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Insights on Experimental Methodologies and Theoretical Models for Microplastics Transport in Soils and Sediments Based on Meta-analysis by Yuliang Guo; Xunchang Fei is a Engineering article available to read on EtoBox.

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Much work remains to understand the sources, fates, and transport processes of microplastics (MPs) in terrestrial and water environments. Specifically, the transport of MPs in soils and sediments in various locations is underexamined. The transport mechanisms of MPs in soil are complex due to possible blocking, ripening, and straining phenomena. In this study, the methodologies to experimentally simulate MPs transport in soil are thoroughly reviewed. The factors of concern are soil grain size distribution, soil porosity, fluid ionic strength, MPs sizes and type, and the size ratio between MPs and soil. Available experiments only reasonably simulate the MPs transport in shallow beach sand. However, for other transport scenarios in soils, sediments, landfilled MSW, and landfill liners, experimental results are unavailable. Theoretical models are important for understanding the transport processes, but the model selection and fitting are still highly subjective so far. Six models based on advection-dispersion equations are used to fit the 29 sets of experimental results in the available studies. Akaike weights and post hoc analysis are used to further compare the fitting performances.

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Author

Yuliang Guo; Xunchang Fei

Publisher

Springer Science and Business Media LLC

Published

2023

Language

EN

Field

Engineering (Physical Sciences)