TY - JOUR
T1 - Surface chemistry fundamentals of biosorption of Rhodococcus opacus and its effect in calcite and magnesite flotation
AU - Botero, Ana Elisa C.
AU - Torem, Maurício Leonardo
AU - de Mesquita, Luciana Maria S.
N1 - Funding Information:
The authors acknowledge Professor José Farias de Oliveira, UFRJ and Professor Maria Isabel Paes da Silva, PUC-Rio for their support on the FTIR and contact angle experiments and CNPq, CAPES and FAPERJ for the financial support.
PY - 2008/1
Y1 - 2008/1
N2 - The affinity of Rhodococcus opacus cells for calcite and magnesite surfaces has been studied in order to evaluate its application as a flotation collector. The surface properties of minerals and R. opacus were characterized using infrared techniques. The mineral spectrums, before and after the bacterial interaction, indicated a mineral surface interaction with the R. opacus cell wall. The results were compared with the zeta potential curves as a function of the pH. The cell wall composition of R. opacus was characterized and the R. opacus hydrophobicity was either evaluated with contact angle measurements. The interfacial tension components were calculated based on the van Oss and Fowkes equations. The obtained results were supported by DLVO and X-DLVO theories for selected pH values. The results show the paramount innovation that R. opacus presents as a biocollector and its possible application in the mineral flotation industry.
AB - The affinity of Rhodococcus opacus cells for calcite and magnesite surfaces has been studied in order to evaluate its application as a flotation collector. The surface properties of minerals and R. opacus were characterized using infrared techniques. The mineral spectrums, before and after the bacterial interaction, indicated a mineral surface interaction with the R. opacus cell wall. The results were compared with the zeta potential curves as a function of the pH. The cell wall composition of R. opacus was characterized and the R. opacus hydrophobicity was either evaluated with contact angle measurements. The interfacial tension components were calculated based on the van Oss and Fowkes equations. The obtained results were supported by DLVO and X-DLVO theories for selected pH values. The results show the paramount innovation that R. opacus presents as a biocollector and its possible application in the mineral flotation industry.
KW - Adsorption
KW - Bioflotation
KW - DLVO and X-DLVO theory
KW - Industrial minerals
KW - Rhodococcus opacus
UR - http://www.scopus.com/inward/record.url?scp=36549065766&partnerID=8YFLogxK
U2 - 10.1016/j.mineng.2007.08.019
DO - 10.1016/j.mineng.2007.08.019
M3 - Artículo en revista científica indexada
AN - SCOPUS:36549065766
SN - 0892-6875
VL - 21
SP - 83
EP - 92
JO - Minerals Engineering
JF - Minerals Engineering
IS - 1
ER -