Microplastics as pollutants in agricultural soils.

Area of Science:

• Environmental Science
• Soil Science
• Agricultural Science

Background:

• Microplastics (MPs) are recognized as persistent pollutants, with extensive research in aquatic environments.
• Their presence, sources, and behavior in agricultural soils remain incompletely understood.
• Key pollution sources include biosolids, compost, wastewater irrigation, mulching films, and fertilizers.

Purpose of the Study:

• To comprehensively review the sources, fate, and dispersion of MPs in agricultural soils.
• To discuss the interactions and effects of MPs on soil biota.
• To highlight advancements in MP detection and quantification methods.

Main Methods:

• Literature review of existing studies on microplastics in agricultural soils.
• Synthesis of information on MP sources, transport mechanisms, and soil interactions.
• Analysis of current detection and quantification techniques and their limitations.

Main Results:

• Agricultural soils are significant reservoirs for MPs due to various anthropogenic inputs.
• MP fate and dispersion are influenced by soil properties, agricultural practices, and soil organisms.
• Current methods for MP detection and quantification lack standardization.

Conclusions:

• Standardized analytical methods are crucial for accurate MP assessment in soils.
• Further research is needed on MP biomagnification, cytotoxic effects, and nonlinear behavior.
• Developing best management practices and global policies is essential for sustainable agricultural systems.