Jump to Main Content
- Biswakarma, Jagannath; Kang, Kyounglim; Borowski, Susan C.; Schenkeveld, Walter D.C.; Kraemer, Stephan M.; Hering, Janet G.; Hug, Stephan J.
- Environmental science & technology 2018 v.53 no.1 pp. 88-97
- EDTA (chelating agent); air; anaerobic conditions; catalytic activity; electron transfer; infrared spectroscopy; iron; irradiation; isotopes; kinetics; lepidocrocite; ligands; oxides; pH; soil; surface water; ultraviolet radiation
- ... Dissolution of iron(III)phases is a key process in soils, surface waters, and the ocean. Previous studies found that traces of Fe(II) can greatly increase ligand controlled dissolution rates at acidic pH, but the extent that this also occurs at circumneutral pH and what mechanisms are involved are not known. We addressed these questions with infrared spectroscopy and ⁵⁷Fe isotope exchange experime ...
- Kang, Kyounglim; Schenkeveld, Walter D. C.; Biswakarma, Jagannath; Borowski, Susan C.; Hug, Stephan J.; Hering, Janet G.; Kraemer, Stephan M.
- Environmental science & technology 2018 v.53 no.1 pp. 98-107
- anaerobic conditions; deferoxamine; ferrihydrite; goethite; hematite; iron; lepidocrocite; ligands; nutrient deficiencies; pH; redox reactions; reducing agents; siderophores
- ... Dissolution of Fe(III) (hydr)oxide minerals by siderophores (i.e., Fe-specific, biogenic ligands) is an important step in Fe acquisition in environments where Fe availability is low. The observed coexudation of reductants and ligands has raised the question of how redox reactions might affect ligand-controlled (hydr)oxide dissolution and Fe acquisition. We examined this effect in batch dissolution ...