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.
Кључне речи:
background electrolytes / batch equilibration / chromium(III)-oxide / Point of zero charge
Извор:
Materials Science Forum, 2003, 413, 87-91
Напомена:
4th Yugoslav-Materials-Research-Society Conference, Sep 10-14, 2001, Herceg Novi, Yugoslavia
TY - JOUR
AU - Onjia, Antonije E.
AU - Milonjić, Slobodan K.
PY - 2003
UR - https://vinar.vin.bg.ac.rs/handle/123456789/6348
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.
T2 - Materials Science Forum
T1 - Influence of the background electrolyte on the point of zero charge of chromium(III)-oxide
VL - 413
SP - 87
EP - 91
UR - https://hdl.handle.net/21.15107/rcub_vinar_6348
ER -
@article{
author = "Onjia, Antonije E. 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.",
journal = "Materials Science Forum",
title = "Influence of the background electrolyte on the point of zero charge of chromium(III)-oxide",
volume = "413",
pages = "87-91",
url = "https://hdl.handle.net/21.15107/rcub_vinar_6348"
}
Onjia, A. E.,& Milonjić, S. K.. (2003). Influence of the background electrolyte on the point of zero charge of chromium(III)-oxide. in Materials Science Forum, 413, 87-91.
https://hdl.handle.net/21.15107/rcub_vinar_6348
Onjia AE, Milonjić SK. Influence of the background electrolyte on the point of zero charge of chromium(III)-oxide. in Materials Science Forum. 2003;413:87-91.
https://hdl.handle.net/21.15107/rcub_vinar_6348 .
Onjia, Antonije E., Milonjić, Slobodan K., "Influence of the background electrolyte on the point of zero charge of chromium(III)-oxide" in Materials Science Forum, 413 (2003):87-91,
https://hdl.handle.net/21.15107/rcub_vinar_6348 .
