Different strategies for recovering metals from CARON process residue

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Different strategies for recovering metals from CARON process residue

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dc.contributor.author Cabrera Revuelta, Gema
dc.contributor.author Gómez Montes de Oca, José Manuel
dc.contributor.author Hernández, Ianeya
dc.contributor.author Cantero, Domingo
dc.contributor.author Coto, Orquidea
dc.contributor.other Ingeniería Química y Tecnología de Alimentos en_US
dc.date.accessioned 2014-05-23T07:58:08Z
dc.date.available 2014-05-23T07:58:08Z
dc.date.issued 2011-01-01T00:00:00Z
dc.identifier.issn 0304-3894
dc.identifier.uri http://hdl.handle.net/10498/16308
dc.description http://dx.doi.org/10.1016/j.jhazmat.2011.03.048 en_US
dc.description.abstract The capacity of Acidithiobacillus thiooxidans DMS 11478 to recover the heavy metals contained in the residue obtained from the CARON process has been evaluated. Different bioreactor configurations were studied: a two-stage batch system and two semi-continuous systems (stirred-tank reactor leaching and column leaching). In the two-stage system, 46.8% Co, 36.0% Mg, 26.3% Mn and 22.3% Ni were solubilised after 6 h of contact between the residue and the bacteria-free bioacid. The results obtained with the stirred-tank reactor and the column were similar: 50% of the Mg and Co and 40% of the Mn and Ni were solubilised after thirty one days. The operation in the column reactor allowed the solid–liquid ratio to be increased and the pH to be kept at low values (<1.0). Recirculation of the leachate in the column had a positive effect on metal removal; at sixty five days (optimum time) the solubilisation levels were as follows: 86% Co, 83% Mg, 72% Mn and Ni, 62% Fe and 23% Cr. The results corroborate the feasibility of the systems studied for the leaching of metals from CARON process residue and these methodologies can be considered viable for the recovery of valuable metals. en_US
dc.format application/pdf
dc.language.iso eng en_US
dc.publisher Elsevier en_US
dc.rights info:eu-repo/semantics/openAccess
dc.source Journal of Hazardous Materials - 2011 - Volume 189, n. 3 pp. 836–842 en_US
dc.subject Acidithiobacillus thiooxidans en_US
dc.subject Heavy metals en_US
dc.subject CARON process residue en_US
dc.subject Leaching en_US
dc.title Different strategies for recovering metals from CARON process residue en_US
dc.type info:eu-repo/semantics/article en_US
dc.rights.accessRights info:eu-repo/semantics/openAccess
dc.identifier.doi 10.1016/j.jhazmat.2011.03.048

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