Influence of pH and citrate on the formation of oxalate layers on calcite revealed by in situ nanoscale imaging
The influence of pH and citrate concentration on the replacement of calcite by calcium oxalate has been investigated by in situ nanoscale observations in flow-through experiments performed using atomic force microscopy (AFM). Significant changes in the morphology of the precipitated whewellite (CaC...
| Main Authors: | , , , |
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| Format: | Journal Article |
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The Royal Society of Chemistry
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/54903 |
| _version_ | 1848759492592795648 |
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| author | Burgos-Cara, A. Putnis, Christine Ortega-Huertas, M. Ruiz-Agudo, E. |
| author_facet | Burgos-Cara, A. Putnis, Christine Ortega-Huertas, M. Ruiz-Agudo, E. |
| author_sort | Burgos-Cara, A. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The influence of pH and citrate concentration on the replacement of calcite by calcium oxalate has been investigated by in situ nanoscale observations in flow-through experiments performed using atomic force microscopy (AFM). Significant changes in the morphology of the precipitated whewellite (CaC 2 O 4 ·H 2 O) crystals were observed, as well as in the degree of interface coupling of the dissolution-precipitation reactions, depending on the pH of the solution. Citrate also influences whewellite morphology; different citrate species seem to preferentially adsorb on different whewellite faces according to our experimental observations. The results of this study may help in the design of effective treatments for the protection of calcareous stone, based on the natural process of patina formation that occurs in monuments, as well as to better understand the process of unwanted oxalate precipitate formation and its control by small organic molecules such as citrate. |
| first_indexed | 2025-11-14T10:00:45Z |
| format | Journal Article |
| id | curtin-20.500.11937-54903 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:00:45Z |
| publishDate | 2017 |
| publisher | The Royal Society of Chemistry |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-549032017-09-18T08:11:02Z Influence of pH and citrate on the formation of oxalate layers on calcite revealed by in situ nanoscale imaging Burgos-Cara, A. Putnis, Christine Ortega-Huertas, M. Ruiz-Agudo, E. The influence of pH and citrate concentration on the replacement of calcite by calcium oxalate has been investigated by in situ nanoscale observations in flow-through experiments performed using atomic force microscopy (AFM). Significant changes in the morphology of the precipitated whewellite (CaC 2 O 4 ·H 2 O) crystals were observed, as well as in the degree of interface coupling of the dissolution-precipitation reactions, depending on the pH of the solution. Citrate also influences whewellite morphology; different citrate species seem to preferentially adsorb on different whewellite faces according to our experimental observations. The results of this study may help in the design of effective treatments for the protection of calcareous stone, based on the natural process of patina formation that occurs in monuments, as well as to better understand the process of unwanted oxalate precipitate formation and its control by small organic molecules such as citrate. 2017 Journal Article http://hdl.handle.net/20.500.11937/54903 10.1039/c7ce00305f The Royal Society of Chemistry restricted |
| spellingShingle | Burgos-Cara, A. Putnis, Christine Ortega-Huertas, M. Ruiz-Agudo, E. Influence of pH and citrate on the formation of oxalate layers on calcite revealed by in situ nanoscale imaging |
| title | Influence of pH and citrate on the formation of oxalate layers on calcite revealed by in situ nanoscale imaging |
| title_full | Influence of pH and citrate on the formation of oxalate layers on calcite revealed by in situ nanoscale imaging |
| title_fullStr | Influence of pH and citrate on the formation of oxalate layers on calcite revealed by in situ nanoscale imaging |
| title_full_unstemmed | Influence of pH and citrate on the formation of oxalate layers on calcite revealed by in situ nanoscale imaging |
| title_short | Influence of pH and citrate on the formation of oxalate layers on calcite revealed by in situ nanoscale imaging |
| title_sort | influence of ph and citrate on the formation of oxalate layers on calcite revealed by in situ nanoscale imaging |
| url | http://hdl.handle.net/20.500.11937/54903 |