Cl/Br and δ37Cl evolution in seawater expelled during the compaction of MX-80 smectite
During a high pressure (up to 150 MPa) high temperature (up to 150°C) compaction experiment of MX-80 smectite equilibrated with ocean water, it was found that the Cl and Br concentrations in the expelled solution are progressively being decreased while simultaneously being increased in the compacted...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2019-01-01
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| Series: | E3S Web of Conferences |
| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/24/e3sconf_wri-162018_12022.pdf |
| _version_ | 1818558307503177728 |
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| author | Strydom Jessica Eggenkamp Hans Sterpenich Jérôme Agrinier Pierre Richard Antonin Grgic Dragan Gaire Patrick Mosser-Ruck Régine Gaucher Eric C. |
| author_facet | Strydom Jessica Eggenkamp Hans Sterpenich Jérôme Agrinier Pierre Richard Antonin Grgic Dragan Gaire Patrick Mosser-Ruck Régine Gaucher Eric C. |
| author_sort | Strydom Jessica |
| collection | DOAJ |
| description | During a high pressure (up to 150 MPa) high temperature (up to 150°C) compaction experiment of MX-80 smectite equilibrated with ocean water, it was found that the Cl and Br concentrations in the expelled solution are progressively being decreased while simultaneously being increased in the compacted clay. This significant retention of Cl and Br in the pore water of the compacted clay is indicative of ultrafiltration by the clay. Despite the size difference between the two anions no significant chemical partitioning between Cl and Br is observed in the expelled water. The δ37Cl value of the expelled water shows a sharp decrease (from -0.1 ‰ down to -0.5‰) during the first steps of compactions (between 45MPa – 21°C and 65MPa – 30°C) and then remains stable until 125MPa – 120°C. The largest impact on anion and stable isotope composition is seen during the earlier phases of the compaction. It is supposed that the surface chemistry of the clay in combination with decreasing porosity result in re-equilibration of compressed and overlapping diffuse double layers which in part, drive the anion and δ37Cl evolution. |
| first_indexed | 2024-12-14T00:10:55Z |
| format | Article |
| id | doaj.art-ea3a27b0be9a4476965961cc144bcdfa |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-12-14T00:10:55Z |
| publishDate | 2019-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-ea3a27b0be9a4476965961cc144bcdfa2022-12-21T23:25:45ZengEDP SciencesE3S Web of Conferences2267-12422019-01-01981202210.1051/e3sconf/20199812022e3sconf_wri-162018_12022Cl/Br and δ37Cl evolution in seawater expelled during the compaction of MX-80 smectiteStrydom Jessica0Eggenkamp Hans1Sterpenich Jérôme2Agrinier Pierre3Richard Antonin4Grgic Dragan5Gaire Patrick6Mosser-Ruck Régine7Gaucher Eric C.8Université de Lorraine, CREGUInstitut de Physique du Globe de ParisUniversité de Lorraine, CREGUInstitut de Physique du Globe de ParisUniversité de Lorraine, CREGUUniversité de Lorraine, CREGUUniversité de Lorraine, CREGUUniversité de Lorraine, CREGUTotal CSTJFDuring a high pressure (up to 150 MPa) high temperature (up to 150°C) compaction experiment of MX-80 smectite equilibrated with ocean water, it was found that the Cl and Br concentrations in the expelled solution are progressively being decreased while simultaneously being increased in the compacted clay. This significant retention of Cl and Br in the pore water of the compacted clay is indicative of ultrafiltration by the clay. Despite the size difference between the two anions no significant chemical partitioning between Cl and Br is observed in the expelled water. The δ37Cl value of the expelled water shows a sharp decrease (from -0.1 ‰ down to -0.5‰) during the first steps of compactions (between 45MPa – 21°C and 65MPa – 30°C) and then remains stable until 125MPa – 120°C. The largest impact on anion and stable isotope composition is seen during the earlier phases of the compaction. It is supposed that the surface chemistry of the clay in combination with decreasing porosity result in re-equilibration of compressed and overlapping diffuse double layers which in part, drive the anion and δ37Cl evolution.https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/24/e3sconf_wri-162018_12022.pdf |
| spellingShingle | Strydom Jessica Eggenkamp Hans Sterpenich Jérôme Agrinier Pierre Richard Antonin Grgic Dragan Gaire Patrick Mosser-Ruck Régine Gaucher Eric C. Cl/Br and δ37Cl evolution in seawater expelled during the compaction of MX-80 smectite E3S Web of Conferences |
| title | Cl/Br and δ37Cl evolution in seawater expelled during the compaction of MX-80 smectite |
| title_full | Cl/Br and δ37Cl evolution in seawater expelled during the compaction of MX-80 smectite |
| title_fullStr | Cl/Br and δ37Cl evolution in seawater expelled during the compaction of MX-80 smectite |
| title_full_unstemmed | Cl/Br and δ37Cl evolution in seawater expelled during the compaction of MX-80 smectite |
| title_short | Cl/Br and δ37Cl evolution in seawater expelled during the compaction of MX-80 smectite |
| title_sort | cl br and δ37cl evolution in seawater expelled during the compaction of mx 80 smectite |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/24/e3sconf_wri-162018_12022.pdf |
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