Identification of Unusual Antioxidants in the Natural and Built Environments,Environmental Science & Technology Letters

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Identification of Unusual Antioxidants in the Natural and Built Environments
Environmental Science & Technology Letters ( IF 8.9 ) Pub Date : 2019-07-19 , DOI: 10.1021/acs.estlett.9b00415
Yan Wu ₁ , Marta Venier ₁ , Ronald A. Hites ₁

Affiliation

Hindered phenolic antioxidants are common industrial chemicals that are added to polymers of all sorts and even to food. For example, on the order of 10⁷ kg of 2,6-di-tert-butyl-4-methylphenol (also known as BHT) is used in the United States every year. Despite their widespread use, the environmental fates of most of these compounds have not been well-investigated. The first step in such an investigation is the identification of those antioxidants that are present in environmental sources. This paper reports on the identification of two previously unsuspected antioxidants, Irganox 1076 and Irganox 1135. The latter is particularly abundant in a set of children’s car seats we have previously investigated for flame retardants. We also demonstrate that both of these compounds degrade to 2,6-di-tert-butyl-p-benzoquinone and that this compound is very abundant in atmospheric particles collected in Chicago. We suggest that this benzoquinone is likely to be environmentally significant and deserves further attention.

中文翻译：

在自然和建筑环境中识别异常的抗氧化剂

受阻酚类抗氧化剂是常见的工业化学品，已添加到各种聚合物甚至食品中。例如，大约10 ⁷ kg的2,6-叔丁基每年在美国使用4-甲基丁基苯酚（也称为BHT）。尽管已广泛使用这些化合物，但大多数化合物的环境命运尚未得到充分研究。这项研究的第一步是鉴定环境中存在的那些抗氧化剂。本文报道了两种先前未被怀疑的抗氧化剂，Irganox 1076和Irganox 1135的鉴定。后者在我们先前研究过的阻燃剂儿童汽车座椅中特别丰富。我们还表明，这两种化合物的降解为2,6-二-叔丁基- p-苯醌，并且该化合物在芝加哥收集的大气颗粒中非常丰富。我们建议这种苯醌可能对环境具有重要意义，值得进一步关注。

更新日期：2019-07-19

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