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<p>The study explores utilizing rapeseed cake, an agricultural by-product, for the biosorption of key micronutrients (Cu, Mn, Fe, Zn) to produce micronutrient-rich fertilizers. Aiming to bridge the gap in transforming agricultural waste into valuable inputs, the research underscores the novel approach’s contribution to sustainable waste management. The study employed various models (Thomas, Yoon–Nelson, Adams–Bohart) and experimental methods (batch kinetic, adsorption isotherm) to investigate the adsorption processes and optimize process parameters, facilitating the scalability of biosorption for industrial use. Findings indicate that the optimal conditions for biosorption, as per the Adams–Bohart model, are a pH of 3, a 5&#xa0;ml/min feed rate, and a 5&#xa0;g biomass ratio, maximizing sorption efficiency. The produced fertilizers were subjected to multi-element analysis by ICP-OES and it was confirmed that they met the standards set in the European regulation by containing sufficient macro and micronutrients and not exceeding the toxic element limits. This micronutrient-enriched fertilizer holds potential for sustainable agriculture, highlighting rapeseed cake’s value in nutrient recycling. This novel approach underscores the potential of agricultural residues in sustainable agriculture, advancing efficient waste-to-resource conversion, and gives insights about micronutrient biosorption parameters on rapeseed cake for potential usage in other fields in the future.</p> Graphical Abstract <p></p>

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Optimization and Impact of Rapeseed Cake Biosorption for Nutrient-Enriched Fertilizer Production

  • 期刊论文

  • 发表日期：

    2025年5月2日

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  • Derya Çalış,
  • Dawid Skrzypczak,
  • Mateusz Samoraj,
  • Grzegorz Izydorczyk,
  • Katarzyna Mikula,
  • Michał Jakub Witka,
  • Anna Witek-Krowiak,
  • Katarzyna Chojnacka

摘要

The study explores utilizing rapeseed cake, an agricultural by-product, for the biosorption of key micronutrients (Cu, Mn, Fe, Zn) to produce micronutrient-rich fertilizers. Aiming to bridge the gap in transforming agricultural waste into valuable inputs, the research underscores the novel approach’s contribution to sustainable waste management. The study employed various models (Thomas, Yoon–Nelson, Adams–Bohart) and experimental methods (batch kinetic, adsorption isotherm) to investigate the adsorption processes and optimize process parameters, facilitating the scalability of biosorption for industrial use. Findings indicate that the optimal conditions for biosorption, as per the Adams–Bohart model, are a pH of 3, a 5 ml/min feed rate, and a 5 g biomass ratio, maximizing sorption efficiency. The produced fertilizers were subjected to multi-element analysis by ICP-OES and it was confirmed that they met the standards set in the European regulation by containing sufficient macro and micronutrients and not exceeding the toxic element limits. This micronutrient-enriched fertilizer holds potential for sustainable agriculture, highlighting rapeseed cake’s value in nutrient recycling. This novel approach underscores the potential of agricultural residues in sustainable agriculture, advancing efficient waste-to-resource conversion, and gives insights about micronutrient biosorption parameters on rapeseed cake for potential usage in other fields in the future.

Graphical Abstract