어린이가 생활하는 실내공간의 바닥먼지 중 프탈레이트 농도와 노출수준: DEHP를 중심으로

Abstract

Background: Few studies have evaluated the exposure to phthalates via inhalation of floor dust in children’s living areas.

Objectives: This study evaluated the concentration and exposure level of phthalates emitted from indoor floor dust in children’s living areas.

Methods: This study utilized the results of a survey conducted by the Ministry of Environment in 2019. Indoor dust was collected from 150 households with children aged 3~7 and 67 daycare centers or local children's centers by using vacuum cleaners. It was analyzed by gas chromatography mass spectrometry. Six types of phthalates were analyzed: Bis (2-ethylhexyl) phthalate (DEHP), Dibutyl phthalate (DBP), Benzyl butyl phthalate (BBP), Di-N-octyl phthalate (DNOP), Diisononyl phthalate (DINP), Di -isodecyl phthalate (DIDP). Results: The medians of DEHP concentrations were 1,028 and 1,937 mg/kg in homes and daycare centers, respectively. The median and maximum values of daily intake were calculated by applying the median and 95th percentile values (the upper 5% of the total concentration) in dust measured in the homes. The DEHP median value was 1.6 µg/kg/bw/day, and a maximum A value of 7.8 µg/kg/bw/day was calculated. When the childcare center values were applied, the median daily intake of DEHP was 3.1 µg/kg/bw/day and the maximum value was 29.2 µg/kg/bw/day. As a result of calculating the daily intake by integrating the values of home and childcare facilities, the median and maximum values of daily intake were 1.9 and 10.9 µg/kg/bw/day, respectively.

Conclusions: This study derives phthalate concentrations among the floor dust in homes and childcare facilities where children mainly spend time, and suggests their intake of phthalates through this. In particular, it was newly suggested that the phthalate concentrations in homes and childcare facilities are different, resulting in differences in intake.