Environmental Occurrence, Influencing Factors, and Toxic Effects of 6PPD-Q

Area of Science:

• Environmental Chemistry
• Ecotoxicology
• Public Health

Background:

• The antioxidant 6PPD is crucial for tire longevity but converts to 6PPD-Q in the environment.
• 6PPD-Q is released via tire wear particles and is found across atmospheric, aquatic, and terrestrial systems.
• This compound exhibits bioaccumulation potential and significant toxicity, raising public health concerns.

Purpose of the Study:

• To review the environmental distribution and occurrence of 6PPD-Q.
• To examine factors influencing 6PPD-Q levels, including environmental conditions and traffic.
• To discuss the toxicological effects of 6PPD-Q and propose management strategies.

Main Methods:

• Literature review of environmental occurrence and toxicology studies.
• Analysis of factors affecting 6PPD-Q distribution (precipitation, traffic, sunlight, particle size).
• Synthesis of toxicological data and environmental fate information.

Main Results:

• 6PPD-Q is widespread in various environmental compartments.
• Environmental factors like precipitation and traffic significantly influence 6PPD-Q concentrations.
• Toxicological data indicate risks to aquatic and potentially terrestrial organisms.

Conclusions:

• A comprehensive management framework for 6PPD-Q is proposed, focusing on source reduction, process regulation, and treatment.
• Further research is needed to address knowledge gaps in environmental fate and toxicological impacts.
• Effective management is crucial to mitigate the risks associated with 6PPD-Q pollution.