Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Iron and aluminium phases in softwater lakes: identity and significance for copper binding
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering, Environmental Geochemistry and Ecotechnology.
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering, Environmental Geochemistry and Ecotechnology.ORCID iD: 0000-0001-8771-7941
Göteborgs Universitet, Institutionen för Kemi.
SLU.
2009 (English)Conference paper, Published paper (Other academic)
Abstract [en]

Aluminium and iron have been found to compete with copper for binding sites to dissolved organic matter (DOM) in soil systems and when using geochemical modelling. However, the knowledge of the phases of Al, Fe and DOM in natural waters is uncertain. The aim of this ongoing work is to advance the knowledge on the geochemistry of iron and aluminium so that the speciation of copper in lake water can be more accurately assessed. Water samples from three softwater lakes in Tyresta (Stockholm) (Fig. 1),Sweden, are filtered using 0.45 µm and using 1 kDa cross-flow ultrafiltration. The particles on the filters and the colloidal phases of iron are investigated by extended X-ray absorption fine structure (EXAFS) spectroscopy. Aluminium phases are investigated by Fourier transform infrared (FTIR) spectroscopy. Field-flow fractionation (FFF) is used to study the colloidal composition of iron, aluminium and DOM. The competition of Al and Fe with Cu on binding to DOM is explored with Cu titrations using an ion selective electrode. The results will be used to improve geochemical modelling.

 

Preliminary results from EXAFS spectroscopy for an acid lake rich in DOM (Lake Trehörningen; pH 4.8, DOC = 22 mg/l) indicate that Fe is not present as a mineral in the colloids, instead it is bound as monomeric Fe(III) complexes to organic matter, which means that it probably competes with Cu for binding sites on DOM. Additional results will be presented at the conference.

Place, publisher, year, edition, pages
2009.
National Category
Geochemistry
Identifiers
URN: urn:nbn:se:kth:diva-85869OAI: oai:DiVA.org:kth-85869DiVA: diva2:500227
Conference
Biogeomon: 6th International Symposium on Ecosystem Behaviour, BIOGEOMON 2009. Helsinki, Finland. June 29th –July 3rd 2009
Funder
Swedish Research Council, 2007-4468
Note
QC 20120427Available from: 2012-02-13 Created: 2012-02-13 Last updated: 2012-04-27Bibliographically approved

Open Access in DiVA

No full text

Authority records BETA

Gustafsson, Jon Petter

Search in DiVA

By author/editor
Sjöstedt, CarinGustafsson, Jon Petter
By organisation
Environmental Geochemistry and Ecotechnology
Geochemistry

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 26 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf