对p-phenylenediamine抗氧化剂的异质臭氧氧化
Zhengshen Chen1, Shenghong Wang2, Li Li2
1Department of Environmental Science and Engineering, State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China.
Journal of hazardous materials
|March 14, 2026
概括
常见的抗氧化剂如IPPD,CPPD和DPPD与大气臭氧迅速反应,形成许多转化产物. 许多新发现的PPD产品表现出持久性,生物积累性或有毒性,引发了环境问题.
科学领域:
- 环境化学环境化学
- 大气化学 大气化学
- 化学动力学 化学动力学
背景情况:
- N-(1,3-Dimethylbutyl) -N'-phenyl-p-phenylenediamine-quinone (6PPD-Q) 是一个新出现的污染物.
- 其他广泛使用的PPD (IPPD,CPPD,DPPD) 的大气命运在很大程度上是未知的.
- 了解PPD大气转变对于环境风险评估至关重要.
研究的目的:
- 为了研究与表面结合的IPPD,CPPD和DPPD的异质臭氧氧化.
- 为了确定PPD转化产品的反应动力学,化学机制和危险性质.
- 评估与这些PPD相关的大气命运和环境风险.
主要方法:
- 研究了IPPD,CPPD和DPPD的异质臭氧氧化动力学.
- 使用先进的分析技术识别的转化产品.
- 对已识别的产品进行危险评估 (持久性,生物积累,毒性).
主要成果:
- 对IPPD,CPPD和DPPD的测量异质速率常数表明大气寿命短 (<12.7小时).
- 确定了72种PPD转化产品,其中许多以前没有报告过.
- 发现了49种具有持久性,生物积累性或有毒性 (PBT) 的转化产品.
结论:
- IPPD,CPPD和DPPD与大气中的臭氧高度反应.
- PPDs的大气转化产生了许多潜在的危险化合物.
- 优先考虑PPD转化产品对风险评估至关重要.
相关概念视频
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