4.7 Article

Novel High Molecular Weight Synthetic Phenolic Antioxidants in Indoor Dust in Toronto, Canada

期刊

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acs.estlett.9b00715

关键词

-

资金

  1. Natural Sciences and Engineering Research Council of Canada

向作者/读者索取更多资源

Synthetic phenolic antioxidants (SPAs) are additives that are used to retard oxidative degradation in polymers, extending their lifespans. Previous studies have mainly focused on the pollution and toxicity risk of low molecular weight SPAs such as 2,6-di-tert-butyl-4-methylphenol (BHT, C15H24O). In this study, 10 novel high molecular weight SPAS were investigated, along with BHT. Surprisingly, all 10 high molecular weight SPAs, as well as BHT, were detected in indoor dust collected in Toronto, with Sigma SPAs of 239-2.13 X 10(5) ng/g (geometric mean (GM): 1.77 X 10(3) ng/g). Although BHT (GM: 749 ng/g) was the primary congener in the indoor dust,. contributing 55.2% to Sigma SPAs, the 10 newly identified high molecular weight SPAs, such as pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate) (AO1010, C73H108O12, GM: 146 ng/g), octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionate (AO1076, C35H62O3, GM: 76.4 ng/g), and triethylene glycol bis(3-tert-butyl-4-hydroxy-5-methylphenyl)propionate (AO245, C34H50O8, GM: 28.8 ng/g), also contributed substantially to Sigma SPAs (44.8%). The newly identified high molecular weight SPAs were predicted to have intermediate to high toxicity risks by Toxtree. The high molecular weight SPAs are likely hydrolytically stable in indoor environments, as their hydrolysis product was detected seldomly and only at low concentrations. To our knowledge, this is the first study reporting the occurrence of eight high molecular weight SPAS in indoor environments, among which seven congeners were detected for the first time in any environmental samples. Further studies on SPAs should include these newly identified high molecular weight SPAs, particularly AO1010, AO1076, and AO245.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据