Journal ArticleDOI
Development of a sequential extraction procedure for iron: implications for iron partitioning in continentally derived particulates
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In this paper, the development of a sequential extraction procedure for iron in modern and ancient sediments is presented, which recognizes seven operationally derived iron pools: (1) carbonate associated Fe (Fe carb ), including siderite and ankerite; (2) easily reducible oxides (Fe ox1 ), including ferrihydrite and lepidocrocite; and (3) reducible Oxides(Fe ox2 ), including goethite, hematite and akaganeite, (4) magnetite (Fe mag ); (5)About:
This article is published in Chemical Geology.The article was published on 2005-01-25. It has received 975 citations till now. The article focuses on the topics: Ankerite & Lepidocrocite.read more
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Late-Neoproterozoic deep-ocean oxygenation and the rise of animal life.
TL;DR: The iron content of deep-sea sediments shows that the deep ocean was anoxic and ferruginous before and during the Gaskiers glaciation 580 million years ago and that it became oxic afterward.
Journal ArticleDOI
Ferruginous Conditions: A Dominant Feature of the Ocean through Earth's History
TL;DR: In this paper, a detailed appraisal of the influence of ferruginous seafloor conditions on the evolution of biogeochemical cycles, climate, and the biosphere is increasingly required.
Journal ArticleDOI
Ferruginous Conditions Dominated Later Neoproterozoic Deep-Water Chemistry
Donald E. Canfield,Simon W. Poulton,Andrew H. Knoll,Guy M. Narbonne,Gerry Ross,Tatiana Goldberg,Harald Strauss +6 more
TL;DR: It is reported that through much of the later Neoproterozoic, anoxia remained widespread beneath the mixed layer of the oceans; deeper water masses were sometimes sulfidic but were mainly Fe2+-enriched, marking a return to ocean chemistry not seen for more than one billion years of Earth history.
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The Iron Biogeochemical Cycle Past and Present
TL;DR: This paper presented a kinetic model evaluating the supply of bioavailable Fe to surface seawater by ferrihydrite dissolution, photoreduction and siderophore-aided dissolution.
Journal ArticleDOI
Is there a future for sequential chemical extraction
TL;DR: This review uses evidence from the literature to consider the usefulness and limitations of sequential extraction, and discusses typical applications from the recent literature for which sequential extraction can provide useful and meaningful information.
References
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Journal ArticleDOI
Sequential extraction procedure for the speciation of particulate trace metals
TL;DR: In this paper, an analytical procedure involving sequential chemicai extractions was developed for the partitioning of particulate trace metals (Cd, Co, Cu, Ni, Pb, Zn, Fe, and Mn) into five fractions: exchangeable, bound to carbonates, binding to Fe-Mn oxides and bound to organic matter.
Book
The iron oxides: structure, properties, reactions, occurrences and uses.
R. M. Cornell,Udo Schwertmann +1 more
TL;DR: In this article, the authors introduce the concept of iron oxides and their properties, including surface chemistry and Colloidal stability, as well as their properties in terms of surface area and porosity.
Journal ArticleDOI
Iron Oxide Removal from Soils and Clays by a Dithionite-Citrate System Buffered with Sodium Bicarbonate
TL;DR: In this article, the bicarbonate-buffered Na2S2O4-citrate system was used for removing free iron oxides from latosolic soils, and the least destructive of iron silicate clays.
Book ChapterDOI
Iron oxide removal from soils and clays by a dithionite-citrate system buffered with sodium bicarbonate
O P Mehra,M L Jackson +1 more
TL;DR: In this article, the bicarbonate-buffered Na 2 S 2 O 4 -citrate system was used for removing free iron oxides from latosolic soils, and the least destructive of iron silicate clays.
Journal ArticleDOI
DITHIONITE- AND OXALATE-EXTRACTABLE Fe AND Al AS AIDS IN DIFFERENTIATING VARIOUS CLASSES OF SOILS
J. A. McKeague,J. H. Day +1 more
TL;DR: In this paper, acid ammonium oxalate extracts and in dithionite-citrate-bicarbonate extracts of a wide range of Canadian soils, several oxide and silicate minerals, and some amorphous preparations of iron or aluminum and silica.