Mineralogical controls on nutrient release and trace-metal mobility from basaltic dust by-product

This study evaluates BO50, a basaltic by-product derived from rock-cutting operations, as a high-potential mineral amendment. Unlike synthetic alternatives, this basaltic material is characterized by a stable crystalline structure that ensures a sustained, slow release of potassium (K) while maintaining negligible mobilization of toxic elements. Due to its natural origin and low environmental risk, BO50 aligns with EU Regulation 2019/1009 standards for virgin materials or by-products (CMC 1/11). This highlights the recovery of basaltic waste as a safe, long-term nutrient source that bypasses the contamination risks often associated with industrial "End-of-Waste" products.