestamp":1788912000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100003654","name":"Korea Environmental Industry & Technology Institute","doi-asserted-by":"crossref","id":[{"id":"10.13039\/501100003654","id-type":"DOI","asserted-by":"crossref"}]},{"id":[{"id":"https:\/\/ror.org\/022r1q746","id-type":"ROR","asserted-by":"publisher"}]},{"DOI":"10.13039\/100015750","name":"Ministry of Climate, Energy and Environment of the Republic of Korea","doi-asserted-by":"publisher","award":["RS-2025-01822969"],"award-info":[{"award-number":["RS-2025-01822969"]}],"id":[{"id":"10.13039\/100015750","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Toxics"],"abstract":"<jats:p>This study conducted age-specific and source-oriented health risk assessments of volatile organic compounds (VOCs) at four measurement sites in Seoul (Gangseo (GS), Gwangjin (GJ), Bukhansan (BHS), and Jongno (JN)). By comparing source-specific concentration contributions with health risk-based contributions, priority sources and compounds were identified. The age-specific health risk assessment showed that, under the central tendency exposure (CTE) scenario, both the total excess cancer risk (TECR) and hazard index (HI) at all measurement sites remained below the recommended guideline values. However, under the reasonable maximum exposure (RME) scenario, TECR exceeded 1 \u00d7 10\u22126 for some adult and elderly groups, indicating the potential for adverse health effects. Compound-specific analysis identified Benzene and Ethylbenzene as the major contributors to TECR, whereas Ethylbenzene, Benzene, and Toluene were the primary contributors to HI. The source-oriented health risk assessment revealed that concentration-based and health risk-based source contributions exhibited different patterns, with manufacturing-related sources ranking among the highest contributors to health risks at all measurement sites. At the GS site, the highest-ranking sources in terms of concentration and health risk contributions were Metal processing product manufacturing and Other product manufacturing, respectively. At the GJ site, Fuel-related emissions ranked highest in concentration contribution, whereas Metal processing products, chemicals and chemical products manufacturing ranked highest in health risk contribution. At the BHS and JN sites, Background hydrocarbons showed the greatest concentration contribution, while Chemicals and chemical products manufacturing, Vehicle exhaust: Acetylene-rich, and Textile product manufacturing were the major contributors. This study demonstrates that VOC management in Seoul should prioritize health risk-based rather than concentration-based approaches.<\/jats:p>","DOI":"10.3390\/toxics14090799","type":"journal-article","created":{"date-parts":[[2026,9,9]],"date-time":"2026-09-09T12:26:11Z","timestamp":1788956771000},"page":"799","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Selection of Priority VOC Emission Sources in Seoul by Comparing Source Contributions and Health Risk-Based Contributions"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0009-0004-8455-3442","authenticated-orcid":false,"given":"Ji-Yun","family":"Jung","sequence":"first","affiliation":[{"name":"Department of Chemical and Environmental Engineering, Seokyeong University, Seoul 02713, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"conceptualization","vocabulary":"credit"},{"role":"methodology","vocabulary":"credit"},{"role":"investigation","vocabulary":"credit"},{"role":"data-curation","vocabulary":"credit"},{"role":"writing-original-draft","vocabulary":"credit"},{"role":"writing-review-editing","vocabulary":"credit"},{"role":"visualization","vocabulary":"credit"},{"role":"resources","vocabulary":"credit"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0977-6898","authenticated-orcid":false,"given":"Shin-Young","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Chemical and Environmental Engineering, Seokyeong University, Seoul 02713, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"investigation","vocabulary":"credit"},{"role":"data-curation","vocabulary":"credit"}]},{"given":"Dong-Seop","family":"Shin","sequence":"additional","affiliation":[{"name":"Department of Chemical and Environmental 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Pollut. Res."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Wang, J., Yue, H., Cui, S., Zhang, Y., Li, H., Wang, J., and Ge, X. (2022). Chemical Characteristics and Source-Specific Health Risks of the Volatile Organic Compounds in Urban Nanjing, China. Toxics, 10.","DOI":"10.3390\/toxics10120722"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"156344","DOI":"10.1016\/j.scitotenv.2022.156344","article-title":"Characteristics of volatile organic compounds in the metropolitan city of Seoul, South Korea: Diurnal variation, source identification, secondary formation of organic aerosol, and health risk","volume":"838","author":"Kim","year":"2022","journal-title":"Sci. Total Environ."