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Vanadium in soils

chemistry and ecotoxicity

Larsson, Maja A. (2014). Vanadium in soils. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2014:102
ISBN 978-91-576-8152-2
eISBN 978-91-576-8153-9
[Doctoral thesis]

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Abstract

Vanadium is a redox-sensitive metal that is released to soils by weathering and anthropogenic emissions. Swedish metallurgical slags are naturally high in vanadium and used as soil amendments and in road materials. However, understanding of vanadium chemistry and bioavailability in soils is limited. The aim of this thesis was to provide knowledge of vanadium in soils in terms of sorption, toxicity and speciation, in order to enable improved environmental risk assessments. Vanadium sorption to ferrihydrite was evaluated in batch experiments. Toxicity assays using microorganisms and plants were conducted to measure vanadium toxicity in different vanadium soil treatments; freshly spiked, aged and blast furnace slag (800 mg V kg⁻¹). Vanadium speciation in a podzolic soil amended with converter lime (14.6 g V kg⁻¹) 26 years previously was assessed by using XANES spectroscopy and HPLC-ICP-MS.

Ferrihydrite adsorbed vanadium strongly, but adsorption was reduced by large additions of phosphate. EXAFS spectroscopy revealed that a vanadate(V) edge-sharing bidentate complex formed on the ferrihydrite surface. In the toxicity assays, increasing vanadium sorption strength in the freshly spiked soils reduced the toxicity. Toxicity was also reduced by soil ageing, possibly because of vanadium incorporation into metal (hydr)oxides. No toxicity was observed when soils were amended with up to 29% blast furnace slag, probably owing to the low solubility of vanadium in slag. The variation in toxicity between soils and vanadium treatments was due to differences in bioavailability of vanadium which was explained by the vanadium concentration in soil solution. The vanadium added with converter lime was in pentavalent form, but the main fraction of the vanadium recovered from the mor layer sorbed to organic matter as vanadium(IV). In the mineral soil layers, the added vanadium sorbed to metal (hydr)oxides as vanadium(V). The most toxic vanadium form, vanadium(V), dominated in the soil solution but the concentrations were below toxic levels.

In conclusion, vanadium toxicity varies between soils and treatments and is most accurately described by the vanadium concentration in the soil solution. Vanadium speciation in soil is mainly controlled by soil properties, and not by the vanadium species added to the soil.

Authors/Creators:Larsson, Maja A.
Title:Vanadium in soils
Subtitle:chemistry and ecotoxicity
Series/Journal:Acta Universitatis agriculturae Sueciae (1652-6880)
Year of publishing :2014
Depositing date:17 November 2014
Volume:2014:102
Number of Pages:60
Papers/manuscripts:
NumberReferences
I.Larsson, M.A., Persson, I., Sjöstedt, C. & Gustafsson, J.P. (2014). Vanadate complexation to ferrihydrite: X-ray absorption spectroscopy and CD-MUSIC modelling. (manuscript).
II.Larsson, M.A., Baken, S., Gustafsson J.P., Hadialhejazi, G. & Smolders, E. (2013). Vanadium bioavailability and toxicity to soil microorganisms and plants. Environmental Toxicology and Chemistry 32 (10), 2266-2273.
III.Baken, S., Larsson M.A., Gustafsson, J.P., Cubadda, F. & Smolders E. (2012). Ageing of vanadium in soils and consequences for bioavailability. European Journal of Soil Science 63 (6), 839-847.
IV.Larsson, M.A., Baken, S., Smolders E., Cubadda F. & Gustafsson, J.P. (2014). Vanadium bioavailability in soils amended with blast furnace slag. (Submitted manuscript).
V.Larsson, M.A., D'Amato, M., Cubadda, F., Raggi, A., Öborn, I., Berggren Kleja, D. & Gustafsson, J.P. (2014). Long-term fate and transformations of vanadium added by converter lime to a forest soil. (submitted manuscript).
Place of Publication:Uppsala
Publisher:Department of Soil and Environment, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-576-8152-2
ISBN for electronic version:978-91-576-8153-9
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:P Natural resources > P33 Soil chemistry and physics
T Pollution > T01 Pollution
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Geochemistry
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Soil Science
Agrovoc terms:vanadium, slags, soil, soil chemistry, sorption, ecotoxicity, bioavailability, soil amendments, x ray spectroscopy, hplc, mass spectrometry, field experimentation, pot experimentation, sweden
Keywords:vanadium, soil, ferrihydrite, sorption, toxicity, bioavailability, speciation, XANES spectroscopy, HPLC-ICP-MS
URN:NBN:urn:nbn:se:slu:epsilon-e-2223
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-2223
ID Code:11653
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment
Deposited By: Maja A. Larsson
Deposited On:17 Nov 2014 14:09
Metadata Last Modified:02 Dec 2014 11:09

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