Larsson, Maja and Hadialhejazi, Golshid and Gustafsson, Jon-Petter
(2017).
Vanadium sorption by mineral soils: Development of a predictive model.
Chemosphere. 168
, 925-932
[Research article]
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- Accepted Version
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Official URL: http://dx.doi.org/10.1016/j.chemosphere.2016.10.11...
Abstract
The toxicity of vanadium in soils depends on its sorption to soil components. Here we studied the vanadate(V) sorption properties of 26 mineral soils. The data were used to optimise parameters for a Freundlich equation with a pH term. Vanadium Kedge XANES spectroscopy for three selected soils confirmed that the added vanadate(V) had accumulated mostly as adsorbed vanadate(V) on Fe and Al hydrous oxides, with only minor contributions from organically complexed vanadium(IV). Data on pH dependent V solubility for seven soils showed that on average 0.36 H+ accompanied each V during adsorption and desorption. The resulting model provided reasonable fits to the V sorption data, with r(2) > 0.99 for 20 of 26 soils. The observed Kds value, i.e. the ratio of total to dissolved V, was strongly dependent on V addition and soil; it varied between 3 and 4 orders of magnitude. The model was used to calculate the Freundlich sorption strength (FSS), i.e. the amount of V sorbed at [V] = 2.5 mg L-1, in the concentration range of observed plant toxicities. A close relationship between FSS and oxalate extractable Fe and Al was found (r(2) = 0.85) when one acidic soil was removed from the regression. The FSS varied between 27 and 8718 mg V kg(-1), showing that the current environmental guidelines can be both under- and overprotective for vanadium.
Authors/Creators: | Larsson, Maja and Hadialhejazi, Golshid and Gustafsson, Jon-Petter | ||||
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Title: | Vanadium sorption by mineral soils: Development of a predictive model | ||||
Series Name/Journal: | Chemosphere | ||||
Year of publishing : | 2017 | ||||
Volume: | 168 | ||||
Page range: | 925-932 | ||||
Number of Pages: | 8 | ||||
Publisher: | Elsevier | ||||
ISSN: | 0045-6535 | ||||
Language: | English | ||||
Publication Type: | Research article | ||||
Refereed: | Yes | ||||
Article category: | Scientific peer reviewed | ||||
Version: | Accepted version | ||||
Full Text Status: | Public | ||||
Agris subject categories.: | P Natural resources > P30 Soil science and management | ||||
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 | ||||
Keywords: | Vanadate, Freundlich, Hydrous oxides, pH dependence, Speciation | ||||
URN:NBN: | urn:nbn:se:slu:epsilon-e-4361 | ||||
Permanent URL: | http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-4361 | ||||
Additional ID: |
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ID Code: | 14522 | ||||
Faculty: | NJ - Fakulteten för naturresurser och jordbruksvetenskap S - Faculty of Forest Sciences | ||||
Department: | (NL, NJ) > Dept. of Soil and Environment (S) > Dept. of Soil and Environment | ||||
Deposited By: | SLUpub Connector | ||||
Deposited On: | 18 Sep 2017 06:40 | ||||
Metadata Last Modified: | 02 Nov 2018 00:15 |
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