Thermodynamics and kinetics of reactions involving vanadium in natural systems: Accumulation of vanadium in sedimentary rocks

Wanty, Richard B.; Goldhaber, Martin B.

doi:10.1016/0016-7037(92)90217-7

Cited by 331 publications

(208 citation statements)

References 42 publications

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“…In soils, only vanadium in the oxidation states +4 and +5 are expected to be leached [17]. As shown in the sorption experiments, vanadium(V) dominated in the soil extracts.…”

Section: Vanadium Concentrations and Speciation In Slags And Soilsmentioning

confidence: 83%

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Vanadium bioavailability in soils amended with blast furnace slag

Larsson

Baken

Smolders

et al. 2015

Journal of Hazardous Materials

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Blast furnace (BF) slags are commonly applied as soil amendments and in road fill material. In Sweden they are also naturally high in vanadium. The aim of this study was to assess the vanadium bioavailability in BF slags when applied to soil. Two soils were amended with up to 29 % BF slag (containing 800 mg V kg -1 ) and equilibrated outdoors for 10 months before conducting a barley shoot growth assay. Additional soil samples were spiked with dissolved vanadate(V) for which assays were conducted two weeks (freshly spiked) and 10 months (aged) after spiking. The BF slag vanadium was dominated by vanadium(III) as shown by V K-edge XANES spectroscopy. In contrast, results obtained by HPLC-ICP-MS showed that vanadium(V), the most toxic vanadium species, was predominant in the soil solution. Barley shoot growth was not affected by the BF slag additions. This was likely due to limited dissolution of vanadium from the BF slag, preventing an increase of dissolved vanadium above toxic thresholds. The difference in vanadium bioavailability among treatments was explained by the vanadium concentration in the soil solution. It was concluded that the vanadium in BF slag is sparingly available. These findings should be of importance in environmental risk assessment.

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“…In soils, only vanadium in the oxidation states +4 and +5 are expected to be leached [17]. As shown in the sorption experiments, vanadium(V) dominated in the soil extracts.…”

Section: Vanadium Concentrations and Speciation In Slags And Soilsmentioning

confidence: 83%

“…The pH value also affects vanadium speciation. Vanadium is a redox-sensitive element that can exist in several different oxidation states, of which +4 and +5 are the most soluble ones in the environment [17]. Vanadium(IV) is an oxocation stable at low pH and is readily complexed to humic substances [18].…”

Section: Introductionmentioning

confidence: 99%

Vanadium bioavailability in soils amended with blast furnace slag

Larsson

Baken

Smolders

et al. 2015

Journal of Hazardous Materials

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“…Vanadium is likely to be in the measurable form H 2 VO − 4 in the pH range 5-9 and the E h (redox potential) range 0-1 V. [9] Reduction of V V to V IV can occur with organic materials as electron donors, [10,11] with reduction to V III requiring a stronger reductant. V III is rapidly hydrolysed in aqueous solution, resulting in the precipitation of relatively insoluble V III oxyhydroxides.…”

Section: Introductionmentioning

confidence: 99%

“…V III is rapidly hydrolysed in aqueous solution, resulting in the precipitation of relatively insoluble V III oxyhydroxides. [9] Sulfide can reduce V IV to V III , but when studied under laboratory conditions, the reaction was slow at natural sulfide concentrations. [9] However, the authors considered that effects such as surface catalysis may increase reaction rates under natural conditions.…”

Section: Introductionmentioning

confidence: 99%

High-resolution two-dimensional quantitative analysis of phosphorus, vanadium and arsenic, and qualitative analysis of sulfide, in a freshwater sediment

