Characteristic and human exposure risk assessment of per- and polyfluoroalkyl substances: A study based on indoor dust and drinking water in China.
Environ Pollut
; 254(Pt A): 112873, 2019 Nov.
Article
em En
| MEDLINE
| ID: mdl-31369910
ABSTRACT
Per- and polyfluoroalkyl Substances (PFAS) are ubiquitous in the environmental matrix, and their eco-toxicity on wide life and health risks on humans arising concerns. Due to the information gap, current risk assessments of PFAS ignore the indoor exposure pathway such as indoor dust and the different sources of drinking water. We collected and analyzed 168 indoor dust and 27 drinking water samples (including tap water, filtered water and bottled water). The mean concentrations of six typical PFAS measured in indoor dust and drinking water are in the range of 15.13-491.07â¯ngâ¯g-1 and 0.31-4.14â¯ngâ¯L-1, respectively. For drinking water, PFOA and PFOS were the dominant compounds, while PFHxS was the most abundant in indoor dust. Short-chain PFAS concentrations were higher than long-chain PFAS in both drinking water and indoor dust. Higher concentration of PFAS was observed in tap water and filtered water than bottled water. The total daily intake (TDI) of six PFAS are 20.67-52.97â¯ngâ¯kg-1â¯d-1 for infants, children, teenagers, and adults. As to children, teenagers, and adults, perfluorooctanoate (PFOA) is the major compound, accounting for 72.9-74.7% of the total daily intake. And PFOA (38.7%) and perfluorooctane sulfonate (PFOS, 42.2%) are the dominant PFAS for infants. The quantitative proportions of exposure sources are firstly revealed in this study, which in the order of foodstuffâ¯>â¯indoor dustâ¯>â¯drinking waterâ¯>â¯indoor air. Although the contribution to the PFAS intake of drinking water and indoor dust was not predominant (<9%), the health risks caused by long-term exposure need our attention. The hazard quotient (HQ) values of total PFAS were in the range of 0.154-0.498, which suggesting the relatively lower exposure risk in Chinese population. This study provides important reference to understand PFAS exposure status other than foodstuff.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Água Potável
/
Poluição do Ar em Ambientes Fechados
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Poeira
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Exposição Ambiental
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Fluorocarbonos
Tipo de estudo:
Etiology_studies
/
Risk_factors_studies
Limite:
Adolescent
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Adult
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Child
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Humans
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Infant
País/Região como assunto:
Asia
Idioma:
En
Revista:
Environ Pollut
Ano de publicação:
2019
Tipo de documento:
Article