ArticleChemical geology2018
Simultaneously Quantifying Ferrihydrite and Goethite in Natural Sediments Using the Method of Standard Additions with X-ray Absorption Spectroscopy.
Article in Chemical geology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed.
- Stabilization of U(V) and U(VI) in Goethite Formed by Recrystallization of Fe-Oxyhydroxysulfates.Environmental science & technology · 2026Article
- Transformation of 2-Line Ferrihydrite to Goethite at Alkaline pH.Environmental science & technology · 2023Article
- Sulfate reduction accelerates groundwater arsenic contamination even in aquifers with abundant iron oxides.Nature water · 2023Article
- Persistent arsenate-iron(iii) oxyhydroxide-organic matter nanoaggregates observed in coal.Environmental science. Nano · 2021Article
- Reduction of iron (hydr)oxide-bound arsenate: Evidence from high depth resolution sampling of a reducing aquifer in Yinchuan Plain, China.Journal of hazardous materials · 2021Article
- Aquifer-Scale Observations of Iron Redox Transformations in Arsenic-Impacted Environments to Predict Future Contamination.Environmental science & technology letters · 2020Article
- Arsenic mobilization from iron oxides in the presence of oxalic acid under hydrodynamic conditions.Chemosphere · 2018Article
- Model-Based Analysis of Arsenic Immobilization via Iron Mineral Transformation under Advective Flows.Environmental science & technology · 2018Article
- Effect of oxalic acid treatment on sediment arsenic concentrations and lability under reducing conditions.Journal of hazardous materials · 2016Article
- Enhanced and stabilized arsenic retention in microcosms through the microbial oxidation of ferrous iron by nitrate.Chemosphere · 2016Article
Corrections and comments
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Authors and funding
6 authors.
Funding
Abstract
The presence of ferrihydrite in sediments/soils is critical to the cycling of iron (Fe) and many other elements but difficult to quantify. Extended X-ray absorption fine structure (EXAFS) spectroscopy has been used to speciate Fe in the solid phase, but this method is thought to have difficulties in distinguishing ferrihydrite from goethite and other minerals. In this study, both conventional EXAFS linear combination fitting (LCF) and the method of standard-additions are applied to the same samples in attempt to quantify ferrihydrite and goethite more rigorously. Natural aquifer sediments from Bangladesh and the United States were spiked with known quantities of ferrihydrite, goethite and magnetite, and analyzed by EXAFS. Known mineral mixtures were also analyzed. Evaluations of EXAFS spectra of mineral references and EXAFS-LCF fits on various samples indicate that ferrihydrite and microcrystalline goethite can be distinguished and quantified by EXAFS-LCF but that the choice of mineral references is critical to yield consistent results. Conventional EXAFS-LCF and the method of standard-additions both identified appreciable amount of ferrihydrite in Bangladesh sediments that were obtained from a low-arsenic Pleistocene aquifer. Ferrihydrite was also independently detected by sequential extraction and
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