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...
| Main Authors: | , |
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| Format: | Journal article |
| Language: | English |
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1984
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| _version_ | 1797095658392387584 |
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| author | Compton, R Daly, P |
| author_facet | Compton, R Daly, P |
| author_sort | Compton, R |
| collection | OXFORD |
| 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. |
| first_indexed | 2024-03-07T04:31:00Z |
| format | Journal article |
| id | oxford-uuid:ce50c833-585a-4e0d-9c89-ca453ec7f739 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T04:31:00Z |
| publishDate | 1984 |
| record_format | dspace |
| spelling | oxford-uuid:ce50c833-585a-4e0d-9c89-ca453ec7f7392022-03-27T07:34:48ZTHE DISSOLUTION KINETICS OF ICELAND SPAR SINGLE-CRYSTALSJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:ce50c833-585a-4e0d-9c89-ca453ec7f739EnglishSymplectic Elements at Oxford1984Compton, RDaly, PThe 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. |
| spellingShingle | Compton, R Daly, P THE DISSOLUTION KINETICS OF ICELAND SPAR SINGLE-CRYSTALS |
| title | 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_short | THE DISSOLUTION KINETICS OF ICELAND SPAR SINGLE-CRYSTALS |
| title_sort | dissolution kinetics of iceland spar single crystals |
| work_keys_str_mv | AT comptonr thedissolutionkineticsoficelandsparsinglecrystals AT dalyp thedissolutionkineticsoficelandsparsinglecrystals AT comptonr dissolutionkineticsoficelandsparsinglecrystals AT dalyp dissolutionkineticsoficelandsparsinglecrystals |