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"118749","DOI":"10.1016\/j.envres.2024.118749","article-title":"Ambient volatile organic compounds in the Seoul metropolitan area of South Korea: Chemical reactivity, risks and source apportionment","volume":"251","author":"Eun","year":"2024","journal-title":"Environ. Res."},{"key":"ref_5","unstructured":"Kwon, S.M. (2024). A Study on Source based on Health Risk Assessment of Ambient Volatile Organic Compounds in Seoul. [Doctoral Dissertation, Seokyeong University]."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"135970","DOI":"10.1016\/j.scitotenv.2019.135970","article-title":"Ambient volatile organic compounds (VOCs) in two coastal cities in western Canada: Spatiotemporal variation, source apportionment, and health risk assessment","volume":"706","author":"Xiong","year":"2020","journal-title":"Sci. Total Environ."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"133889","DOI":"10.1016\/j.scitotenv.2019.133889","article-title":"Ambient volatile organic compounds in a suburban site between Beijing and Tianjin: Concentration levels, source apportionment and health risk assessment","volume":"695","author":"Yang","year":"2019","journal-title":"Sci. Total Environ."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"135505","DOI":"10.1016\/j.scitotenv.2019.135505","article-title":"Compositions, sources and health risks of ambient volatile organic compounds (VOCs) at a petrochemical industrial park along the Yangtze River","volume":"703","author":"Zheng","year":"2020","journal-title":"Sci. Total Environ."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"119526","DOI":"10.1016\/j.atmosenv.2022.119526","article-title":"Source-specific health risk analysis on atmospheric hazardous volatile organic compounds (HVOCs) in Nanjing, East China","volume":"294","author":"Lin","year":"2023","journal-title":"Atmos. Environ."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"12077","DOI":"10.1021\/acs.est.2c02558","article-title":"Health Risk-Oriented Source Apportionment of Hazardous Volatile Organic Compounds in Eight Canadian Cities and Implications for Prioritizing Mitigation Strategies","volume":"56","author":"Xiong","year":"2022","journal-title":"Environ. Sci. Technol."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"106148","DOI":"10.1016\/j.scs.2025.106148","article-title":"Intra-urban comparison of hazardous VOCs in Hong Kong: Source apportionment and integrated risk assessment","volume":"120","author":"Cao","year":"2025","journal-title":"Sustain. Cities Soc."},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Jiang, J., Li, B., Wang, B., Lu, L., Meng, F., Tian, C., Qi, H., and Lian, A.L. (2026). Environmental and Health Risk Assessments of Volatile Organic Compounds (VOCs) Based on Source Apportionment-A Case Study in Harbin, a Megacity in Northeastern China. Toxics, 14.","DOI":"10.3390\/toxics14010046"},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Jung, J.Y., Park, S.Y., Sim, Y.J., Yoon, J.C., Lim, H.M., Kim, K.R., Oh, S.R., Choi, Y.S., and Lee, C.M. (2026). Spatial and Temporal Distribution Characteristics of VOCs in Seoul Ambient Air and Identification of Potential Pollution Sources Using Principal Component Analysis. Toxics, 14.","DOI":"10.3390\/toxics14070554"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"12861","DOI":"10.5194\/acp-24-12861-2024","article-title":"Review of source analyses of ambient volatile organic compounds considering reactive losses: Methods of reducing loss effects, impacts of losses, and sources","volume":"24","author":"Liu","year":"2024","journal-title":"Atmos. Chem. Phys."},{"key":"ref_15","unstructured":"United States Environmental Protection Agency (US EPA) (1989). Risk Assessment Guidance for Superfund Volume I Human Health Evaluation Manual (Part A), United States Environmental Protection Agency."},{"key":"ref_16","unstructured":"United States Environmental Protection Agency (US EPA) (2026, May 06). Regional Screening Levels (RSLs)\u2014Generic Tables, Available online: https:\/\/www.epa.gov\/risk\/regional-screening-levels-rsls-generic-tables."},{"key":"ref_17","unstructured":"National Institute of Environmental Research (NIER) (2019). Korean Exposure Factors Handbook, Ministry of Environment."},{"key":"ref_18","unstructured":"National Institute of Environmental Research (NIER) (2019). Korean Exposure Factors Handbook for Children, Ministry of Environment."},{"key":"ref_19","unstructured":"Korean Statistical Information Service (KOSIS) (2026, March 31). Simple Life Table (by 5 Years Old). Available online: https:\/\/kosis.kr\/statHtml\/statHtml.do?sso=ok&returnurl=https%3A%2F%2Fkosis.kr%3A443%2FstatHtml%2FstatHtml.do%3Fconn_path%3D%26tblId%3DDT_1B42%26orgId%3D101%26."},{"key":"ref_20","unstructured":"United States Environmental Protection Agency (US EPA) (2003). Framework for Cumulative Risk Assessment, United States Environmental Protection Agency."