Metal bioaccessibility in size-resolved atmospheric particles: Source and aging impacts
Metal bioaccessibility is critical for health effects. The influence of sources and aging processes on bioaccessibility of metals in size-resolved atmospheric particulate matter (PM) remains unclear. Size-resolved bioaccessibility of metals in source-emitted and atmospheric PM was measured in this s...
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Elsevier
2025-04-01
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| Series: | Environment International |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S016041202500176X |
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| author | Kun Hua Rui Chen Bohan Zhang Yingze Tian Yinchang Feng |
| author_facet | Kun Hua Rui Chen Bohan Zhang Yingze Tian Yinchang Feng |
| author_sort | Kun Hua |
| collection | DOAJ |
| description | Metal bioaccessibility is critical for health effects. The influence of sources and aging processes on bioaccessibility of metals in size-resolved atmospheric particulate matter (PM) remains unclear. Size-resolved bioaccessibility of metals in source-emitted and atmospheric PM was measured in this study. The bioaccessibility of most metals varied greatly with sources, while it remained relatively stable across different sizes for each source. In atmospheric PM, Cu, Mn, Cr, and V showed high bioaccessibility at fine size but low at coarse size especially in floating dust season, indicating effects of combustion sources at fine size and dust sources at coarse size. Atmospheric As and Pb bioaccessibility showed slight size variability and were lower during heating season, linking with enhanced coal combustion with relatively low bioaccessibility. An advanced method was developed to quantify source-specific risk based on size-resolved bioaccessibility. Percentage contributions to cancer risk (CR) of PM10 were the highest for industrial source (IS, 38 %), followed by aged aerosol (AA, 22 %), and coal combustion (CC, 18 %). Contribution of IS was high at sizes < 0.43 µm; and that of CC was high at sizes < 0.43 µm and 1.1–4.7 µm. Additionally, explainable machine learning revealed that atmospheric processes enhanced the Mn bioaccessibility, likely due to highly soluble MnSO4 formed through acid-processing; and increased the Cr bioaccessibility, probably due to increased fractions of hexavalent Cr originating from oxidation processes. |
| format | Article |
| id | doaj-art-e9154297a4cb4575992dc13fa89ef22b |
| institution | DOAJ |
| issn | 0160-4120 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Environment International |
| spelling | doaj-art-e9154297a4cb4575992dc13fa89ef22b2025-08-20T03:13:22ZengElsevierEnvironment International0160-41202025-04-0119810942510.1016/j.envint.2025.109425Metal bioaccessibility in size-resolved atmospheric particles: Source and aging impactsKun Hua0Rui Chen1Bohan Zhang2Yingze Tian3Yinchang Feng4Key Laboratory of Urban Air Particulate Pollution Prevention and Control of Ministry of Ecology and Environment, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China; CMA-NKU Cooperative Laboratory for Atmospheric Environment-Health Research, Tianjin, 300074, ChinaResearch Center of Hubei Small Town Development, Hubei Engineering University, Xiaogan 432000, China; Corresponding authors.Key Laboratory of Urban Air Particulate Pollution Prevention and Control of Ministry of Ecology and Environment, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, ChinaKey Laboratory of Urban Air Particulate Pollution Prevention and Control of Ministry of Ecology and Environment, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China; CMA-NKU Cooperative Laboratory for Atmospheric Environment-Health Research, Tianjin, 300074, China; Corresponding authors.Key Laboratory of Urban Air Particulate Pollution Prevention and Control of Ministry of Ecology and Environment, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China; CMA-NKU Cooperative Laboratory for Atmospheric Environment-Health Research, Tianjin, 300074, ChinaMetal bioaccessibility is critical for health effects. The influence of sources and aging processes on bioaccessibility of metals in size-resolved atmospheric particulate matter (PM) remains unclear. Size-resolved bioaccessibility of metals in source-emitted and atmospheric PM was measured in this study. The bioaccessibility of most metals varied greatly with sources, while it remained relatively stable across different sizes for each source. In atmospheric PM, Cu, Mn, Cr, and V showed high bioaccessibility at fine size but low at coarse size especially in floating dust season, indicating effects of combustion sources at fine size and dust sources at coarse size. Atmospheric As and Pb bioaccessibility showed slight size variability and were lower during heating season, linking with enhanced coal combustion with relatively low bioaccessibility. An advanced method was developed to quantify source-specific risk based on size-resolved bioaccessibility. Percentage contributions to cancer risk (CR) of PM10 were the highest for industrial source (IS, 38 %), followed by aged aerosol (AA, 22 %), and coal combustion (CC, 18 %). Contribution of IS was high at sizes < 0.43 µm; and that of CC was high at sizes < 0.43 µm and 1.1–4.7 µm. Additionally, explainable machine learning revealed that atmospheric processes enhanced the Mn bioaccessibility, likely due to highly soluble MnSO4 formed through acid-processing; and increased the Cr bioaccessibility, probably due to increased fractions of hexavalent Cr originating from oxidation processes.http://www.sciencedirect.com/science/article/pii/S016041202500176XMetalsSize-resolved bioaccessibilitySource apportionmentAtmospheric aging processesSource-specific health risk |
| spellingShingle | Kun Hua Rui Chen Bohan Zhang Yingze Tian Yinchang Feng Metal bioaccessibility in size-resolved atmospheric particles: Source and aging impacts Environment International Metals Size-resolved bioaccessibility Source apportionment Atmospheric aging processes Source-specific health risk |
| title | Metal bioaccessibility in size-resolved atmospheric particles: Source and aging impacts |
| title_full | Metal bioaccessibility in size-resolved atmospheric particles: Source and aging impacts |
| title_fullStr | Metal bioaccessibility in size-resolved atmospheric particles: Source and aging impacts |
| title_full_unstemmed | Metal bioaccessibility in size-resolved atmospheric particles: Source and aging impacts |
| title_short | Metal bioaccessibility in size-resolved atmospheric particles: Source and aging impacts |
| title_sort | metal bioaccessibility in size resolved atmospheric particles source and aging impacts |
| topic | Metals Size-resolved bioaccessibility Source apportionment Atmospheric aging processes Source-specific health risk |
| url | http://www.sciencedirect.com/science/article/pii/S016041202500176X |
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