Microplastics in water: types, detection, and removal strategies

Area of Science:

• Environmental Science
• Ecotoxicology
• Materials Science

Background:

• Microplastics are pervasive environmental contaminants, leading to the concept of the 'Plasticene' era.
• These minuscule particles pose significant threats to ecosystems, including teratogenic and mutagenic effects in organisms.
• Microplastics originate from primary sources or the fragmentation of larger plastic debris.

Purpose of the Study:

• To review and discuss biological treatment strategies for microplastic removal.
• To highlight the effectiveness of bio-flocculants and activated sludge in microplastic separation.
• To address the limitations of conventional physical and chemical removal methods due to cost and scalability.

Main Methods:

• Review of existing literature on microplastic removal techniques.
• Focus on biological treatment strategies, including microalgae and activated sludge.
• Comparison of biological methods with conventional physical and chemical processes like coagulation, flocculation, sedimentation, and ultrafiltration.

Main Results:

• Biological methods, particularly activated sludge, demonstrate high microplastic removal efficiency.
• Microalgae exhibit natural capabilities for microplastic remediation.
• Biological approaches present a cost-effective alternative to conventional techniques for large-scale application.

Conclusions:

• Biological avenues, such as bio-flocculants and activated sludge, are promising for effective microplastic removal.
• These methods offer a sustainable and efficient solution to the growing microplastic pollution crisis.
• Further research into biological remediation strategies is crucial for environmental protection.