TY - JOUR
T1 - Biosorptive removal of Cd and Zn from liquid streams with a Rhodococcus opacus strain
AU - Vásquez, Tatiana Gisset P.
AU - Botero, Ana Elisa C.
AU - de Mesquita, Luciana Maria S.
AU - Torem, Maurício Leonardo
N1 - Funding Information:
The authors acknowledge the financial support by CNPq, CAPES and FAPERJ.
PY - 2007/8
Y1 - 2007/8
N2 - The biosorption abilities of Rhodococcus opacus were studied for cadmium and zinc removal for liquid aqueous streams. The influence of pH, initial metal concentration and time removal were evaluated on the biosorption studies, in a batch scale basis. The Cd2+ and Zn2+ species uptake capacity by R. opacus has been also compared using Langmuir and Freundlich models. At pH 7.0 and 26 °C C, Cd2+ removal achieved a value around 60% from an initial concentration of 15 ppm. On the other hand, Zn removal achieved a value around 88% from an initial concentration of 5 ppm. Kinetics studies revealed that the biosorption process followed a pseudo-second order model for the two metal species (Cd2+ and Zn2+) and the kinetic constants were 3.90 and 3.37 g mg-1 min-1, for an initial concentration of 15 and 5 ppm for cadmium and zinc, respectively. The results showed that the R. opacus is a potential engineering biosorbent for environmental and extractive metallurgy sustainable applications.
AB - The biosorption abilities of Rhodococcus opacus were studied for cadmium and zinc removal for liquid aqueous streams. The influence of pH, initial metal concentration and time removal were evaluated on the biosorption studies, in a batch scale basis. The Cd2+ and Zn2+ species uptake capacity by R. opacus has been also compared using Langmuir and Freundlich models. At pH 7.0 and 26 °C C, Cd2+ removal achieved a value around 60% from an initial concentration of 15 ppm. On the other hand, Zn removal achieved a value around 88% from an initial concentration of 5 ppm. Kinetics studies revealed that the biosorption process followed a pseudo-second order model for the two metal species (Cd2+ and Zn2+) and the kinetic constants were 3.90 and 3.37 g mg-1 min-1, for an initial concentration of 15 and 5 ppm for cadmium and zinc, respectively. The results showed that the R. opacus is a potential engineering biosorbent for environmental and extractive metallurgy sustainable applications.
KW - Adsorption
KW - Biosorption
KW - Cadmium
KW - Rhodococcus opacus
KW - Zinc
UR - http://www.scopus.com/inward/record.url?scp=34447253087&partnerID=8YFLogxK
U2 - 10.1016/j.mineng.2007.03.014
DO - 10.1016/j.mineng.2007.03.014
M3 - Artículo en revista científica indexada
AN - SCOPUS:34447253087
SN - 0892-6875
VL - 20
SP - 939
EP - 944
JO - Minerals Engineering
JF - Minerals Engineering
IS - 9 SPEC. ISS.
ER -