Vanadium(V) adsorption onto goethite (α-FeOOH) at pH 1.5 to 12: a surface complexation model based on ab initio molecular geometries and EXAFS spectroscopy

Peacock, Caroline L.; Sherman, David M.

doi:10.1016/j.gca.2003.10.018

Cited by 242 publications

(178 citation statements)

References 45 publications

Supporting

Mentioning

157

Contrasting

Unclassified

Order By: Relevance

“…From clay-like substances, as well as on goethite, V---M + distances were determined of ~3 Å for adsorbed vanadium species, which is in the range with the distances observed for our catalyst samples. [44][45][46] Wehrli et al have shown on alumina and titania that the adsorption of vanadium oxide species is fairly strong and probably takes place via an inner-sphere type mechanism. [47,48] Extrapolating this idea to the other support oxides, the V---M + distances suggest an adsorption mechanism similar to the one on alumina for niobia and zirconia as well.…”

Section: Structural Consequences Upon Hydration: Influence Of the Netmentioning

confidence: 99%

Elucidation of the molecular structure of hydrated vanadium oxide species by X-ray absorption spectroscopy: correlation between the V⋯V coordination number and distance and the point of zero charge of the support oxide

Keller

Koningsberger

Weckhuysen

2006

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

The effect of the point of zero charge (PZC) of the support oxide (Al 2 O 3 , Nb 2 O 5 , SiO 2 and ZrO 2 ) on the molecular structure of hydrated vanadium oxide species has been investigated with EXAFS spectroscopy for low-loaded vanadium oxide catalysts. It was found that the degree of clustering (i.e., the V---V coordination number) and the V---V distance increase with decreasing PZC of the support oxide;i.e., Al 2 O 3 (8.7) < ZrO 2 (7) < Nb 2 O 5 (3.3) < SiO 2 (2). Upon hydration the silicasupported vanadium oxide exhibited a clear alteration in the position of the oxygen atoms surrounding the central vanadium atom and thenumber of oxygen atoms around vanadium increased to five. In contrast, only minor changes in the molecular structure were detected for the alumina-, niobia-and zirconia-supported vanadium oxide catalysts. Based on a detailed analysis of the EXAFS data a semi-quantitative distribution of vanadium oxide species present on the surface of the different support oxides can be obtained, which is in good agreement with earlier characterization studies making primarily use of Raman spectroscopy.

show abstract

Section: Structural Consequences Upon Hydration: Influence Of the Netmentioning

confidence: 99%

Elucidation of the molecular structure of hydrated vanadium oxide species by X-ray absorption spectroscopy: correlation between the V⋯V coordination number and distance and the point of zero charge of the support oxide

Keller

Koningsberger

Weckhuysen

2006

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

show abstract

“…Pentavalent vanadate may be stable above pH 3.6 and sorbs as an oxyanion to iron (hydr)oxides, e.g. goethite [19]. Vanadate(V) is the most commonly occurring redox species in soils and also the most toxic [20,21].…”

Section: Introductionmentioning

confidence: 99%

Vanadium bioavailability in soils amended with blast furnace slag

Larsson

Baken

Smolders

et al. 2015

Journal of Hazardous Materials

View full text Add to dashboard Cite

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.

show abstract

“…If there had been a considerable leaching of vanadium from the mor layer, 308 higher concentrations would have been expected in the 0-20 cm mineral soil which was high in 309 oxalate-extractable iron and aluminum. The importance of metal (hydr)oxides, especially those 310 containing iron, for vanadium retention has been consistently highlighted (Blackmore et al, 1996;311 Gäbler et al, 2009;Naeem et al, 2007;Peacock and Sherman, 2004). Consequently, a major loss of 312 vanadium from this layer is not probable.…”

Section: Vanadium Distribution and Speciation In Soil 289mentioning

confidence: 99%

“…However, the spectra from the 10-20 cm layer was rather noisy and the R-336 factors were all rather similar, hence it is uncertain how important the aluminium (hydr)oxides were 337 for vanadium sorption in this layer. The importance of vanadate(V) sorption in soils has been shown 338 before (Burke et al, 2013;Peacock and Sherman, 2004). The involvement of iron (hydr)oxides in 339 vanadium sorption in soils is well known but so far less evidence is available concerning the 340 importance of aluminum (hydr)oxides or similar compounds (e.g.…”

Section: Vanadium Distribution and Speciation In Soil 289mentioning

confidence: 99%

Long-term fate and transformations of vanadium in a pine forest soil with added converter lime

et al. 2015

View full text Add to dashboard Cite

24A field-trial with different application rates of converter lime (0.2, 0.7 and 1.0 kg m -2 ) was set up 25 in a pine forest stand in southern Sweden in 1984. The lime contained 14.6 g kg -1 vanadium. The aim 26 with this study was to evaluate the vanadium concentration and speciation in the soil 26 years after 27 application. Samples of the organic mor layer and the mineral soil were analysed separately. The 28 vanadium concentration decreased with soil depth, from 680 to 8 mg kg -1 soil. Analysis by vanadium 29 K-edge XANES spectroscopy showed that vanadium(IV) was the predominant species in the mor 30 layer. Further, iron and/or aluminium (hydr)oxides were important sorbents for vanadium(V) in the 31 mineral soil. The speciation of dissolved vanadium, as determined by HPLC-ICP-MS, was dominated 32 by vanadium(V), which is considered the most toxic vanadium species. However, the vanadium 33 sorption capacity of the soil was sufficient to reduce the total bioavailable vanadium below phytotoxic 34 levels. By combining two different vanadium speciation methods, this study was able to conclude that 35 vanadium speciation in soils is governed by soil properties such as pH. organic matter content and the 36 content of metal (hydr)oxides, but not by the vanadium species added to the soil. 37

show abstract

Vanadium(V) adsorption onto goethite (α-FeOOH) at pH 1.5 to 12: a surface complexation model based on ab initio molecular geometries and EXAFS spectroscopy

Cited by 242 publications

References 45 publications

Elucidation of the molecular structure of hydrated vanadium oxide species by X-ray absorption spectroscopy: correlation between the V⋯V coordination number and distance and the point of zero charge of the support oxide

Elucidation of the molecular structure of hydrated vanadium oxide species by X-ray absorption spectroscopy: correlation between the V⋯V coordination number and distance and the point of zero charge of the support oxide

Vanadium bioavailability in soils amended with blast furnace slag

Long-term fate and transformations of vanadium in a pine forest soil with added converter lime

Contact Info

Product

Resources

About