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

• 영문명: Calculation of the Theoretical Total Amount Ratio of Di(2-ethyl-hexyl) Phthalate in Indoor Air and Floor Dust in a Test House
• 발행기관: 한국환경보건학회
• 저자명: 천사호 이가원 김승중 정승표 강다영 김기태
• 간행물 정보: 『1. 한국환경보건학회지』제49권 제6호, 324~333쪽, 전체 10쪽
• 주제분류: 공학 > 환경공학
• 파일형태: PDF
• 발행일자: 2023.12.31

국문 초록

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.

키워드

Indoor air floor dust phthalates di 2-ethyl-hexyl phthalate DEHP test house