Summary
This experimental study characterised iron isotope exchange and fractionation between hematite and aqueous Fe(II) using combined three-isotope and reversal-to-equilibrium methodologies (Frierdich et al., 2018). The work provides quantitative equilibrium fractionation factors applicable to interpreting natural iron cycling processes in aqueous geochemical systems. As suggested by the methodology, the reversal-to-equilibrium approach validates equilibrium isotope partition coefficients.
UK applicability
The findings provide fundamental geochemical data applicable to understanding iron mobilisation and transport in UK soils and groundwater systems, particularly in iron-rich sediments and redox-sensitive environments. However, the study is laboratory-based and does not directly address agronomic or pedological outcomes relevant to UK farming practice.
Key measures
Iron isotope ratios (δ⁵⁶Fe, δ⁵⁷Fe); isotope fractionation factors (Δ⁵⁶Fe); reversal-to-equilibrium approach validation
Outcomes reported
The study experimentally quantified iron isotope fractionation factors between hematite (α-Fe₂O₃) and dissolved Fe(II) using three-isotope and reversal-to-equilibrium approaches. Results provide equilibrium isotope exchange data relevant to understanding iron cycling in natural aqueous systems.
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