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September 8, 2026International Journal of Environmental Science and TechnologyOpen Access

Comparative abiotic, regulatory-aligned assessment of nutrient and trace-metal release from secondary geomaterials for soil application

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Authors

GGGiulio GalaminiGMG. MalvoltiMLM. Lezzerini

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Overview

Comparative in vitro study reveals contrasting nutrient and toxic metal release from industrial secondary geomaterials, indicating differing regulatory viability for soil application.

Key Points

  • Compare nutrient release and trace-metal mobility in two industrial secondary geomaterials with contrasting mineralogical compositions to evaluate their suitability for soil application under regulatory standards.
  • Characterized the mineralogy and bulk chemistry of RE.WO (derived from mineral wool construction waste) and BO50 (a rock-cutting by-product).
  • Conducted abiotic, time-resolved, regulatory-aligned in vitro leaching tests under weakly acidic, chelating, and weakly alkaline conditions.
  • RE.WO exhibited an amorphous glassy matrix with rapid dissolution kinetics and high cumulative cation release, providing short-term micronutrient extractability (Mn, Cu, Zn) alongside higher mobilization of regulated trace metals.
  • BO50 was dominated by crystalline silicates and potassium-bearing phases, demonstrating low solubility, sustained potassium release, and lower mobilization of regulated trace elements.
  • Under European Regulation 2019/1009 criteria, BO50 aligns more readily with virgin material or by-product pathways, whereas RE.WO trace-metal mobilization likely restricts its use to non-food applications.

Cite This Study

Galamini et al. (2026) studied this question.

synapsesocial.com/papers/6a9fd7e758e84d0ff5b4705chttps://doi.org/10.1007/s13762-026-07435-3
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