Dissolution of hydroxide minerals in the 1�M sodium acetate, ph�5, extracting solution in sequential extraction schemes

Hanahan, C.

doi:10.1007/s00254-003-0946-3

Cited by 7 publications

(5 citation statements)

References 16 publications

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“…Claff et al (2010) reported the remains of > 25 % goethite in residual samples even after an 8-hour extraction and concluded that the dithionite extraction could not dissolve high concentrations of crystalline Fe oxides (including akaganéite and haematite). Non-specificity and the postextraction re-adsorption of analytes onto residual solids can also cause variable results depending on the substrate used (Kim et al, 2015;Bacon and Davidson, 2008;Hanahan, 2004). The almost complete removal of synthetic goethite Fe during its target Fe di-ct stage when run as an individual mineral (Table 2), but persistence in the residual CARB-2 mixture (Fig.…”

Section: Sequential Extraction Limitationsmentioning

confidence: 99%

The use of operationally-defined sequential Fe extraction methods for mineralogical applications: A cautionary tale from Mössbauer spectroscopy

et al. 2020

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This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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Section: Sequential Extraction Limitationsmentioning

confidence: 99%

The use of operationally-defined sequential Fe extraction methods for mineralogical applications: A cautionary tale from Mössbauer spectroscopy

et al. 2020

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“…98 In most cases this would be considered impractical. Hanahan 99 found that sodium acetate could also release metals associated with hydroxide minerals. Independent studies of mining wastes 100 and anoxic sediments 101,102 demonstrated that hydroxylamine hydrochloride can dissolve sulfide minerals so sulfide-bound metals could mistakenly be interpreted as being bound to iron oxide species.…”

Section: Scope and Limitations Of Sequential Extractionmentioning

confidence: 99%

“…Fractionation data have clarified the role of microbes in the geochemical cycling of 99 Tc 520 and of fungi in the cycling of 137 Cs; 521,522 the importance of sediments as a sink for 99 Tc 523 and 137 Cs 524 (released from the Sellafield nuclear reprocessing facility, Cumbria, UK); and the factors affecting the migration and fate of 60 Co, 525 137 Cs, 526,527 239/240 Pu 527 and 90 Sr 526 in soil. The approach has been used in assessing the efficiency of a heating method for immobilization of radionuclides in contaminated soil 320 and as part of laboratory-based studies of radionuclide migration in rock fractures 528 relevant to the design of nuclear waste repositories.…”

Section: Mercurymentioning

confidence: 99%

Is there a future for sequential chemical extraction?

Bacon¹,

Davidson

2008

Analyst

561

319

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Since their introduction in the late 1970s, sequential extraction procedures have experienced a rapid increase in use. They are now applied for a large number of potentially toxic elements in a wide range of sample types. This review uses evidence from the literature to consider the usefulness and limitations of sequential extraction and thereby to assess its future role in environmental chemical analysis. It is not the intention to provide a comprehensive survey of all applications of sequential extractions or to consider the merits and disadvantages of individual schemes. These aspects have been covered adequately in other, recent reviews. This review focuses in particular on various key issues surrounding sequential extractions such as nomenclature, methodologies, presentation of data and interpretation of data, and discusses typical applications from the recent literature for which sequential extraction can provide useful and meaningful information. Also covered are emerging developments such as accelerated procedures using ultrasound- or microwave energy-assisted extractions, dynamic extractions, the use of chemometrics, the combination of sequential extraction with isotope analysis, and the extension of the approach to non-traditional analytes such as arsenic, mercury, selenium and radionuclides.

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“…There is lingering debate about the accuracy of various sequential extraction techniques in diagenetically stabilized sedimentary rocks (Praharaj and Fortin, 2004;Raiswell et al, 2011;Reinhard et al, 2009;Reuschel et al, 2012) and even in modern sediments and soil (Bacon and Davidson, 2008;Egger et al, 2014;Hanahan, 2004;Hsieh et al, 2002;La Force and Fendorf, 2000). Our approach in this study is to assume the chemical extractions accurately extract the targeted phases and instead probe a set of questions about the iron speciation proxy arising from changes in chemistry and mineralogy that occur during metamorphism of sedimentary rocks.…”

Section: Sequential Extraction Poolsmentioning

confidence: 99%

The effects of metamorphism on iron mineralogy and the iron speciation redox proxy

Slotznick

Eiler

Fischer

2018

Geochimica et Cosmochimica Acta

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As the most abundant transition metal in the Earth's crust, iron is a key player in the planetary redox budget. Observations of iron minerals in the sedimentary record have been used to describe surface atmospheric and aqueous redox environments over the evolution of our planet; the most common method applied is iron speciation, a geochemical sequential extraction method in which proportions of different iron minerals are compared to calibrations from modern sediments to determine water-column redox state. Less is known about how this proxy records information through post-depositional processes, including diagenesis and metamorphism. To get insight into this, we examined how the iron mineral groups/pools (silicates, oxides, sulfides, etc.) and paleoredox proxy interpretations can be affected by known metamorphic processes. Well known metamorphic reactions occurring in sub-chlorite to kyanite rocks are able to move iron between different iron pools along a range of proxy vectors, potentially affecting paleoredox results. To quantify the effect strength of these reactions, we examined mineralogical and geochemical data from two classic localities where SilurianDevonian shales, sandstones, and carbonates deposited in a marine sedimentary basin with oxygenated seawater (based on global and local biological constraints) have been regionally metamorphosed from lower-greenschist facies to granulite facies: Waits River and Gile Mountain Formations, Vermont, USA and the Waterville and Sangerville-Vassalboro Formations, Maine, USA. Plotting iron speciation ratios determined for samples from these 2 localities revealed apparent paleoredox conditions of the depositional water column spanning the entire range from oxic to ferruginous (anoxic) to euxinic (anoxic and sulfidic). Pyrrhotite formation in samples highlighted problems within the proxy as iron pool assignment required assumptions about metamorphic reactions and pyrrhotite's identification depended on the extraction techniques utilized. The presence of diagenetic iron carbonates in many samples severely affected the proxy even at low grade, engendering an interpretation of ferruginous conditions in all lithologies, but particularly in carbonate-bearing rocks. Increasing metamorphic grades transformed iron in carbonates into iron in silicate minerals, which when combined with a slight increase in the amount of pyrrhotite, drove the proxy toward more oxic and more euxinic conditions. Broad-classes of metamorphic reactions (e.g. decarbonation, silicate formation) occurred at distinct temperatures-pressures in carbonates versus siliciclastics, and could be either abrupt between metamorphic facies or more gradual in nature. Notably, these analyses highlighted the importance of trace iron in phases like calcite, which otherwise might not be included in iron-focused research i.e. ore-system petrogenesis, metamorphic evolution, or normative calculations of mineral abundance. The observations show that iron is mobile and reactive during diagenesis and metamorphism, a...

show abstract

Dissolution of hydroxide minerals in the 1�M sodium acetate, ph�5, extracting solution in sequential extraction schemes

Cited by 7 publications

References 16 publications

The use of operationally-defined sequential Fe extraction methods for mineralogical applications: A cautionary tale from Mössbauer spectroscopy

The use of operationally-defined sequential Fe extraction methods for mineralogical applications: A cautionary tale from Mössbauer spectroscopy

Is there a future for sequential chemical extraction?

The effects of metamorphism on iron mineralogy and the iron speciation redox proxy

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