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Isopropylated and tert-butylated triarylphosphate isomers in house dust from South China and Midwestern United States
School of Environment, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou, China.
School of Environment, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou, China.
School of Environment, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou, China.
School of Environment, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou, China.
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2019 (English)In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 686, p. 1113-1119Article in journal (Refereed) Published
Abstract [en]

In the present study we determined the concentrations and compositions of a suite of isopropylated and tert-butylated triarylphosphate ester (ITP and TBPP) isomers in house dust from the city of Guangzhou located in South China and the city of Carbondale in Midwestern United States. These two groups of organophosphate esters (OPE) are structurally analogous to triphenyl phosphate (TPHP), but have rarely been investigated for environmental occurrences and human exposure risks. The majority of target ITP and TBPP isomers were 100% detected in house dust from the two locations. Median concentrations of Sigma ITPs (including all ITP isomers) and Sigma TBPPs (including all TBPP isomers) were 63.4 ng/g (range: 16.0-500 ng/g) and 35.4 ng/g (8.1-198 ng/g) in South China house dust, respectively, compared with 476 ng/g (140-1610 ng/g) for Sigma ITPs and 81.3 ng/g (352-800 ng/g) for Sigma TBPPs in Midwestern US. dust. The profiles of ITP or TBPP isomers were similar between the two locations and were dominated by 2-isopropylphenyl diphenyl phosphate (2IPPDPP) and 4-tertbutylphenyl diphenyl phosphate (4tBPDPP), respectively. Although the levels of Sigma ITPs and Sigma TBPPs were generally one order of magnitude lower than those of TPHP in the same dust samples, the broad occurrences of most of these isomers in house dust from the two locations likely suggest their wide applications in household consumer products. Estimated intakes of Sigma ITPs and Sigma ITBPPs via dust ingestion were generally three orders of magnitude lower than the reference dose proposed for TPHP. However, these emerging OPE chemicals merit continuous environmental surveillance, given their possible applications as specific commercial mixtures or as components/impurities in other flame retardant/plasticizer mixtures. (C) 2019 Published by Elsevier B.V.

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 686, p. 1113-1119
Keywords [en]
Isopropylated triarylphosphate esters, tert-butylated triarylphosphate esters, Organophosphate esters, House dust, Daily intake
National Category
Environmental Sciences
Identifiers
URN: urn:nbn:se:oru:diva-75944DOI: 10.1016/j.scitotenv.2019.06.055ISI: 000479029700100PubMedID: 31412507Scopus ID: 2-s2.0-85067026936OAI: oai:DiVA.org:oru-75944DiVA, id: diva2:1347111
Note

Funding Agencies:

Guangdong Innovative and Entrepreneurial Research Team Program  2016ZT06N258 

National Natural Science Foundation of China  21777059 

China Postdoctoral Science Foundation  2018M633281 

Available from: 2019-08-30 Created: 2019-08-30 Last updated: 2019-08-30Bibliographically approved

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Fiedler, Heidelore

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