THE DISSOLUTION KINETICS OF ICELAND SPAR SINGLE-CRYSTALS
The dissolution of Iceland spar has been studied using a rotating disk method. This allows measurements to be made under conditions of well-defined mass transport and with single crystals prepared with surfaces having reproducible characteristics. The dissolution reaction was studied in the pH range...
Published in: | Journal of Colloid and Interface Science |
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Language: | English |
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ftuloxford:oai:ora.ox.ac.uk:uuid:ce50c833-585a-4e0d-9c89-ca453ec7f739 2023-05-15T16:47:25+02:00 THE DISSOLUTION KINETICS OF ICELAND SPAR SINGLE-CRYSTALS Compton, R Daly, P 2016-07-29 https://doi.org/10.1016/0021-9797(84)90016-X https://ora.ox.ac.uk/objects/uuid:ce50c833-585a-4e0d-9c89-ca453ec7f739 eng eng doi:10.1016/0021-9797(84)90016-X https://ora.ox.ac.uk/objects/uuid:ce50c833-585a-4e0d-9c89-ca453ec7f739 https://doi.org/10.1016/0021-9797(84)90016-X info:eu-repo/semantics/embargoedAccess Journal article 2016 ftuloxford https://doi.org/10.1016/0021-9797(84)90016-X 2022-06-28T20:24:16Z The dissolution of Iceland spar has been studied using a rotating disk method. This allows measurements to be made under conditions of well-defined mass transport and with single crystals prepared with surfaces having reproducible characteristics. The dissolution reaction was studied in the pH range 3.0-6.2 and with varying partial pressures of carbon dioxide. In general the flux of dissolving Ca2+ is given by the equation jCa2+/mole cm-2 sec-1 = k1[H+] + k2 + k3[H2CO3], where we find k2 to be 2.1 × 10-9 mole cm-2 sec-1 at 25°C (in citrate buffers) and k1 and k3 are given by the rate of transport of H+ and H2CO3, respectively, to the disk surface. In the presence of weak acids such as acetic acid which can rapidly dissociate on the rotating disk time scale then [H+] should be replaced by [weak acid] in the above equation and the diffusion coefficient used in calculating k1 should be that of the weak acid. © 1984. Article in Journal/Newspaper Iceland ORA - Oxford University Research Archive Journal of Colloid and Interface Science 101 1 159 166 |
institution |
Open Polar |
collection |
ORA - Oxford University Research Archive |
op_collection_id |
ftuloxford |
language |
English |
description |
The dissolution of Iceland spar has been studied using a rotating disk method. This allows measurements to be made under conditions of well-defined mass transport and with single crystals prepared with surfaces having reproducible characteristics. The dissolution reaction was studied in the pH range 3.0-6.2 and with varying partial pressures of carbon dioxide. In general the flux of dissolving Ca2+ is given by the equation jCa2+/mole cm-2 sec-1 = k1[H+] + k2 + k3[H2CO3], where we find k2 to be 2.1 × 10-9 mole cm-2 sec-1 at 25°C (in citrate buffers) and k1 and k3 are given by the rate of transport of H+ and H2CO3, respectively, to the disk surface. In the presence of weak acids such as acetic acid which can rapidly dissociate on the rotating disk time scale then [H+] should be replaced by [weak acid] in the above equation and the diffusion coefficient used in calculating k1 should be that of the weak acid. © 1984. |
format |
Article in Journal/Newspaper |
author |
Compton, R Daly, P |
spellingShingle |
Compton, R Daly, P THE DISSOLUTION KINETICS OF ICELAND SPAR SINGLE-CRYSTALS |
author_facet |
Compton, R Daly, P |
author_sort |
Compton, R |
title |
THE DISSOLUTION KINETICS OF ICELAND SPAR SINGLE-CRYSTALS |
title_short |
THE DISSOLUTION KINETICS OF ICELAND SPAR SINGLE-CRYSTALS |
title_full |
THE DISSOLUTION KINETICS OF ICELAND SPAR SINGLE-CRYSTALS |
title_fullStr |
THE DISSOLUTION KINETICS OF ICELAND SPAR SINGLE-CRYSTALS |
title_full_unstemmed |
THE DISSOLUTION KINETICS OF ICELAND SPAR SINGLE-CRYSTALS |
title_sort |
dissolution kinetics of iceland spar single-crystals |
publishDate |
2016 |
url |
https://doi.org/10.1016/0021-9797(84)90016-X https://ora.ox.ac.uk/objects/uuid:ce50c833-585a-4e0d-9c89-ca453ec7f739 |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
doi:10.1016/0021-9797(84)90016-X https://ora.ox.ac.uk/objects/uuid:ce50c833-585a-4e0d-9c89-ca453ec7f739 https://doi.org/10.1016/0021-9797(84)90016-X |
op_rights |
info:eu-repo/semantics/embargoedAccess |
op_doi |
https://doi.org/10.1016/0021-9797(84)90016-X |
container_title |
Journal of Colloid and Interface Science |
container_volume |
101 |
container_issue |
1 |
container_start_page |
159 |
op_container_end_page |
166 |
_version_ |
1766037500896215040 |