The Point of zero charge of chromium(Ill)-oxide (pH(pzc)) was investigated by a batch equilibration method. The effect of several background electrolytes, in the concentration range of 10(-5)-10(-1) mol/dm(3), on pH(pzc) was established. In the absence of ionic species with specific affinity toward chromium(III)-oxide surface, the pH(pzc) for this material occurs at pH=6.7. KCl was found to behave as an indifferent electrolyte in the studied range of concentrations. A negligible increase in pH(pzc) due to the sorption of [Fe(CN)(6)](3-) ions was observed when K-3[Fe(CN)(6)] was used as an electrolyte. The presence of oxygen bearing electrolytes (KNO3, NaNO3, and K2SO4) shifts the pH(pzc) toward lower values. In the case of highly hydrolyzable cation Cd2+, the pH(pzc) decreases even more and the buffering effect of chromium(Ill)-oxide is changed.
Keywords:
background electrolytes / batch equilibration / chromium(III)-oxide / Point of zero charge
Source:
Contemporary Studies in Advanced Materials and Processes: Yucomat IV, 2003, 413, 87-91
TY - JOUR
AU - Onjia, Antonije
AU - Milonjić, Slobodan K.
PY - 2003
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/558
AB - The Point of zero charge of chromium(Ill)-oxide (pH(pzc)) was investigated by a batch equilibration method. The effect of several background electrolytes, in the concentration range of 10(-5)-10(-1) mol/dm(3), on pH(pzc) was established. In the absence of ionic species with specific affinity toward chromium(III)-oxide surface, the pH(pzc) for this material occurs at pH=6.7. KCl was found to behave as an indifferent electrolyte in the studied range of concentrations. A negligible increase in pH(pzc) due to the sorption of [Fe(CN)(6)](3-) ions was observed when K-3[Fe(CN)(6)] was used as an electrolyte. The presence of oxygen bearing electrolytes (KNO3, NaNO3, and K2SO4) shifts the pH(pzc) toward lower values. In the case of highly hydrolyzable cation Cd2+, the pH(pzc) decreases even more and the buffering effect of chromium(Ill)-oxide is changed.
PB - Trans Tech Publications Ltd, Durnten-Zurich
T2 - Contemporary Studies in Advanced Materials and Processes: Yucomat IV
T1 - Influence of the background electrolyte on the point of zero charge of chromium(III)-oxide
EP - 91
SP - 87
VL - 413
UR - https://hdl.handle.net/21.15107/rcub_vinar_6348
ER -
@article{
author = "Onjia, Antonije and Milonjić, Slobodan K.",
year = "2003",
abstract = "The Point of zero charge of chromium(Ill)-oxide (pH(pzc)) was investigated by a batch equilibration method. The effect of several background electrolytes, in the concentration range of 10(-5)-10(-1) mol/dm(3), on pH(pzc) was established. In the absence of ionic species with specific affinity toward chromium(III)-oxide surface, the pH(pzc) for this material occurs at pH=6.7. KCl was found to behave as an indifferent electrolyte in the studied range of concentrations. A negligible increase in pH(pzc) due to the sorption of [Fe(CN)(6)](3-) ions was observed when K-3[Fe(CN)(6)] was used as an electrolyte. The presence of oxygen bearing electrolytes (KNO3, NaNO3, and K2SO4) shifts the pH(pzc) toward lower values. In the case of highly hydrolyzable cation Cd2+, the pH(pzc) decreases even more and the buffering effect of chromium(Ill)-oxide is changed.",
publisher = "Trans Tech Publications Ltd, Durnten-Zurich",
journal = "Contemporary Studies in Advanced Materials and Processes: Yucomat IV",
title = "Influence of the background electrolyte on the point of zero charge of chromium(III)-oxide",
pages = "91-87",
volume = "413",
url = "https://hdl.handle.net/21.15107/rcub_vinar_6348"
}
Onjia, A.,& Milonjić, S. K.. (2003). Influence of the background electrolyte on the point of zero charge of chromium(III)-oxide. in Contemporary Studies in Advanced Materials and Processes: Yucomat IV
Trans Tech Publications Ltd, Durnten-Zurich., 413, 87-91.
https://hdl.handle.net/21.15107/rcub_vinar_6348
Onjia A, Milonjić SK. Influence of the background electrolyte on the point of zero charge of chromium(III)-oxide. in Contemporary Studies in Advanced Materials and Processes: Yucomat IV. 2003;413:87-91.
https://hdl.handle.net/21.15107/rcub_vinar_6348 .
Onjia, Antonije, Milonjić, Slobodan K., "Influence of the background electrolyte on the point of zero charge of chromium(III)-oxide" in Contemporary Studies in Advanced Materials and Processes: Yucomat IV, 413 (2003):87-91,
https://hdl.handle.net/21.15107/rcub_vinar_6348 .
