College of Resources and Environment, Northeast Agriculture University, Harbin 150030, China; CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
College of Resources and Environment, Northeast Agriculture University, Harbin 150030, China.
Sci Total Environ. 2024 Apr 20;922:171393. doi: 10.1016/j.scitotenv.2024.171393. Epub 2024 Feb 29.
N,N'-substituted p-phenylenediamines (PPDs) are widely used antioxidants in rubber tires, which could be released and accumulated in road dusts with rubber tires wear. As ozonation product of N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine (6PPD), 6PPD-quinone (6PPD-Q) exhibited higher toxicity to coho salmon. However, studies on their environmental behaviors are still limited. Road dust is the major medium PPDs exist, which significantly affects the levels of PPDs in other mediums, especially surface water and particulate matter. In this study, road dust samples were collected in 55 major cities of China to explore the distribution characteristics of PPDs and 6PPD-Q. The concentrations of total PPDs (ΣPPDs) and 6PPD-Q in urban trunk road dust samples were in the ranges of 7.90-727 and 3.00-349 ng/g, with median concentrations of 68 and 49 ng/g, respectively. 6PPD and 6PPD-Q are the dominant components in most road dusts. The functional region-dependent pollution characteristics of PPDs and 6PPD-Q give the first finding that urban tunnel road was the highly polluted region, followed by urban trunk roads. Suburban road dusts had a lower pollution level. Moreover, the estimated daily intake (EDI) of PPDs and 6PPD-Q for children was much higher than adults.
N,N'-取代的对苯二胺（PPD）是橡胶轮胎中广泛使用的抗氧化剂，随着轮胎磨损，它们可能会释放并在道路灰尘中积累。作为 N-(1,3-二甲基丁基)-N'-苯基-对苯二胺（6PPD）的臭氧化产物，6PPD-醌（6PPD-Q）对银大麻哈鱼的毒性更高。然而，关于它们的环境行为的研究仍然有限。道路灰尘是 PPD 存在的主要介质，它显著影响其他介质（特别是地表水和颗粒物）中的 PPD 水平。在这项研究中，采集了中国 55 个主要城市的道路灰尘样本，以探讨 PPD 和 6PPD-Q 的分布特征。城市主干道路灰尘样本中总 PPDs（ΣPPDs）和 6PPD-Q 的浓度范围分别为 7.90-727ng/g 和 3.00-349ng/g，中位数浓度分别为 68ng/g 和 49ng/g。6PPD 和 6PPD-Q 是大多数道路灰尘中的主要成分。PPD 和 6PPD-Q 的功能区依赖性污染特征首次表明，城市隧道道路是高度污染区域，其次是城市主干道路。郊区道路灰尘的污染程度较低。此外，儿童对 PPD 和 6PPD-Q 的估计每日摄入量（EDI）远高于成人。
Zotero 插件