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Characterization Of Emissions From Rubber Modified Asphalt And Their Impact On Environmental Burden: Insights Into Composition Variability And Hazard Assessment.

Home
Research Domains
Engineering
Environmental Engineering
Air Pollution Modelling And Control
Characterization Of Emissions From Rubber Modified Asphalt And Their Impact On Environmental Burden: Insights Into Composition Variability And Hazard Assessment.

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Characterization of emissions from rubber modified asphalt and their impact on environmental burden: Insights into composition variability and hazard assessment.

Lingwen Li¹, Tao Zhou¹, Liping Cao¹

¹School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, PR China.

Journal of Hazardous Materials

|July 30, 2024

View abstract on PubMed

Summary

This summary is machine-generated.

Keywords:

Asphalt fractions Asphalt fumes Emission behavior Environmental burden

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Recycling tires into rubber modified asphalt (RMA) produces hazardous emissions. This study quantifies these emissions, finding polycyclic aromatic hydrocarbons (PAHs) are major contributors to ozone and aerosol formation.

Area of Science:

Environmental Science
Materials Science
Chemical Engineering

Background:

Rubber modified asphalt (RMA) offers a sustainable solution for waste tire recycling.
Concerns exist regarding hazardous fume emissions during RMA production and use.
Understanding emission characteristics is crucial for environmental risk assessment.

Purpose of the Study:

To analyze the emission behavior of RMA under thermal conditions, focusing on crumb rubber size.
To quantify Ozone Formation Potential (OFP) and Secondary Organic Aerosol Formation Potential (SOAFP).
To identify key pollutants and their sources contributing to environmental burden.

Main Methods:

Utilized a specialized apparatus to measure emissions from RMA.
Varied crumb rubber size and thermal exposure duration.

Rubber particle size

Quantified emissions of hydrogen sulfide (H₂S), volatile organic compounds (VOCs), and polycyclic aromatic hydrocarbons (PAHs).

Main Results:

Distinct emission periods observed: H₂S (0-150 min), VOCs (0-270 min).
Polycyclic aromatic hydrocarbons (PAHs) were primary contributors to OFP (approx. 65%) and SOAFP (25%-60%).
Emission sources transition from rubber to petroleum asphalt with increasing thermal exposure.

Conclusions:

Crumb rubber size and thermal duration significantly impact VOC emissions and environmental burdens.
PAHs and high molecular weight aliphatic hydrocarbons (ALHs) are key contributors to OFP and SOAFP.
Targeted emission suppression strategies are necessary for sustainable RMA applications.