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
Chromium(III) complexation to natural organic matter: Mechanisms and modeling
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Land and Water Resources Engineering.ORCID iD: 0000-0001-8771-7941
Show others and affiliations
2014 (English)In: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 48, no 3, 1753-1761 p.Article in journal (Refereed) Published
Abstract [en]

Chromium is a common soil contaminant, and it often exists as chromium(III). However, limited information exists on the coordination chemistry and stability of chromium(III) complexes with natural organic matter (NOM). Here, the complexation of chromium(III) to mor layer material and to Suwannee River Fulvic Acid (SRFA) was investigated using EXAFS spectroscopy and batch experiments. The EXAFS results showed a predominance of monomeric chromium(III)-NOM complexes at low pH (<5), in which only Cr··C and Cr-O-C interactions were observed in the second coordination shell. At pH > 5 there were polynuclear chromium(III)-NOM complexes with Cr···Cr interactions at 2.98 Å and for SRFA also at 3.57 Å, indicating the presence of dimers (soil) and tetramers (SRFA). The complexation of chromium(III) to NOM was intermediate between that of iron(III) and aluminum(III). Chromium(III) complexation was slow at pH < 4: three months or longer were required to reach equilibrium. The results were used to constrain chromium-NOM complexation in the Stockholm Humic Model (SHM): a monomeric complex dominated at pH < 5, whereas a dimeric complex dominated at higher pH. The optimized constant for the monomeric chromium(III) complex was in between those of the iron(III) and aluminum(III) NOM complexes. Our study suggests that chromium(III)-NOM complexes are important for chromium speciation in many environments.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2014. Vol. 48, no 3, 1753-1761 p.
Keyword [en]
X-Ray Absorption Spectroscopy, Humic Substances, Ion Binding, Exafs Spectroscopy, Condensed Matter, Proton-Binding, Cation-Binding, Soils, Metal
National Category
Environmental Sciences
Identifiers
URN: urn:nbn:se:kth:diva-142807DOI: 10.1021/es404557eISI: 000331015100049Scopus ID: 2-s2.0-84893606291OAI: oai:DiVA.org:kth-142807DiVA: diva2:704735
Funder
Knut and Alice Wallenberg FoundationSwedish Research Council
Note

QC 20140313

Available from: 2014-03-13 Created: 2014-03-12 Last updated: 2017-12-05Bibliographically approved

Open Access in DiVA

fulltext(929 kB)317 downloads
File information
File name FULLTEXT01.pdfFile size 929 kBChecksum SHA-512
bf4156d750546827466bcc1e2ab2e36d8d6fa5b3444bbcff3d09f7af9c71c9c480ff03ab6d32b26af0fd0293e586fcd6591666b2bae32259b1a8b99a43d1b3d1
Type fulltextMimetype application/pdf

Other links

Publisher's full textScopus

Authority records BETA

Gustafsson, Jon Petter

Search in DiVA

By author/editor
Gustafsson, Jon PetterSjöstedt, Carin
By organisation
Land and Water Resources EngineeringChemistry
In the same journal
Environmental Science and Technology
Environmental Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 317 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 200 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