Are We Speaking the Same Language? Recommendations for a Definition and Categorization Framework for Plastic Debris.

Area of Science:

• Environmental Science
• Materials Science
• Ecotoxicology

Background:

• Plastic litter accumulation poses global environmental, economic, and health risks.
• Inconsistent definitions and classifications of plastic debris, particularly microplastics, impede scientific progress and effective mitigation strategies.
• Ambiguous terminology leads to confusion and miscommunication within the scientific and regulatory communities.

Purpose of the Study:

• To critically evaluate the advantages and disadvantages of a unified terminology for plastic debris.
• To propose a comprehensive definition and categorization framework for plastic debris.
• To identify and address areas of uncertainty in plastic debris classification.

Main Methods:

• A critical discussion of existing terminology and classification approaches for plastic debris.
• Development of a framework incorporating physicochemical properties (e.g., polymer composition, solubility) as defining criteria.
• Inclusion of classifiers such as size, shape, color, and origin for categorization.

Main Results:

• The proposed framework moves beyond simple size classes to include material properties.
• Physicochemical properties are identified as key defining criteria for plastic debris.
• Size, shape, color, and origin are proposed as important classifiers.

Conclusions:

• A unified terminology and a robust categorization framework are essential for advancing plastic pollution research.
• The proposed framework promotes consensus-building among scientists and regulators.
• This approach provides a solid scientific foundation for addressing the global plastic pollution crisis.