},{"key":"ref_21","unstructured":"National Institute of Environmental Research (NIER) (2026, May 07). Regulations Concerning Specific Methods, Etc. for Chemical Risk Assessment. Available online: https:\/\/www.law.go.kr\/%ED%96%89%EC%A0%95%EA%B7%9C%EC%B9%99\/%ED%99%94%ED%95%99%EB%AC%BC%EC%A7%88%EC%9C%84%ED%95%B4%EC%84%B1%ED%8F%89%EA%B0%80%EC%9D%98%EA%B5%AC%EC%B2%B4%EC%A0%81%EB%B0%A9%EB%B2%95%EB%93%B1%EC%97%90%EA%B4%80%ED%95%9C%EA%B7%9C%EC%A0%95."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"21649","DOI":"10.1038\/s41598-020-78756-7","article-title":"Increased long-term health risks attributable to select volatile organic compounds in residential indoor air in southeast Louisiana","volume":"10","author":"Wickliffe","year":"2020","journal-title":"Sci. Rep."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"230028","DOI":"10.4209\/aaqr.230028","article-title":"Health Risk Assessment of Volatile Organic Compounds for Children in Indoor Air, Ulaanbaatar, Mongolia","volume":"23","author":"Otgonbyamba","year":"2023","journal-title":"Aerosol Air Qual. Res."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"118959","DOI":"10.1016\/j.envres.2024.118959","article-title":"Exposure and health risk assessment of volatile organic compounds among drivers and passengers in long-distance buses","volume":"252","author":"Chen","year":"2024","journal-title":"Environ. Res."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"e20294","DOI":"10.1016\/j.heliyon.2023.e20294","article-title":"Health risk assessment of BTEX compounds (benzene, toluene, ethylbenzene and xylene) in different indoor air using Monte Carlo simulation in Zahedan city, Iran","volume":"9","author":"Kamani","year":"2023","journal-title":"Heliyon"},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Ghobakhloo, S., Khoshakhlagh, A.H., Morais, S., and Tehrani, A.M. (2023). Exposure to Volatile Organic Compounds in Paint Production Plants: Levels and Potential Human Health Risks. Toxics, 11.","DOI":"10.3390\/toxics11020111"},{"key":"ref_27","doi-asserted-by":"crossref","unstructured":"Mihankhah, T., Su, Y., Zhang, T., Wang, J., Gilmore, J., Noble, M., Munoz, A., Charron, C., and Xu, X. (2024). Health Risk Assessment of Ambient Volatile Organic Compounds in a Border City in Canada. Atmosphere, 15.","DOI":"10.3390\/atmos15091038"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"384","DOI":"10.5668\/JEHS.2021.47.5.384","article-title":"Health Risk Assessment with Source Apportionment of Ambient Volatile Organic Compounds in Seoul by Positive Matrix Factorization","volume":"47","author":"Kwon","year":"2021","journal-title":"J. Environ. Health Sci."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"153345","DOI":"10.1016\/j.scitotenv.2022.153345","article-title":"An integrated strategy by using long-term monitoring data to identify volatile organic compounds of high concern near petrochemical industrial parks","volume":"821","author":"Hsu","year":"2022","journal-title":"Sci. Total Environ."},{"key":"ref_30","unstructured":"United States Environmental Protection Agency (US EPA) (2014). EPA Positive Matrix Factorization (PMF) 5.0 Fundamentals and User Guide, United States Environmental Protection Agency."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"237","DOI":"10.1080\/10962247.2016.1140693","article-title":"Review of receptor modeling methods for source apportionment","volume":"66","author":"Hopke","year":"2016","journal-title":"J. Air Waste Manag. Assoc."},{"key":"ref_32","first-page":"10053","article-title":"Evaluation of receptor and chemical transport models for PM10 source apportionment","volume":"5","author":"Belis","year":"2023","journal-title":"Atmos. Environ. X"},{"key":"ref_33","unstructured":"National Institute of Environmental Research (NIER) (2026, August 17). Air Pollution Standard Test Methods; Ozone Preoursor-Determination of Ozone Precursor in Ambient Air by On-line GC (ES 01805.1). Available online: https:\/\/www.law.go.kr\/LSW\/\/admRulLsInfoP.do?admRulId=58424&efYd=0."},{"key":"ref_34","unstructured":"Ministry of Environment (MoE) (2024). Guideline for the Installation and Operation of Air Quality Monitoring Networks, Ministry of Environment (MoE). Available online: https:\/\/www.airkorea.or.kr\/web\/board\/3\/1051\/?pMENU_NO=145&page=1."}],"container-title":["Toxics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2305-6304\/14\/9\/799\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,9,11]],"date-time":"2026-09-11T04:29:32Z","timestamp":1789100972000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2305-6304\/14\/9\/799"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,9,9]]},"references-count":34,"journal-issue":{"issue":"9","published-online":{"date-parts":[[2026,9]]}},"alternative-id":["toxics14090799"],"URL":"https:\/\/doi.org\/10.3390\/toxics14090799","relation":{},"ISSN":["2305-6304"],"issn-type":[{"value":"2305-6304","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,9,9]]}}}