Perfluoroalkyl acids and their precursors in indoor air sampled in children's bedrooms

作者：Kerstin Winkens, Jani Koponen, Jasmin K. Schuster, Mahiba Shoeib, Robin Vestergren, Urs Berger, Anne M. Karvonen, Juha Pekkanen, Hannu Kiviranta, Ian T. Cousins · 发表于：Environmental Pollution · 年份：2016 · DOI：10.1016/j.envpol.2016.12.010 · 被引用次数：111 · 研究领域：Per- and polyfluoroalkyl substances research、Air Quality and Health Impacts、Atmospheric chemistry and aerosols

The contamination levels and patterns of perfluoroalkyl acids (PFAAs) and their precursors in indoor air of children's bedrooms in Finland, Northern Europe, were investigated. Our study is among the most comprehensive indoor air monitoring studies (n = 57) and to our knowledge the first one to analyse air in children's bedrooms for PFASs (17 PFAAs and 9 precursors, including two acrylates, 6:2 FTAC and 6:2 FTMAC). The most frequently detected compound was 8:2 fluorotelomer alcohol (8:2 FTOH) with the highest median concentration (3570 pg/m3). FTOH concentrations were generally similar to previous studies, indicating that in 2014/2015 the impact of the industrial transition had been minor on FTOH levels in indoor air. However, in contrast to earlier studies (with one exception), median concentrations of 6:2 FTOH were higher than 10:2 FTOH. The C8 PFAAs are still the most abundant acids, even though they have now been phased out by major manufacturers. The mean concentrations of FOSE/As, especially MeFOSE (89.9 pg/m3), were at least an order of magnitude lower compared to previous studies. Collectively the comparison of FTOHs, PFAAs and FOSE/FOSAs with previous studies indicates that indoor air levels of PFASs display a time lag to changes in production of several years. This is the first indoor air study investigating 6:2 FTMAC, which was frequently detected (58%) and displayed some of the highest maximum concentrations (13 000 pg/m3). There were several statistically signific...