Ferrihydrite is a poorly crystallized mineral and one of the most abundant iron minerals found in soils and sediments. The mineralogical transformation of ferrihydrite into FeII bearing minerals represents a potential way to improve the soil self-remediation capacity. Indeed, reduction by FeII may be a significant abiotic pathway in the natural attenuation of environmental contaminants including organic and inorganic pollutants. The aim of this laboratory study was to investigate the FeII induced mineralogical transformations of three matrices: ferrihydrite, ferrihydrite-rich sand and a pristine soil under static batch and flow through conditions. Since sorbed or structural FeII is more reactive than minerals bearing only FeIII to promote the remediation of various soil pollutants, generation of FeII bearing minerals in soil-packed columns was optimized. The starting and resulting solids were characterized by X-ray diffraction (XRD), Mössbauer spectrometry, Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM).
|Title of host publication||Water-Rock Interaction|
|Number of pages||4|
|Publication status||Published - Jan 1 2010|
ASJC Scopus subject areas
- Environmental Science(all)
- Earth and Planetary Sciences(all)