Are there alternatives to 6PPD as a rubber antioxidant?

Nevertheless, conclusive studies identifying superior alternatives to 6PPD as a rubber antioxidant remain scarce in the current literature. Urbanization has resulted in an increase in surface runoff, a phenomenon that plays a pivotal role in the transportation of chemicals originating from tire wear into aquatic environments.

What is N-(3-dimethylbutyl p-phenylenediamine 6PPD?

1. Introduction N- (1,3-dimethylbutyl)-N′-phenyl-p-phenylenediamine (6PPD) serves as an antioxidant utilized as an additive in rubber tires to impede oxidation (Cao et al., 2022, Jin et al., 2023a).

Do uncoated rubber infill materials exhibit high levels of 6PPD?

Recent studies have revealed that uncoated rubber infill materials exhibit high levels of 6PPD.

Are rubber particles biohazardous?

Additionally, when rubber particle samples were exposed to synthetic human body fluids such as saliva, gastric juice, duodenal fluid, and bile, the presence of both 6PPD and 6PPD-Q was detected (Armada et al., 2023, Schneider et al., 2020b). This discovery raises concerns regarding the potential biohazardous nature of these compounds.

Which PPD-Q compounds are found in tire rubber granules?

Among the various PPD-Q compounds identified in tire rubber granules (12 μg/g), rubber crumbles (0.3–25 μg/g), and recycled rubber door mats (11–26 μg/g), 6PPD-Q stands out as the most prevalent (Zhao et al., 2023b). Research indicates that sunlight not only catalyzes the formation of 6PPD-Q in TRWPs but also accelerates its breakdown.

Can abiotic processes reprogramme the toxicity of 6ppd-q?

Additionally, it was observed that during UV treatment, hydroxyl groups were detected in the transformation products of 6PPD-Q (Wang et al., 2024), indicating that abiotic processes can induce hydroxylation, potentially reprogramming its toxicity.