The geochemical control of birnessite on selenium fate and transport at environmental concentrations
This study investigated the geochemical controls on selenium mobility by two forms of birnessite mineral, focusing on the influence of pH, concentration, and the presence of cations. The research aimed to understand the dominant reaction mechanism (redox vs. sorption) under environmentally relevant...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2025-02-01
|
| Series: | Frontiers in Environmental Chemistry |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fenvc.2025.1527112/full |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1823860559974498304 |
|---|---|
| author | Ilana B. Szlamkowicz Giovanna B. Ribeiro Anna T. Nguyen Vasileios A. Anagnostopoulos |
| author_facet | Ilana B. Szlamkowicz Giovanna B. Ribeiro Anna T. Nguyen Vasileios A. Anagnostopoulos |
| author_sort | Ilana B. Szlamkowicz |
| collection | DOAJ |
| description | This study investigated the geochemical controls on selenium mobility by two forms of birnessite mineral, focusing on the influence of pH, concentration, and the presence of cations. The research aimed to understand the dominant reaction mechanism (redox vs. sorption) under environmentally relevant selenium concentrations. Experiments were conducted to study the interaction of selenium with the birnessite minerals under varying conditions. The results demonstrated a significant shift in the dominant reaction mechanism from slow redox reactions observed at artificially elevated selenium concentrations to fast sorption processes at environmentally relevant concentrations, with second order rates increasing from 7.63 x 10-7 to 0.0224 L mol-1 h-1, respectively. This finding highlights the crucial role of selenium concentration in determining its interaction with birnessite minerals and emphasizes the importance of conducting research under realistic conditions to accurately predict selenium mobility and develop effective remediation strategies. |
| format | Article |
| id | doaj-art-3847fb8e587f4c86b90e59e2a8407aa6 |
| institution | Kabale University |
| issn | 2673-4486 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Environmental Chemistry |
| spelling | doaj-art-3847fb8e587f4c86b90e59e2a8407aa62025-02-10T12:22:42ZengFrontiers Media S.A.Frontiers in Environmental Chemistry2673-44862025-02-01610.3389/fenvc.2025.15271121527112The geochemical control of birnessite on selenium fate and transport at environmental concentrationsIlana B. SzlamkowiczGiovanna B. RibeiroAnna T. NguyenVasileios A. AnagnostopoulosThis study investigated the geochemical controls on selenium mobility by two forms of birnessite mineral, focusing on the influence of pH, concentration, and the presence of cations. The research aimed to understand the dominant reaction mechanism (redox vs. sorption) under environmentally relevant selenium concentrations. Experiments were conducted to study the interaction of selenium with the birnessite minerals under varying conditions. The results demonstrated a significant shift in the dominant reaction mechanism from slow redox reactions observed at artificially elevated selenium concentrations to fast sorption processes at environmentally relevant concentrations, with second order rates increasing from 7.63 x 10-7 to 0.0224 L mol-1 h-1, respectively. This finding highlights the crucial role of selenium concentration in determining its interaction with birnessite minerals and emphasizes the importance of conducting research under realistic conditions to accurately predict selenium mobility and develop effective remediation strategies.https://www.frontiersin.org/articles/10.3389/fenvc.2025.1527112/fullmanganese oxidebirnessiteseleniumselenitesorptionoxidation |
| spellingShingle | Ilana B. Szlamkowicz Giovanna B. Ribeiro Anna T. Nguyen Vasileios A. Anagnostopoulos The geochemical control of birnessite on selenium fate and transport at environmental concentrations Frontiers in Environmental Chemistry manganese oxide birnessite selenium selenite sorption oxidation |
| title | The geochemical control of birnessite on selenium fate and transport at environmental concentrations |
| title_full | The geochemical control of birnessite on selenium fate and transport at environmental concentrations |
| title_fullStr | The geochemical control of birnessite on selenium fate and transport at environmental concentrations |
| title_full_unstemmed | The geochemical control of birnessite on selenium fate and transport at environmental concentrations |
| title_short | The geochemical control of birnessite on selenium fate and transport at environmental concentrations |
| title_sort | geochemical control of birnessite on selenium fate and transport at environmental concentrations |
| topic | manganese oxide birnessite selenium selenite sorption oxidation |
| url | https://www.frontiersin.org/articles/10.3389/fenvc.2025.1527112/full |
| work_keys_str_mv | AT ilanabszlamkowicz thegeochemicalcontrolofbirnessiteonseleniumfateandtransportatenvironmentalconcentrations AT giovannabribeiro thegeochemicalcontrolofbirnessiteonseleniumfateandtransportatenvironmentalconcentrations AT annatnguyen thegeochemicalcontrolofbirnessiteonseleniumfateandtransportatenvironmentalconcentrations AT vasileiosaanagnostopoulos thegeochemicalcontrolofbirnessiteonseleniumfateandtransportatenvironmentalconcentrations AT ilanabszlamkowicz geochemicalcontrolofbirnessiteonseleniumfateandtransportatenvironmentalconcentrations AT giovannabribeiro geochemicalcontrolofbirnessiteonseleniumfateandtransportatenvironmentalconcentrations AT annatnguyen geochemicalcontrolofbirnessiteonseleniumfateandtransportatenvironmentalconcentrations AT vasileiosaanagnostopoulos geochemicalcontrolofbirnessiteonseleniumfateandtransportatenvironmentalconcentrations |