Cancer and non-cancer risk associated with PM10-bound metals in subways

Debananda Roy, Suk Hyeon Ahn, Tae Kwon Lee, Yong Chil Seo, Joonhong Park

Research output: Contribution to journalArticlepeer-review

Abstract

Non-cancer and cancer health risks to humans associated with respirable particulate matter ≤10 µm (PM10) in an indoor microenvironment such as a subway cabin are currently a public concern. In this study, detailed investigations of human health risks due to PM10-bound metals in a subway cabin were conducted for the first time. Cancer risks (CRs) were estimated for inhalation exposure (CRinh) using a Monte Carlo probability density function and were compared with incremental lifetime CRs (ILCRs). Moreover, the percentage contributions of each metal to the risk levels were calculated to identify the elements potentially responsible for human health risks. The significant (>1) for non-CRs levels as HI (hazard index) was estimated for children and adults for all types of exposure (inhalation, ingestion, and dermal). Pb, Cr, and Ni were recognized as the foremost contributors to the HQ (hazard quotient) levels for all types of exposure. For subway commuters, the CRinh and ILCR levels for adults were marginally higher than the satisfactory maximum point of confinement of the lifetime carcinogenic risk level (1 × 10−5) where as CRinh for children was within the acceptable limit (1 × 10−6–1 × 10−5). Cr was identified as the predominant carcinogenic element, with 91% contribution to the total CR level in the subway cabin on the Seoul Metropolitan Subway.

Original languageEnglish
Article number102618
JournalTransportation Research Part D: Transport and Environment
Volume89
DOIs
Publication statusPublished - 2020 Dec

Bibliographical note

Funding Information:
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (No. 2018R1A6A1A08025348).The authors are grateful to Duckshin Park (Eco-Transport Research Division, Korea Railroad Research Institute, Republic of Korea) and Kiyoung Lee (Department of Environmental Health and the Institute of Health and Environment, Graduate School of Public Health, Seoul National University, 1 Gwanak-ro. Gwanak-gu Seoul 151-742, Republic of Korea) for their valuable contributions of some of the air pollution data used in this research.

Funding Information:
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (No. 2018R1A6A1A08025348).The authors are grateful to Duckshin Park (Eco-Transport Research Division, Korea Railroad Research Institute, Republic of Korea) and Kiyoung Lee (Department of Environmental Health and the Institute of Health and Environment, Graduate School of Public Health, Seoul National University, 1 Gwanak-ro. Gwanak-gu Seoul 151-742, Republic of Korea) for their valuable contributions of some of the air pollution data used in this research.

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Transportation
  • Environmental Science(all)

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