Tackling Microplastic Pollution in Plastic Recycling: Key Findings from Recent Research

A recent study led by Go Suzuki and his team has uncovered significant insights into the generation and discharge of microplastics during the mechanical recycling of plastic waste. Here are the major takeaways:

Microplastics Generation Identified: The study reveals that microplastics are unintentionally produced during the mechanical recycling of various plastics. Different types of plastics yield varying sizes and quantities of microplastic particles.

Global Emission Estimates: The research projects a significant rise in microplastic emissions from recycling processes, increasing from 0.017 Mt in 2000 to 0.749 Mt by 2060 if current practices remain unchanged.

Regional Impact: Non-OECD regions, particularly Asia and Africa, will experience the most substantial increases in microplastic emissions due to growing plastic waste and recycling activities. OECD countries will see a smaller, yet notable, rise.

Role of Wastewater Treatment: Implementing primary wastewater treatment can drastically reduce microplastic discharge from recycling facilities. Untreated wastewater remains a major contributor to environmental microplastic levels.

Policy Recommendations: To achieve global pollution reduction goals, such as those outlined in the G7 Hiroshima Leaders’ Communiqué and the Osaka Blue Ocean Vision, the study recommends widespread adoption of primary wastewater treatment at recycling facilities, reducing single-use plastics, and enhancing recycling technologies.

Microplastic Generation Factors: Findings show that the type of polymer and added chemicals influence microplastic generation. This insight is crucial for developing targeted strategies to manage and reduce emissions.

The research underscores the urgent need for global cooperation to implement effective wastewater treatment and reduce single-use plastics. By taking these steps, we can move closer to a sustainable and circular plastic economy.

Global discharge of microplastics from mechanical recycling of plastic waste

• March 2024
• Environmental Pollution 348(10):123855

• DOI:
• 10.1016/j.envpol.2024.123855

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