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Spatial distributions of PM10-bound metal elements in the central part of western Taiwan and their potential emission sources and the carcinogenic health risks

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Abstract

This study aimed to investigate the spatial distribution of metal elements in PM10 and their potential sources and associated health risks over a period of two years in eight locations in the central part of western Taiwan. The study revealed that the mass concentration of PM10 and the total mass concentration of 20 metal elements in PM10 were 39.0 μg m−3 and 4.74 μg m−3, respectively, with total metal elements accounting for approximately 13.0% of PM10. Of the total metal elements, 95.6% were crustal elements (Al, Ca, Fe, K, Mg, and Na), with trace elements (As, Ba, Cd, Cr, Co, Cu, Ga, Mn, Ni, Pb, Sb, Se, V, and Zn) contributing only 4.4%. Spatially, the inland areas exhibited higher PM10 concentrations due to lee-side topography and low wind speeds. In contrast, the coastal regions exhibited higher total metal concentrations because of the dominance of crustal elements from sea salt and crustal soil. Four primary sources of metal elements in PM10 were identified as sea salt (58%), re-suspended dust (32%), vehicle emissions and waste incineration (8%), and industrial emissions and power plants (2%). The positive matrix factorization (PMF) analysis results indicated that natural sources like sea salt and road dust contributed up to 90% of the total metal elements in PM10, while only 10% was attributed to human activities. The excess cancer risks (ECRs) associated with As, Co, and Cr(VI) were greater than 1 × 10−6, and the total ECR was 6.42 × 10−5. Although only 10% of total metal elements in PM10 came from human activities, they contributed to 82% of the total ECR.

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Funding

This research is financially supported by the Formosa Plastics Group under Contract No. 1144878-00 and 1148920-00.

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Authors and Affiliations

  1. Department of Safety, Health and Environmental Engineering, Ming Chi University of Technology, Taishan, New Taipei, 243089, Taiwan

    Yu-Hsiang Cheng, Meng-Ying Jian, Kuan-Ting Liu & Chin-Yu Hsu

  2. Center for Environmental Sustainability and Human Health, Ming Chi University of Technology, Taishan, New Taipei, 243089, Taiwan

    Yu-Hsiang Cheng, Atar Singh Pipal & Chin-Yu Hsu

  3. Chronic Diseases and Health Promotion Research Center, Chang Gung University of Science and Technology, Puzi, Chiayi, 613016, Taiwan

    Yu-Hsiang Cheng

  4. Indian Institute of Tropical Meteorology, Pashan, Pune, 411008, India

    Atar Singh Pipal

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Yu-Hsiang Cheng: supervision, conceptualization, writing, revision; Meng-Ying Jian: statistical analysis, data curation; Kuan-Ting Liu: data curation; Atar Singh Pipal: writing; Chin-Yu Hsu: methodology, revision.

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Cheng, H., Jian, MY., Liu, KT. et al. Spatial distributions of PM10-bound metal elements in the central part of western Taiwan and their potential emission sources and the carcinogenic health risks. Environ Sci Pollut Res 30, 88495–88507 (2023). https://doi.org/10.1007/s11356-023-28675-7

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