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dc.contributor.authorLorenzen, L.
dc.contributor.authorEksteen, Jacques
dc.contributor.authorPelser, M.
dc.contributor.authorAldrich, Chris
dc.contributor.authorGeorgalli, G.
dc.date.accessioned2017-01-30T10:54:09Z
dc.date.available2017-01-30T10:54:09Z
dc.date.created2015-03-03T03:51:01Z
dc.date.issued2009
dc.date.submitted2015-03-03
dc.identifier.citationLorenzen, L. and Eksteen, J. and Pelser, M. and Aldrich, C. and Georgalli, G. 2009. Activated alumina-based adsorption and recovery of excess fluoride ions subsequent to calcium and magnesium removal in base metal leach circuits. Southern African Institute of Mining and Metallurgy. Journal. 109: pp. 447-453.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/6610
dc.description.abstract

An effective electrowinning process in hydrometallurgical industry requires fluoride levels in the base metal solution to be less than 10 mg/l. Selective removal of the fluoride ions from base solution isthus desired, if fluoride was added to control calcium and magnesium in the circuit. Consequently, adsorption of fluoride onto activated alumina was studied in a batch and a column set-up. Theeffects of base metal solution pH, temperature, initial concentration and flow rate on activated alumina performance were investigated in either a batch or column configuration. A two-level factorialexperimental design was implemented in studying column dynamics. Results demonstrate that activated alumina is an effective adsorbent for selective removal of fluoride from base solution. In the batch operation, fluoride was removed to values below the maximum allowable concentration (10 mg/l) when pH was = 8. In the column adsorption step at 55°C and 600mg/l initial concentration, up to 16 bed volumes were processed before breakthrough level was reached. Desorption step using 1% sodiumhydroxide solution achieved an elution of 8 bed volumes. The activated alumina (AA) had a capacity of 8.65 gF/l AA at the 10 mgF/l fluoride breakthrough level during the column adsorption test.

dc.publisherSouthern African Institute of Mining and Metallurgy
dc.subjectregeneration
dc.subjectFluoride
dc.subjectactivated alumina
dc.subjectadsorption
dc.subjectrecovery
dc.titleActivated alumina-based adsorption and recovery of excess fluoride ions subsequent to calcium and magnesium removal in base metal leach circuits
dc.typeJournal Article
dcterms.dateSubmitted2015-03-03
dcterms.source.volume109
dcterms.source.startPage447
dcterms.source.endPage453
dcterms.source.issn2225-6253
dcterms.source.titleSouthern African Institute of Mining and Metallurgy. Journal
curtin.digitool.pid214217
curtin.pubStatusPublished
curtin.refereedFALSE
curtin.identifier.scriptidPUB-SE-WAS-JL-80643
curtin.accessStatusFulltext not available


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