RT journal article
T1 Different strategies for recovering metals from CARON process residue
A1 Cabrera Revuelta, Gema
A1 Gómez Montes de Oca, José Manuel
A1 Hernández, Ianeya
A1 Cantero Moreno, Domingo
A1 Coto, Orquidea
A2 Ingeniería Química y Tecnología de Alimentos
K1 Acidithiobacillus thiooxidans
K1 Heavy metals
K1 CARON process residue
K1 Leaching
AB The capacity of Acidithiobacillus thiooxidans DMS 11478 to recover the heavy metals contained inthe residue obtained from the CARON process has been evaluated. Different bioreactor configurationswere studied: a two-stage batch system and two semi-continuous systems (stirred-tank reactorleaching and column leaching). In the two-stage system, 46.8% Co, 36.0% Mg, 26.3% Mn and 22.3% Niwere solubilised after 6 h of contact between the residue and the bacteria-free bioacid. The resultsobtained with the stirred-tank reactor and the column were similar: 50% of the Mg and Co and40% of the Mn and Ni were solubilised after thirty one days. The operation in the column reactorallowed the solid–liquid ratio to be increased and the pH to be kept at low values (<1.0). Recirculationof 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 and23% Cr. The results corroborate the feasibility of the systems studied for the leaching of metals fromCARON process residue and these methodologies can be considered viable for the recovery of valuablemetals.
PB Elsevier
SN 0304-3894
YR 2011
FD 2011-01-01T00:00:00Z
LK http://hdl.handle.net/10498/16308
UL http://hdl.handle.net/10498/16308
LA eng
NO http://dx.doi.org/10.1016/j.jhazmat.2011.03.048
DS Repositorio Institucional de la Universidad de Cádiz
RD 07-nov-2026