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Occurrence of Substituted p-Phenylenediamine Antioxidants in Dusts
Environmental Science & Technology Letters ( IF 8.9 ) Pub Date : 2021-04-06 , DOI: 10.1021/acs.estlett.1c00148
Wei Huang 1 , Yumeng Shi 1 , Jialing Huang 1 , Chengliang Deng 1 , Shuqin Tang 1 , Xiaotu Liu 1 , Da Chen 1
Affiliation  

The substituted p-phenylenediamines (PPDs) represent a suite of effective antioxidants broadly applied in rubber industries. However, knowledge of their environmental occurrences and fate remains extremely limited. Herein, we explored the occurrence of six major PPD antioxidants and one newly defined transformation product in dust particles from different environments, including roads, underground parking lots, vehicles, and houses. The majority of the PPDs exhibited ubiquitous occurrence in these environments. Median concentrations of total PPDs were determined to be 226 ng/g in road dust, 232 ng/g in parking lot dust, and 156 ng/g in vehicle dust, orders of magnitude greater than those in house dust (14.0 ng/g). Different composition profiles of PPDs were also found between house dust and vehicle-related dust, likely indicating the influence of vehicle tires or other rubber products. In addition, a major ozonation product of N-(1,3-dimethylbutyl)-N′-phenyl-1,4-phenylenediamine (6PPD), 6PPD-qunione, was also identified in dust with levels (median range of 32.2–80.9 ng/g) comparable to that of 6PPD except in house dust. To the best of our knowledge, this is the first systematic investigation of the occurrence of major PPD antioxidants and 6PPD-qunione in various dust matrices. Our findings would attract attention to their environmental fate and ecological and human health risks.

中文翻译:

粉尘中取代苯二胺抗氧化剂的存在

取代的p-苯二胺(PPD)代表了一套有效的抗氧化剂,广泛应用于橡胶工业。但是,关于它们的环境发生和命运的知识仍然极为有限。在本文中,我们探讨了六种主要的PPD抗氧化剂和一种新定义的转化产物在不同环境(包括道路,地下停车场,车辆和房屋)中的尘埃颗粒中的存在。在这些环境中,大多数PPD都普遍存在。经测定,PPD的总中位数浓度为道路扬尘为226 ng / g,停车场扬尘为232 ng / g,车辆扬尘为156 ng / g,比房屋扬尘(14.0 ng / g)高出几个数量级。 。在室内灰尘和车辆相关灰尘之间还发现了PPD的不同组成特征,可能表明汽车轮胎或其他橡胶产品的影响。此外,一种主要的臭氧化产品灰尘中的N-(1,3-二甲基丁基)-N'-苯基-1,4-苯二胺(6PPD),6PPD-奎尼酮也被确定为与灰尘中的水平相当(中值范围为32.2-80.9 ng / g)。 6PPD,但室内灰尘除外。据我们所知,这是首次对各种粉尘基质中主要的PPD抗氧化剂和6PPD-醌的存在进行系统的研究。我们的发现将引起人们对它们的环境命运以及生态和人类健康风险的关注。
更新日期:2021-05-11
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