Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Jarosite inclusion of fluoride and its potential significance to bioleaching of sulphide minerals
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Industriell miljö- och processteknik.
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Industriell miljö- och processteknik.
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Industriell miljö- och processteknik.ORCID-id: 0000-0001-9794-8305
Laboratory of Nuclear Chemistry, Institute of Chemistry, Eötvös Loránd University.
Vise andre og tillknytning
2009 (engelsk)Inngår i: Hydrometallurgy, ISSN 0304-386X, E-ISSN 1879-1158, Vol. 96, nr 1-2, s. 108-116Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Incorporation of fluoride ions into the structure of jarosite, a common precipitate in bioleaching, was studied. Crystalline jarosite was synthesized in the presence of various concentrations of fluoride ions and characterized by spectroscopic- and chemical analysis.The results showed that substantial amounts of fluoride were sorbed to jarosite, increasing with pH and fluoride concentration. FTIR, XRD and Mössbauer analysis supported a structural incorporation of the fluoride. Due to the size similarity between fluoride and hydroxide ions, a probable mechanism is an exchange of hydroxide ions and fluoride ions within the jarosite, giving the composition KFe3(SO4)2(OH)6 - xFx(s). For the maximum concentration of fluoride used during synthesis, 200 mM, about 25% of the hydroxide ions were exchanged for fluoride ions. The mass of jarosite precipitated shown to be highly dependent on the fluoride concentration, with approximately half the yield using 200 mM potassium fluoride compared to in the absence of fluoride ions.To test the influence on toxicity of the incorporation of fluoride in jarosite, a bioleaching study was performed at 65 °C. A suspension of pyrite concentrate with 4% solid content (w/v) in the modified 9 K medium was bioleached under additions of potassium fluoride. The results indicated a higher tolerance for fluoride ions, as compared to earlier reported studies on fluoride toxicity during bioleaching.

sted, utgiver, år, opplag, sider
2009. Vol. 96, nr 1-2, s. 108-116
HSV kategori
Forskningsprogram
Gränsytors kemi; Processmetallurgi; Fysikalisk kemi
Identifikatorer
URN: urn:nbn:se:ltu:diva-10018DOI: 10.1016/j.hydromet.2008.08.012ISI: 000262876100017Scopus ID: 2-s2.0-58149203407Lokal ID: 8c4e1240-bc82-11dd-a7c4-000ea68e967bOAI: oai:DiVA.org:ltu-10018DiVA, id: diva2:982958
Merknad

Validerad; 2009; 20081127 (lagu)

Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2020-06-10bibliografisk kontrollert

Open Access i DiVA

Fulltekst mangler i DiVA

Andre lenker

Forlagets fulltekstScopus

Person

Gunneriusson, LarsSandström, ÅkeHolmgren, Allan

Søk i DiVA

Av forfatter/redaktør
Gunneriusson, LarsSandström, ÅkeHolmgren, Allan
Av organisasjonen
I samme tidsskrift
Hydrometallurgy

Søk utenfor DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric

doi
urn-nbn
Totalt: 375 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf