The Dissolution of Calcite at pH > 7: Kinetics and Mechanism
A technique is described that allows an assessment of the various candidate rate laws that have been proposed to predict the dissolution kinetics of calcite under high pH conditions. A combination of theoretical modelling and experimentation allows us to choose the following rate law as that which...
| Main Authors: | , |
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| Format: | Journal article |
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1990
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| _version_ | 1797089899864653824 |
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| author | Compton, R Pritchard, K |
| author_facet | Compton, R Pritchard, K |
| author_sort | Compton, R |
| collection | OXFORD |
| description | A technique is described that allows an assessment of the various candidate rate laws that have been proposed to predict the dissolution kinetics of calcite under high pH conditions. A combination of theoretical modelling and experimentation allows us to choose the following rate law as that which best fits the observed data: rate (mol cm$^{-2}$ s$^{-1}$) = k-k$^{\prime}$[Ca$^{2+}$]$_{\text{s}}$[CO$_{3}^{2-}$]$_{\text{s}}$, where k$^{\prime}$ = k/K$_{\text{sp}}$ and K$_{\text{sp}}$ is the solubility product of calcium carbonate. The modelling developed differs from previous studies in that it deals in terms of surface concentrations of reactants, [Ca$^{2+}$]$_{\text{s}}$ and [CO$_{3}^{2-}$], as opposed to those present in bulk solution. |
| first_indexed | 2024-03-07T03:10:40Z |
| format | Journal article |
| id | oxford-uuid:b4160e61-2dc0-4ba3-9a36-da9701278e84 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T03:10:40Z |
| publishDate | 1990 |
| record_format | dspace |
| spelling | oxford-uuid:b4160e61-2dc0-4ba3-9a36-da9701278e842022-03-27T04:23:38ZThe Dissolution of Calcite at pH > 7: Kinetics and MechanismJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:b4160e61-2dc0-4ba3-9a36-da9701278e84Symplectic Elements at Oxford1990Compton, RPritchard, K A technique is described that allows an assessment of the various candidate rate laws that have been proposed to predict the dissolution kinetics of calcite under high pH conditions. A combination of theoretical modelling and experimentation allows us to choose the following rate law as that which best fits the observed data: rate (mol cm$^{-2}$ s$^{-1}$) = k-k$^{\prime}$[Ca$^{2+}$]$_{\text{s}}$[CO$_{3}^{2-}$]$_{\text{s}}$, where k$^{\prime}$ = k/K$_{\text{sp}}$ and K$_{\text{sp}}$ is the solubility product of calcium carbonate. The modelling developed differs from previous studies in that it deals in terms of surface concentrations of reactants, [Ca$^{2+}$]$_{\text{s}}$ and [CO$_{3}^{2-}$], as opposed to those present in bulk solution. |
| spellingShingle | Compton, R Pritchard, K The Dissolution of Calcite at pH > 7: Kinetics and Mechanism |
| title | The Dissolution of Calcite at pH > 7: Kinetics and Mechanism |
| title_full | The Dissolution of Calcite at pH > 7: Kinetics and Mechanism |
| title_fullStr | The Dissolution of Calcite at pH > 7: Kinetics and Mechanism |
| title_full_unstemmed | The Dissolution of Calcite at pH > 7: Kinetics and Mechanism |
| title_short | The Dissolution of Calcite at pH > 7: Kinetics and Mechanism |
| title_sort | dissolution of calcite at ph gt 7 kinetics and mechanism |
| work_keys_str_mv | AT comptonr thedissolutionofcalciteatphgt7kineticsandmechanism AT pritchardk thedissolutionofcalciteatphgt7kineticsandmechanism AT comptonr dissolutionofcalciteatphgt7kineticsandmechanism AT pritchardk dissolutionofcalciteatphgt7kineticsandmechanism |