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Showing 1 to 7 of 7 for “"Fe speciation"”.
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A Comparative Study of Iron and Zinc Concentration, Localization, Speciation and Bioavailability in Two Wheat Cultivars
Iron (Fe) and Zinc (Zn) deficiency remains a prevalent nutritional disorder worldwide, disproportionally affecting people of low and middle income countries due to the reliance on non-meat sources in the diet. Cereals, a relatively poor Fe and Zn source, account for over 50% of the energy intake in …
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Bioavailable Iron in Equatorial Pacific Ocean Aerosol Samples
Oceanic iron (Fe) fertilization experiments performed in remote regions have established that Fe additions draw carbon into the ocean, at least over the months-long time frame of the experiments. However, the mechanisms that control Fe speciation in atmospheric aerosol particles before and after …
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Unraveling Paleoenvironmental Stress in the Late Devonian and Mississippian: Insights into Redox Dynamics and Photosynthetic Adaptations Elucidated Through Geochemical Proxies
… both marine and terrestrial ecosystems. The proliferation of vascular plants on land, major marine transgressions over the continents, and climatic changes also occurred during this time. The mechanisms behind the Late Devonian mass extinctions have been explored by many researchers. One proposed …
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Geochemical investigations of the late early Cambrian extinctions
… interpretation. In addition, iron speciation and mercury content analyses from the Flatwoods Member within the stratigraphic interval tentatively linked to the olenellid extinction suggest the occurrence of transient local euxinic (anoxic, sulfidic) conditions. These findings give …
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REACTIVE TRANSPORT OF IRON AND HYDROCHAR COLLOIDS IN A HYDROCARBON-CONTAMINATED SUBSURFACE ENVIRONMENT
… of terminal electron acceptors, e.g., ferric iron [Fe(III)]. Subsurface biogeochemical and transport processes are slow in making these components available to microorganisms that degrade the contaminants. Biostimulation is thus designed to increase nutrient bioavailability and to …
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Influence of Iron Speciation on Redox Cycling and Reactivity With Persistent Organic Contaminants
In this study, FeII/FeIII complexes with low molecular weight organic ligands were used as surrogate models for studying iron-mediated redox processes. Initially, the redox reactivity of Fe II-organic ligand complexes with nitro-organic explosives was investigated. Ligand-screening experiments …
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Reconstructing local redox conditions, mineral precipitation processes and nutrient availability in seawater during deposition of the Transvaal Supergroup, South Africa
… states and primary mineral precipitation, affecting the cycling of other trace elements and nutrients. While carbonate minerals are commonly used as geochemical archives, reconstructions using IF have proved more challenging, with many studies analysing bulk powders. However, reconstructing …