Related Experiment Video
Updated: Jun 24, 2026

Resource Recycling of Red Soil to Synthesize Fe2O3/FAU-type Zeolite Composite Material for Heavy Metal Removal
Published on: June 2, 2022
Investigation of Wüstite (FeO) dissolution: implications for reductive dissolution of ferric oxides
Je-Hun Jang1, Susan L Brantley
1Center for Environmental Kinetics Analysis, Earth and Environmental Systems Institute, 2217 EES Building, Pennsylvania State University, University Park, Pennsylvania 16802, USA. jhjang2004@gmail.com
Abstract:
The pH-dependent dissolution flux of FeO (wüstite, a ferrous oxide) was measured in this study; flux = k{H+}n (moV/m2/s), where k = 10(-4.95) and n = 0.64. This flux was consistent with theoretical predictions based on the rate of water exchange of hexaaquo Fe2+. Interestingly, when compared to published data, the pH-dependent dissolution flux of FeO defined an upper limit for the reductive dissolution fluxes of iron(III) (oxyhydr)oxides, including bacterial dissimilatory iron reduction (DIR). A wide range of dissolution fluxes across several orders of magnitude has been reported for iron(III) (oxyhydr)oxides in the literature and the fluxes were affected by various experimental variables, e.g., pH, ligands, chemical reductants, and bacteria. We concluded that (i) the reductive dissolution fluxes of iron(III) (oxyhydr)oxides, including bacterial DIR, are ultimately bracketed by the detachment rate of reduced Fe(II) from the surface and (ii) the maximum flux can be approached when the mole fraction of reduced Fe(II) at the surface is close to unity.
Related Concept Videos
Sample Preparation for Analysis: Advanced Techniques
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...
Precipitation and Co-precipitation
Factors Affecting Dissolution: Particle Size and Effective Surface Area
Washing, Drying, and Ignition of Precipitates
Acid Mine Drainage
Microbes and Other Elemental Cycles
