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The impact of fluoride on Al abundance and speciation in boreal streams

Berger, Tobias and Mathurin, Frederic A. and Gustafsson, Jon-Petter and Peltola, Pasi and Åström, Mats E. (2015). The impact of fluoride on Al abundance and speciation in boreal streams. Chemical Geology. 409, 118-124
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Official URL: http://dx.doi.org/10.1016/j.chemgeo.2015.05.013

Abstract

The impact of fluoride on the abundance and speciation of aluminium (Al) was investigated in three boreal streams characterised by overall high concentrations of fluoride and dissolved organic matter. Stream-water sampling was carried out several times a year for at least 4 years, and a chemical equilibrium model (Visual MINTEQ) was applied in order to model the proportion of colloidal and organically/inorganically complexed Al in the waters. The Al concentrations in filtered (0.45 mu m) water samples were inversely correlated with pH, and reached values up to approximately 1 mg/L during low pH conditions (pH < 6.0). In a stream with high fluoride concentrations, as compared to a similar stream with only moderately elevated fluoride concentrations, the Al concentrations were consistently elevated. For the stream with high concentrations of fluoride and Al, the model predicted both high concentrations and proportions of Al-fluoride complexation. This prediction indicates that high fluoride levels contribute to raise both the Al abundance and the ratio of inorganic to organic Al complexation in stream water. In contrast, for another stream with high fluoride concentrations and consistently high (near neutral) pH, there was no evidence of fluoride affecting Al concentration or complexation. These results show that it is important to focus future studies on the role of high levels of dissolved fluoride on both the speciation and the toxicity of Al in stream water. (C) 2015 Elsevier B.V. All rights reserved.

Authors/Creators:Berger, Tobias and Mathurin, Frederic A. and Gustafsson, Jon-Petter and Peltola, Pasi and Åström, Mats E.
Title:The impact of fluoride on Al abundance and speciation in boreal streams
Series/Journal:Chemical Geology (0009-2541)
Year of publishing :2015
Depositing date:28 August 2015
Volume:409
Page range:118-124
Number of Pages:7
Publisher:Elsevier
ISSN:0009-2541
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Accepted version
Full Text Status:Public
Agris subject categories.:P Natural resources > P33 Soil chemistry and physics
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Geophysics
(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Geochemistry
Agrovoc terms:fluorides, aluminium, toxicity
Keywords:Aluminium, Fluoride, Al speciation, Boreal catchments, Chemical modelling, Al toxicity
URN:NBN:urn:nbn:se:slu:epsilon-e-2877
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-2877
Additional ID:
Type of IDID
Web of Science (WoS)000358525500012
DOI10.1016/j.chemgeo.2015.05.013
ID Code:12547
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment
Deposited By: SLUpub Connector
Deposited On:05 Nov 2015 07:16
Metadata Last Modified:19 Feb 2016 15:36

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