Characterization of nutrient leaching of non-amended and amended bioretention cells

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Bioretention cells play a vital role in urban stormwater management, but their efficiency in retaining nutrients depends heavily on the use of soil amendments. In non-amended bioretention systems, nutrient leaching—particularly nitrogen and phosphorus—can be substantial due to limited adsorption capacity and rapid percolation through the soil matrix. This often results in the unintended release of nutrients into underlying groundwater or nearby water bodies, contributing to eutrophication risks. Conversely, amended cells, incorporating materials such as biochar, compost, zeolite, or iron-rich substrates, enhance nutrient retention through improved cation exchange capacity, increased organic matter, and chemical binding mechanisms. These amendments not only reduce leachate concentrations but also support microbial processes that aid in nutrient transformation and immobilization. Evaluating the nutrient profiles, leachate volume, and long-term retention performance of amended versus non-amended cells provides critical insight into designing sustainable stormwater treatment systems. Comparative characterization highlights the necessity of selecting appropriate amendments tailored to local hydrological and environmental conditions to minimize nutrient loss and optimize treatment outcomes.


#NutrientLeaching #BioretentionCells #StormwaterManagement #SoilAmendments #WaterQuality #UrbanHydrology #GreenInfrastructure #NitrogenRetention #PhosphorusControl #EcoEngineering #SustainableDrainage #BiocharApplication #EnvironmentalProtection #CompostAmendment #HydrologicalPerformance





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