Home About Browse Search
Svenska


Vanadium sorption by mineral soils: Development of a predictive model

Larsson, Maja and Hadialhejazi, Golshid and Gustafsson, Jon-Petter (2017). Vanadium sorption by mineral soils: Development of a predictive model. Chemosphere. 168, 925-932
[Journal article]

[img] PDF - Accepted Version
Restricted to Repository staff only until 2 November 2018.

454kB

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
Title:Vanadium sorption by mineral soils: Development of a predictive model
Series/Journal:Chemosphere (0045-6535)
Year of publishing :2017
Volume:168
Page range:925-932
Number of Pages:8
Publisher:Elsevier
ISSN:0045-6535
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Accepted version
Full Text Status:Restricted
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:
Type of IDID
Web of Science (WoS)000400879900009
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:18 Sep 2017 06:40

Repository Staff Only: item control page

Downloads

Downloads per year (since September 2012)

View more statistics

Downloads
Hits