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Strategy towards producing relevant and reliable data for the hazard assessment of micro- and nanoplastics in agricultural soils
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This paper outlines a strategy for producing better scientific data on the hazards of micro and nanoplastics in agricultural soils. Current research suffers from a lack of standardized testing methods, unrealistic experimental conditions, and inconsistent materials, making it hard to draw reliable conclusions. The authors provide specific recommendations for more environmentally relevant experiments that could support meaningful regulations to protect soil ecosystems and food safety.
Micro- and nanoplastics (MNPs) are widespread emerging contaminants with many potential direct and indirect effects on soil ecosystems. Ecological soil MNP hazard assessment is thus crucial for a proper risk assessment and the development of environmental protection regulations. However, current hazard assessment testing approaches are hampered by the absence of guidelines, harmonization, and standard reference materials. This article discusses the need for improving testing approaches and provides specific recommendations to increase the relevance and reliability of ecotoxicity data. Our recommendations focus on environmentally relevant experimental designs, guidelines for microplastic test materials selection and characterization, analysis of MNPs and additives in soil and biota, and a proposal for relevant soil physicochemical properties to be assessed during ecotoxicity testing. This article brings novelty to the field of ecological hazard assessment of MNPs in soil by providing solutions and specific recommendations much needed in this field.
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