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Relative Contribution of Metal Content and Soil Particle Mass to Health Risk of Chromium-Contaminated Soil

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  • Shuting Huang

    (Guangdong Industrial Contaminated Site Remediation Technology and Equipment Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China)

  • Fei Huang

    (Guangdong Industrial Contaminated Site Remediation Technology and Equipment Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China)

  • Xiaojun Yang

    (Department of Geography, Florida State University, Tallahassee, FL 32306, USA)

  • Rongbo Xiao

    (Guangdong Industrial Contaminated Site Remediation Technology and Equipment Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China)

  • Yunze Wang

    (Guangzhou Nanyang International School, Guangzhou 510000, China)

  • Meili Xu

    (Guangdong Industrial Contaminated Site Remediation Technology and Equipment Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China)

  • Yuxuan Huang

    (Guangdong Industrial Contaminated Site Remediation Technology and Equipment Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China)

  • Hangyuan Shi

    (Guangdong Industrial Contaminated Site Remediation Technology and Equipment Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China)

  • Peng Wang

    (Guangdong Industrial Contaminated Site Remediation Technology and Equipment Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China)

Abstract

Three soil samples from a chromium (Cr)-contaminated field were classified into five particle fractions (i.e., 0–50 μm, 50–100 μm, 100–250 μm, 250–500 μm, and 500–1000 μm) and were further characterized to study their physicochemical properties and Cr bioaccessibility. The results indicated that the gastrointestinal bioaccessibility estimated by the Solubility Bioaccessibility Research Consortium (SBRC) method was on average 15.9% higher than that by the physiologically based extraction test (PBET) method. The health risk of all samples was within the safe range, and the health risk based on total Cr content may be overestimated by an average of 13.2 times compared to the bioaccessibility-based health risk. The health risk investigated from metal content was mainly contributed by the 50–250 μm fraction, which was 47.5, 50.2, and 43.5% for low-, medium-, and high-level polluted soils, respectively. As for the combined effect, the fractions of 100–250 μm and 500–1000 μm contributed the highest proportion to health risk, which was 57.1, 62.1, and 64.4% for low-level, medium-level, and high-level polluted soils, respectively. These results may further deepen the understanding of health risk assessment and quantify the contribution of the soil particle mass to health risk.

Suggested Citation

  • Shuting Huang & Fei Huang & Xiaojun Yang & Rongbo Xiao & Yunze Wang & Meili Xu & Yuxuan Huang & Hangyuan Shi & Peng Wang, 2022. "Relative Contribution of Metal Content and Soil Particle Mass to Health Risk of Chromium-Contaminated Soil," IJERPH, MDPI, vol. 19(9), pages 1-13, April.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:9:p:5253-:d:802308
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    References listed on IDEAS

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    1. Maiko Ikegami & Minoru Yoneda & Takashi Tsuji & Osamu Bannai & Shinsuke Morisawa, 2014. "Effect of Particle Size on Risk Assessment of Direct Soil Ingestion and Metals Adhered to Children's Hands at Playgrounds," Risk Analysis, John Wiley & Sons, vol. 34(9), pages 1677-1687, September.
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