Developments in advanced oxidation processes for removal of microplastics from aqueous matrices

Area of Science:

• Environmental Science
• Chemical Engineering
• Toxicology

Background:

• Microplastics (MPs) are persistent environmental contaminants with diverse sources.
• MPs pose risks to human health and aquatic ecosystems.
• Current removal techniques have limitations in efficiency and degradation.

Purpose of the Study:

• To review the sources, occurrence, transport, and health risks of microplastics.
• To evaluate advanced oxidation processes (AOPs) for microplastic removal from aqueous matrices.
• To identify research gaps and future trends in microplastic remediation.

Main Methods:

• Comprehensive literature review on microplastic pollution.
• Analysis of advanced oxidation processes (AOPs) for microplastic degradation.
• Discussion of factors influencing MP degradation and mechanistic insights.

Main Results:

• AOPs demonstrate superior catalytic efficacy for microplastic degradation (30-95%) compared to biological methods (<15%).
• Photocatalytic degradation mechanisms and risks of intermediates require further investigation.
• Real-world matrix performance and toxicity bioassays for AOPs are needed.

Conclusions:

• AOPs are a promising remediation strategy for microplastic pollution.
• Further research is essential to validate AOPs under environmental conditions and assess metabolite toxicity.
• Addressing microplastic pollution requires continued research into efficient and safe removal technologies.