Webbläsaren som du använder stöds inte av denna webbplats. Alla versioner av Internet Explorer stöds inte längre, av oss eller Microsoft (läs mer här: * https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Var god och använd en modern webbläsare för att ta del av denna webbplats, som t.ex. nyaste versioner av Edge, Chrome, Firefox eller Safari osv.

Per Persson. Foto.

Per Persson

Dekan

Per Persson. Foto.

Potentiometric and spectroscopic studies of sulfate complexation at the goethite-water interface

Författare

  • Per Persson
  • L. Lovgren

Summary, in English

The complexation of sulfate ions at the goethite-water interface has been studied by equilibrium measurements at 298.2 +/- 0.5 K and by infrared spectroscopy. A unified set of data from potentiometric titrations and batch adsorption experiments were evaluated according to an extended Constant Capacitance Model. The obtained equilibrium model consists of two outer-sphere complexes: = FeOH2+, SO42- (log beta(1,1,1(intr)(out)) = 8.3 +/- 0.03) and drop FeOH2+, HSO4- (log beta(2,1,1(intr)(out)) = 13.5 +/- 0.07) and an inner capacitance, C-1, of 4.5 and an outer capacitance, C-2, of 1.8. The outer-sphere model was confirmed by the infrared data and adsorption experiments at different ionic strengths. Furthermore, the infrared measurements provided direct evidence for protonation of the sulfate ions at the interface.

Publiceringsår

1996

Språk

Engelska

Sidor

2789-2799

Publikation/Tidskrift/Serie

Geochimica et Cosmochimica Acta

Volym

60

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Earth and Related Environmental Sciences

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0016-7037