2008

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Environmental context. Chemical characterisation of sediment microniches can reveal diagenetic processes that may not be detected by larger-scale analysis. With the development of a new preparation method for a binding phase gel, the technique of diffusive gradients in thin films has been used to demonstrate links between the diagenesis of sulfide, phosphorus, vanadium and arsenic at microniches. Knowledge of these processes may improve predictions of past deposition climates where trace elements are considered as paleoredox proxies. Abstract.Recently introduced techniques that can provide two-dimensional images of solution concentrations in sediments for multiple analytes have revealed discrete sites of geochemical behaviour different from the average for that depth (microniches). We have developed a new preparation method for a binding phase, incorporated in a hydrogel, for the diffusive gradients in thin films (DGT) technique. It allows co-analysis of sulfide and the reactive forms of phosphorus, vanadium and arsenic in the porewaters at the surface of the device. This gel, when dried and analysed using laser ablation mass spectrometry, allows the acquisition of high-resolution sub-millimetre-scale data. The binding phase was deployed within a DGT device in a sediment core collected from a productive lake, Esthwaite Water (UK). Localised removal of phosphate and vanadium from the porewaters has been demonstrated at a microniche of local sulfide production. The possible removal processes, including bacterial uptake and reduction of vanadate to insoluble V III by sulfide, are discussed. Understanding processes occurring at this scale may allow improved prediction of pollutant fate and better prediction of past climates where trace metals are used as paleoredox proxies.

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“…We assumed that the concentration of V in this solution was about 5 ppm. This assumption is based upon a content of about 5 times the V concentrations typical of natural waters, which means generally less than 1.2 ppm (Wanty & Goldhaber 1992, and references therein). 2+ and Cr 3+ at 300 K and 1 atm for formation of dickite.…”

Section: Conditions Of Formation Of Dickite: Eh-ph Diagramsmentioning

confidence: 99%

Geochemistry and electron spin resonance of hydrothermal dickite (Nowa Ruda, Lower Silesia, Poland): vanadium and chromium

Premović¹,

Ciesielczuk²,

Bzowska³

et al. 2012

Geologica Carpathica

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Geochemical analyses for trace V and Cr have been done on a representative sample of a typical hydrothermal dickite/kaolinite filling vein at Nowa Ruda. The mineralogy of the sample is comparatively simple, dickite being the principal component (ca. 91 % of the total sample). Geochemical fractionation and inductively coupled plasma-optical emission spectrometry (ICP-OES) indicate that most ( > 90 % of total metal) of the V and Cr reside in the dickite. Electron Spin Resonance (ESR) shows that most ( > 70 %) of the V in the dickite structure is in the form of vanadyl (VO 2+ ) ions. A high concentration of Cr 3+ is also detected in this structure by ESR. The combination of geochemical and spectroscopic tools applied to VO 2+ and Cr 3+ allow one to specify the Eh ( > 0.4 V, highly oxidizing) and pH ( 4.0, highly acidic) of the solution during the formation of dickite from the Nowa Ruda Basin. Substantial proportions of the V and Cr (as well as VO 2+ and Cr 3+ ) in the dickite structure were probably contained in an original hydrothermal acid water. We suggest that hot hydrothermal waters leached the surrounding varieties of gabbroids enriched in V and Cr for the dickite-forming solution. The results of this work have shown V and Cr are potentially reliable indicators for geochemical characterization of the physicochemical conditions of their formation. The bulk-rock V/Cr ratio in hydrothermal dickites and kaolinites from Nowa Ruda, Sonoma (California, USA), Cigar Lake (Saskatchewan, Canada) and Teslić (Bosnia and Hercegovina) is also briefly explored here as a potential tracer of redox state during their formation.

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Thermodynamics and kinetics of reactions involving vanadium in natural systems: Accumulation of vanadium in sedimentary rocks

Cited by 331 publications

References 42 publications

Vanadium bioavailability in soils amended with blast furnace slag

Vanadium bioavailability in soils amended with blast furnace slag

High-resolution two-dimensional quantitative analysis of phosphorus, vanadium and arsenic, and qualitative analysis of sulfide, in a freshwater sediment

Geochemistry and electron spin resonance of hydrothermal dickite (Nowa Ruda, Lower Silesia, Poland): vanadium and chromium

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