Microplastics and nanoplastics: Source, behavior, remediation, and multi-level environmental impact

Area of Science:

• Environmental Science
• Ecotoxicology
• Materials Science

Background:

• Plastic pollution is a pervasive global issue, with persistent microplastics (MPs) and nanoplastics (NPs) contaminating air, water, and soil.
• These particles, ranging from <1 μm to 5 mm, are readily ingested by organisms, leading to bioaccumulation and biomagnification throughout food webs.
• The environmental persistence and fragmentation of plastics create a significant threat to biodiversity and ecosystem health.

Purpose of the Study:

• To review the sources, environmental fate, degradation, fragmentation, transport, and ecotoxicity of MPs and NPs.
• To elucidate the harmful effects of plastic particles on marine organisms, soil biota, plants, mammals, and humans.
• To highlight remediation technologies and global policies for managing plastic waste.

Main Methods:

• Comprehensive literature review of existing studies on microplastics and nanoplastics.
• Analysis of data on the presence, distribution, and impact of MPs and NPs across various environmental compartments.
• Synthesis of information on ecotoxicity, remediation strategies, and legislative measures.

Main Results:

• MPs and NPs originate from diverse sources and are ubiquitously present in terrestrial and aquatic environments.
• Ingestion of MPs and NPs leads to bioaccumulation and biomagnification, with documented adverse effects across multiple trophic levels, including humans.
• Effective management necessitates a combination of technological, regulatory, and policy interventions.

Conclusions:

• Plastic particles pose a significant and complex threat to environmental health and all life forms.
• Addressing plastic pollution requires integrated strategies encompassing waste management, monitoring, and robust regulatory frameworks.
• Further research and global cooperation are crucial for mitigating the impacts of microplastics and nanoplastics.