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Related Experiment Video

Updated: Mar 26, 2026

Author Spotlight: Unraveling the Role of Earthworms in Enhancing Mineral Weathering for CO2 Removal
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Restoring Ecosystem Function in Degraded Urban Soil Using Biosolids, Biosolids Blend, and Compost.

N T Basta, D M Busalacchi, L S Hundal

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    Summary

    Biosolids and compost amendments significantly improved degraded industrial soils, enhancing vegetation and soil health. Biosolids generally outperformed compost, with minimal risk to surface water quality.

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    Area of Science:

    • Environmental Science
    • Soil Science
    • Ecology

    Background:

    • Degraded soils at former industrial sites pose ecological challenges.
    • Restoration efforts require effective soil amendments to improve ecosystem function.
    • Minimizing surface water contamination is crucial during site remediation.

    Purpose of the Study:

    • To evaluate compost, biosolids, and biosolids blends for improving soil ecosystem function.
    • To assess the impact of these amendments on soil quality and vegetation.
    • To determine the potential effects on surface water quality.

    Main Methods:

    • Application of biosolids, compost, or a biosolids blend to degraded soil.
    • Monitoring of soil properties, vegetation establishment, and earthworm populations.
    • Analysis of rainfall runoff for nutrients and microconstituents over three years.

    Main Results:

    • Amendments enhanced soil quality, nutrient availability, and vegetation cover.
    • Biosolids treatments generally outperformed compost in improving soil function and biodiversity.
    • Increased nitrogen and phosphorus were observed in runoff, but microconstituent levels were below harmful thresholds.

    Conclusions:

    • Biosolids and compost are effective for restoring degraded industrial soils.
    • Biosolids show superior performance compared to compost for soil ecosystem recovery.
    • Careful management and runoff control are recommended to mitigate nutrient and sediment loss during restoration.