Vanadium bioavailability in soils amended with blast furnace slag
2015 (English)In: Journal of Hazardous Materials, ISSN 0304-3894, E-ISSN 1873-3336, Vol. 296, 158-165 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2015. Vol. 296, 158-165 p.
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
IdentifiersURN: urn:nbn:se:kth:diva-167683DOI: 10.1016/j.jhazmat.2015.04.034ScopusID: 2-s2.0-84928226656OAI: oai:DiVA.org:kth-167683DiVA: diva2:816124
QC 201506022015-06-022015-05-222015-07-21Bibliographically approved