Contrasting effects of siderophores pyoverdine and desferrioxamine B on the mobility of iron, aluminum, and copper in Cu-contaminated soils

Siderophores are biogenic metallophores that can play significant roles in the dynamics of a range metals, including Cu, soil. Understanding impact siderophores on mobility and availability metals soil is required to optimize efficiency remediation processes such as phytoextraction. This study compared ability desferrioxamine B (DFOB) pyoverdine (Pvd) mobilize series Cu-contaminated soils, investigated extent their metal mobilization changed over time with level Cu contamination were supplied (or not) soils was assessed through total concentration 0.005 M CaCl2 extract. DFOB selectively mobilized Fe Al while Pvd also Ni, Co, V As but lesser degree. The 1:1 relationship between extract + from solid phase suggests by ligand-controlled dissolution. accumulation enhanced adsorption at surface constituents detriment two siderophores. decreased 22 days. According 15N-Pvd analyses, degradation least partly contributed progressive reduction Pvd. behind these results relevance for manipulating (and Fe) discussed.