Journal of Environmental Health Sciences (한국환경보건학회지)

Korean Society of Environmental Health (한국환경보건학회)
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Calculation of the Theoretical Total Amount Ratio of Di(2-ethyl-hexyl) Phthalate in Indoor Air and Floor Dust in a Test House

모의 실험주택 모니터링 결과를 활용한 실내공기 및 바닥먼지 중 Di(2-ethyl-hexyl) phthalate (DEHP)의 이론적 총량 비율 산출

  • SaHo Chun (Department of Energy and Environmental Engineering, Seoul National University of Science and Technology) ;
  • Khawon Lee (FITI Testing and Research Institute) ;
  • SeungJung Kim (FITI Testing and Research Institute) ;
  • SeungPyo Jung (FITI Testing and Research Institute) ;
  • DaYoung Kang (FITI Testing and Research Institute) ;
  • Ki-Tae Kim (Department of Energy and Environmental Engineering, Seoul National University of Science and Technology)
  • Received : 2023.10.10
  • Accepted : 2023.11.06
  • Published : 2023.12.31
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Abstract

Background: Human exposure to phthalates in indoor environments occurs via dermal absorption, oral ingestion of indoor dust, and inhalation of indoor air. However, systematic studies to investigate the exposure rate to phthalates among the three exposure routes in indoor environments are currently limited. Objectives: A theoretical exposure ratio between inhalation and oral exposure was calculated based on the total amount of di(2-ethyl-hexyl) phthalate (DEHP) emitted into indoor air and deposited into floor dust in a test house. Methods: Flooring and wallpaper containing DEHP were installed in a test house and the concentration of DEHP in both indoor air and floor dust were monitored for five months. Based on the measured DEHP concentrations, the theoretical total amount ratio of DEHP that could be exposed through inhalation and oral ingestion was calculated. Results: Considering the period of operation in the test house, the theoretical total amount of DEHP through inhalation and oral ingestion exposures in the entire test house space was calculated to be 0.014 mg and 5.5 mg, respectively. The exposure ratio of the two routes between inhalation and oral exposure corresponding to the total DEHP amount in flooring and wallpaper was 6.0×10-7% and 2.3×10-4%, indicating that theoretical oral exposure to DEHP is approximately 380 times higher than inhalation. Conclusions: Monitoring results from a test house has shown that oral exposure is the main exposure route for DEHP in indoor environments. The experimental design employed in this study and theoretical exposure ratio obtained can be applied to investigate actual exposure to DEHP and to determine the exposure characteristics of various types of semi-volatile organic compounds.

Keywords

Acknowledgement

이 연구는 환경부의 재원으로 한국환경산업기술원의 생활화학제품 안전관리 기술개발사업(No. 2020002970002)의 지원을 받아 연구되었으며 이에 감사드립니다.

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