Nanoscale zero-valent iron mitigates arsenic mobilization and accumulation in Sinapis alba grown on a metal(loid)-polluted soil treated with a dunite mining waste-compost amendment

Abstract Background and aim The use of amendments to immobilize metals in polluted soils is a widely accepted remediation approach, the framework circular economy, produced from mining and/or biomass waste have gained relevance. However, application such can also mobilize metalloids. Here we propose combination nanoscale zero-valent iron nanoparticles (nZVI) with dunite (mining waste) compost for restoration soil affected by high concentrations As metals. Methods To this end, treated pots containing combinations dunite, compost, nZVI 75 days. In addition, Sinapis alba was used evaluate effects on pollutant accumulation plant. mobility pollutants monitored through TCLP extraction sampling pore water. Furthermore, pH, available P, cation exchange capacity (CEC) were determined. Results Dunite led immobilization metals, supplied Mg, thus improving CEC. On other hand, increased nutrient content, promoted plant growth. amendment caused dramatic increase plants. Finally, two found be most appropriate strategy since it not only prevented mobilization but added nutrients soil, promoting Conclusion proved effective simultaneously