[A review on modelling bacterial transport in soils]

Area of Science:

• Soil microbiology
• Environmental science
• Biogeochemical cycles

Context:

• Bacterial transport in soils is critical for nutrient cycling and contaminant fate.
• Previous studies often used column experiments with varied results, highlighting methodological inconsistencies.
• Pore-scale investigations and mathematical modeling have been employed to understand bacterial movement.

Purpose:

• To review current methodologies for studying bacterial transport in soils.
• To identify limitations in existing mathematical models for bacterial transport.
• To highlight areas for future research in bacterial transport at field scales.

Summary:

• Current methods for studying bacterial transport in soils, primarily column experiments, yield diverse results, necessitating standardized approaches.
• Mathematical models, such as the convection-dispersion equation, can simulate bacterial transport within limits but often neglect bacterial growth and death.
• Further theoretical development, experimental validation, and scale-exchange studies are required for accurate field-scale prediction of bacterial transport.

Impact:

• Improved understanding of bacterial movement in soil environments.
• Enhanced accuracy in predicting the fate and transport of bacteria in soil.
• Foundation for developing more robust models for soil microbial ecology and environmental management.