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Purpose <p>Despite growing interest in bottom sediment valorization, their recycling in agriculture remains limited. This study evaluated the potential use of bottom sediments and their mixtures with water treatment sludge as plant-growing substrates for agricultural and horticultural applications.</p> Methods <p>Zucchini plants were grown on different substrates, including: soil, bottom sediments, sediments mixed with 25% water treatment sludge and soil amended with these mixtures at 5% and 25% rates.</p> Results <p>Both bottom sediments and sediment-sludge mixtures exhibited neutral to alkaline reaction, high sorption capacity and low ecotoxicity. Incorporating these mixtures into an acidic sandy soil improved physico-chemical properties such as cationic exchange capacity, total organic content and pH. Macronutrients in the substrates increased compared to the soil, from 1.5-fold for Mg to 37.1-fold for Ca. Zucchini yields were significantly improved upon soil amendment with the mixtures. The bioaccumulation coefficient indicates reduced metal uptake in treatments using sediment-based mixtures. Compared to the plants from the control soil, the plants in the treatments with substrates made on the basis of bottom sediment exhibited a lower content of Cr (2.7 to 9.9 fold decrease), Fe (1.6 to 1.9), Mn (2.1 to 11.9), Ni (1.8 to 2.5), Pb (4.2 to 6.1) and Zn (2.2 to 3.1).</p> Conclusion <p>Our results support the valorization of bottom sediments for soil improvement in agriculture and horticulture. However, macronutrient (N, P, K) levels remained low in the mixtures, suggesting the need for further research on macronutrient enrichment and nutrient availability.</p>

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Valorization of reservoir bottom sediments as plant-growing media in agriculture and horticulture

  • 期刊论文

  • 发表日期：

    2026年2月2日

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  • Agnieszka Baran,
  • Filip M. G. Tack,
  • Antoine Delemazure,
  • Jerzy Wieczorek,
  • Katarzyna Szarłowicz

摘要

Purpose

Despite growing interest in bottom sediment valorization, their recycling in agriculture remains limited. This study evaluated the potential use of bottom sediments and their mixtures with water treatment sludge as plant-growing substrates for agricultural and horticultural applications.

Methods

Zucchini plants were grown on different substrates, including: soil, bottom sediments, sediments mixed with 25% water treatment sludge and soil amended with these mixtures at 5% and 25% rates.

Results

Both bottom sediments and sediment-sludge mixtures exhibited neutral to alkaline reaction, high sorption capacity and low ecotoxicity. Incorporating these mixtures into an acidic sandy soil improved physico-chemical properties such as cationic exchange capacity, total organic content and pH. Macronutrients in the substrates increased compared to the soil, from 1.5-fold for Mg to 37.1-fold for Ca. Zucchini yields were significantly improved upon soil amendment with the mixtures. The bioaccumulation coefficient indicates reduced metal uptake in treatments using sediment-based mixtures. Compared to the plants from the control soil, the plants in the treatments with substrates made on the basis of bottom sediment exhibited a lower content of Cr (2.7 to 9.9 fold decrease), Fe (1.6 to 1.9), Mn (2.1 to 11.9), Ni (1.8 to 2.5), Pb (4.2 to 6.1) and Zn (2.2 to 3.1).

Conclusion

Our results support the valorization of bottom sediments for soil improvement in agriculture and horticulture. However, macronutrient (N, P, K) levels remained low in the mixtures, suggesting the need for further research on macronutrient enrichment and nutrient availability.