@article{RDM,
      recid = {103704},
      author = {Ledingham, Greg and Fang, Yihang and Catalano, Jeffrey},
      title = {Irreversible Trace Metal Binding to Goethite Controlled by  the Ion Size [dataset]},
      publisher = {Washington University in St. Louis},
      address = {2024-07-16},
      number = {RDM},
      abstract = {The dynamics of trace metals at mineral surfaces influence  their fate and bioaccessibility in the environment. Trace  metals on iron (oxyhydr)oxide surfaces display  adsorption–desorption hysteresis, suggesting entrapment  after aging. However, desorption experiments may perturb  the coordination environment of adsorbed metals, the  distribution of labile Fe(III), and mineral aggregation  properties, influencing the interpretation of labile metal  fractions. In this study, we investigated irreversible  binding of nickel, zinc, and cadmium to goethite after  aging times of 2–120 days using isotope exchange. Dissolved  and adsorbed metal pools exchange rapidly, with half times  <90 min, but all metals display a solid-associated fraction  inaccessible to isotope exchange. The size of this  nonlabile pool is the largest for nickel, with the smallest  ionic radius, and the smallest for cadmium, with the  largest ionic radius. Spectroscopy and extractions suggest  that the irreversibly bound metals are incorporated in the  goethite structure. Rapid exchange of labile  solid-associated metals with solution demonstrates that  adsorbed metals can sustain the dissolved pool in response  to biological uptake or fluid flow. Trace metal fractions  that irreversibly bind following adsorption provide a  contaminant sequestration pathway, limit the availability  of micronutrients, and record metal isotope signatures of  environmental processes.},
      url = {http://data.library.wustl.edu/record/103704},
      doi = {https://doi.org/10.7936/6rxs-103704},
}