Ferrihydrite - an overview | ScienceDirect Topics
网页Ferrihydrite ((Fe 3+ 10 O 14 (OH) 2)) forms a significant proportion of soils, especially soils formed under cool, moist conditions and it occurs as a pre-terrestrial weathering product in meteorites. It provides the inorganic base of ferritin in biological systems and is present as rust and in acid mine drainage.
The interaction between ferrihydrite and arsenic: A review of ...
网页2024年2月1日 · The application of ferrihydrite has demonstrated the capacity to mitigate the toxicity of heavy metals to plants in soil, without any impact on plant biomass or enzyme activity in polluted soil. Moreover, it yields a long-term positive effect on protecting the health of soil ecosystems ( Vangronsveld et al., 1995 ; Pérez-De-Mora et al., 2011 ).
Ferrihydrite in soils | Eurasian Soil Science - Springer
网页2016年7月14日 · Ferrihydrite—an ephemeral mineral—is the most active Fe-hydroxide in soils. According to modern data, the ferrihydrite structure contains tetrahedral lattice in addition to the main octahedral lattice, with 10–20% of Fe being concentrated in the former. The presence of Fe tetrahedrons influences the surface properties of this mineral.
Ferrihydrite: A review of structure, properties and occurrence in ...
网页Ferrihydrite occurs in soils undergoing rapid weathering, and in soils containing soluble silicate or organic anions which inhibit the formation of more crystalline iron oxides. Because of its very high specific surface area and adsorptive capacity (analogous to allophane), ferrihydrite can profoundly influence soil properties, even if present ...
Ferrihydrite Growth and Transformation in the Presence of …
网页2019年11月13日 · Ferrihydrite (Fh) is a poorly crystalline Fe(III)-oxyhydroxide found in abundance in soils and sediments. With a high specific surface area and sorption capacity at circumneutral pH, ferrihydrite is an important player in the biogeochemical cycling of nutrients and trace elements in redox-dynamic environments.
(PDF) Ferrihydrite in soils - ResearchGate
网页2016年7月1日 · Ferrihydrite—an ephemeral mineral—is the most active Fe-hydroxide in soils. According to modern data, the ferrihydrite structure contains tetrahedral lattice in addition to the main octahedral...
Surface and mineral structure of ferrihydrite - ScienceDirect
网页2013年3月15日 · In soils, the natural nano-oxide fraction creates a reactive surface area of 3–30 m 2 /g soil (Hiemstra et al., 2010). This number may look modest, but only a few m 2 /g may easily represent a reactive surface area of one million m 2 or more in a soil pedon of just 1 m 2. It illustrates the potential of nanoparticles to react in nature.
The Structure of Ferrihydrite, a Nanocrystalline Material | Science
网页2007年6月22日 · Ferrihydrite is ubiquitous in many near-surface environments (1, 2) and is routinely used in industrial applications such as direct coal liquefaction and metallurgical processing (3, 4). It occurs in pristine soils and sediments as the precursor to hematite and often in areas contaminated by acid mine drainage (5).
Ferrihydrite transformations in flooded paddy soils: rates, …
网页2022年7月8日 · Using X-ray diffraction analysis, we show near-complete transformation of the ferrihydrite to lepidocrocite and goethite within six weeks in the soil with the highest iron (II) release, and slower transformation with higher ratios of goethite to lepidocrocite in soils with lower iron (II) release.
Fe(II)-Catalyzed Transformation of Organic Matter–Ferrihydrite ...
网页2018年9月7日 · Ferrihydrite is a common Fe mineral in soils and sediments that rapidly transforms to secondary minerals in the presence of Fe (II). Both the rate and products of Fe (II)-catalyzed ferrihydrite transformation have been shown to be significantly influenced by natural organic matter (NOM).