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Vanadium bioavailability in soils amended with blast furnace slag [Elektronisk resurs]

Larsson, M. A. (författare)
Baken, S. (författare)
Smolders, E. (författare)
Cubadda, F. (författare)
Gustafsson, Jon Petter (författare)
KTH Skolan för arkitektur och samhällsbyggnad (ABE) (utgivare)
Publicerad: 2015
Engelska.
Ingår i: Journal of Hazardous Materials. - 0304-3894. ; 296, 158-165
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  • E-artikel/E-kapitel
Sammanfattning Ämnesord
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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 800mgVkg-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. 

Ämnesord

Natural Sciences  (hsv)
Earth and Related Environmental Sciences  (hsv)
Environmental Sciences  (hsv)
Naturvetenskap  (hsv)
Geovetenskap och miljövetenskap  (hsv)
Miljövetenskap  (hsv)

Indexterm och SAB-rubrik

Bioavailability
Blast furnace slag
Phytotoxicity
Soil
Speciation
Vanadium
Assays
Biochemistry
Risk assessment
Slags
Soil moisture
Soils
X ray absorption near edge structure spectroscopy
Environmental risk assessment
Soil solutions
Toxic thresholds
Vanadium concentration
Vanadium species
Blast furnaces
vanadic acid
bioassay
dissolution
growth rate
pollution control
slag
soil pollution
alkalinity
Article
barley
biomass
concentration (parameters)
controlled study
furnace
grain
high performance liquid chromatography
high temperature
leaching
nonhuman
oxidation reduction potential
oxidation reduction reaction
plant growth
shoot growth
soil acidity
species differentiation
surface property
toxicity assay
toxicity testing
Sweden
Hordeum
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