Summary
This laboratory study employs combined three-isotope and reversal-approach experimental methods to characterise iron isotope fractionation during exchange reactions between hematite (α-Fe₂O₃) and aqueous Fe(II). By constraining equilibrium conditions through multiple isotopic tracers, the work refines fundamental understanding of iron isotope behaviour in mineral–water systems. Although the research is primarily geochemical in focus, improved calibration of iron isotope fractionation factors may support interpretation of iron cycling in natural soils and aqueous environments.
UK applicability
The findings provide fundamental geochemical baseline data that may inform interpretation of iron isotope signatures in UK soil and water systems, though direct agronomic or policy application is limited. The work contributes to methodological rigour in isotope geochemistry relevant to soil and environmental science research.
Key measures
Iron isotope ratios (δ56Fe, δ57Fe); equilibrium fractionation factors (Δ56Fe values) between hematite and dissolved Fe(II)
Outcomes reported
The study quantified iron isotope fractionation during exchange between hematite and aqueous Fe(II) using three-isotope and reversal-approach methodologies. The research refines equilibrium isotopic fractionation factors relevant to interpreting iron cycling in natural mineral–water systems.
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