Single-Use Face Masks as a Potential Source of Synthetic Antioxidants to the Environment,Environmental Science & Technology Letters

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Single-Use Face Masks as a Potential Source of Synthetic Antioxidants to the Environment
Environmental Science & Technology Letters ( IF 8.9 ) Pub Date : 2021-06-30 , DOI: 10.1021/acs.estlett.1c00422
Runzeng Liu ₁ , Scott A. Mabury ₁

Affiliation

Single-use face masks are a powerful tool for reducing the spread of COVID-19. The usage of single-use face masks has increased enormously since the start of the COVID-19 pandemic, and pollution from the huge volume of discarded single-use face masks may become an environmental issue. This study focuses on synthetic antioxidants (AOs), including synthetic phenolic antioxidants (SPAs) and organophosphite antioxidants (OPAs), used in single-use three-layer face masks. Both SPAs and OPAs were detected in single-use face masks, with total concentrations ranging from 20.0 to 575 μg/g (median of 175 μg/g). The dominant congeners detected in the face masks were tris(2,4-di-tert-butylphenyl) phosphite (AO168, median of 83.2 μg/g), tris(2,4-di-tert-butylphenyl) phosphate (AO168O, median of 72.9 μg/g), and pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] (AO1010, median of 13.7 μg/g). No significant concentration difference was observed between medical and nonmedical face masks. Among the three different layers of the face masks, the middle layers showed the highest AO concentrations. On the basis of the median concentrations detected, we estimate that 1084 tons of AOs is used in face masks annually, suggesting that discarded face masks may be a source of AOs to the environment. This is the first study to report the occurrence of a wide range of AOs in face masks.

中文翻译：

一次性口罩是环境合成抗氧化剂的潜在来源

一次性口罩是减少 COVID-19 传播的有力工具。自 COVID-19 大流行开始以来，一次性口罩的使用量大幅增加，大量丢弃的一次性口罩造成的污染可能成为一个环境问题。本研究侧重于合成抗氧化剂 (AO)，包括用于一次性三层口罩的合成酚类抗氧化剂 (SPA) 和有机亚磷酸酯抗氧化剂 (OPA)。在一次性口罩中均检测到 SPA 和 OPA，总浓度范围为 20.0 至 575 微克/克（中位数为 175 微克/克）。在面罩检测到的主要同源物是三（2,4-二-叔丁基苯基）亚磷酸酯（83.2微克/克AO168，中位数），三（2,4-二-叔-丁基苯基）磷酸酯（AO168O，中值为 72.9 μg/g）和季戊四醇四[3-(3,5-二叔丁基-4-羟基苯基)丙酸酯]（AO1010，中值为 13.7 μg/g）。医用和非医用口罩之间没有观察到显着的浓度差异。在口罩的三个不同层中，中间层显示出最高的 AO 浓度。根据检测到的中值浓度，我们估计每年有 1084 吨 AO 用于口罩，这表明丢弃的口罩可能是环境中 AO 的一个来源。这是第一项报告口罩中出现多种 AO 的研究。

更新日期：2021-08-10

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