Mineralogical evolution of glauconite and smectite in a peat bog environment: Results of a one-year natural experiment; Applied Clay Science; Vol. 285
| Parent link: | Applied Clay Science.— .— Amsterdam: Elsevier Science Publishing Company Inc. Vol. 285.— 2026.— Article number 108146, 10 p. |
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| Diğer Yazarlar: | , , , , |
| Özet: | Title screen This study examines the crystal-chemical and sorption transformations of glauconite and smectite during prolonged exposure in a peat bog environment, as part of a natural experiment conducted in the oligotrophic zone of the Vasyugan Mire (Western Siberia). The Vasyugan Mire was selected as a natural acidic and organic-rich sedimentary system that promotes ion exchange and low-temperature mineral transformations, representing an analogue of early diagenetic conditions. Samples were incubated in situ at 25, 50, and 75 cm depths for one year. Recovered samples underwent comprehensive physicochemical characterization using X-ray diffraction (XRD), scanning electron microscopy with energy-dispersive spectroscopy (SEM-EDS), Fourier-transform infrared (FTIR) spectroscopy, thermogravimetric analysis, differential scanning calorimetry, and mass spectrometry (TG-DSC-MS). Glauconite underwent significant structural changes, including: (1) loss of interlayer K+, (2) relative depletion of Fe-associated components, and (3) absorption of organic compounds and NH4+ ions. These transformations were more pronounced in the reducing conditions of deeper soil layers. XRD and chemical data show trends that may be consistent with an initial expansion of interlayers and a possible early-stage development of smectite-like features. Smectite maintained a stable crystal structure but exhibited significant ion exchange activity and sorption of inorganic substances (including CO2, NH3/NH4+) and low-molecular-weight organic acids within its interlayer region. Its charge balance is modified by the incorporation of ammonium and organic species within the interlayer, which mask deeper structural transformations. The distinct buffering mechanisms arise from fundamental structural differences: glauconite buffers via crystallochemical rearrangement, whereas smectite uses its expandable interlayer and high cation exchange capacity. The results demonstrate that peat bogs play a role as natural geochemical reactors, accelerating the early diagenetic processes of clay mineral transformation. This highlights the potential of glauconite and smectite as effective buffering and sorbent materials in environmentally friendly technologies such as barrier screens and water purification systems Текстовый файл AM_Agreement |
| Dil: | İngilizce |
| Baskı/Yayın Bilgisi: |
2026
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| Konular: | |
| Online Erişim: | https://doi.org/10.1016/j.clay.2026.108146 |
| Materyal Türü: | Elektronik Kitap Bölümü |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=684900 |
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| 200 | 1 | |a Mineralogical evolution of glauconite and smectite in a peat bog environment: Results of a one-year natural experiment |f M. Rudmin, H. Bu, O. Savichev [et al.] | |
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| 330 | |a This study examines the crystal-chemical and sorption transformations of glauconite and smectite during prolonged exposure in a peat bog environment, as part of a natural experiment conducted in the oligotrophic zone of the Vasyugan Mire (Western Siberia). The Vasyugan Mire was selected as a natural acidic and organic-rich sedimentary system that promotes ion exchange and low-temperature mineral transformations, representing an analogue of early diagenetic conditions. Samples were incubated in situ at 25, 50, and 75 cm depths for one year. Recovered samples underwent comprehensive physicochemical characterization using X-ray diffraction (XRD), scanning electron microscopy with energy-dispersive spectroscopy (SEM-EDS), Fourier-transform infrared (FTIR) spectroscopy, thermogravimetric analysis, differential scanning calorimetry, and mass spectrometry (TG-DSC-MS). Glauconite underwent significant structural changes, including: (1) loss of interlayer K+, (2) relative depletion of Fe-associated components, and (3) absorption of organic compounds and NH4+ ions. These transformations were more pronounced in the reducing conditions of deeper soil layers. XRD and chemical data show trends that may be consistent with an initial expansion of interlayers and a possible early-stage development of smectite-like features. Smectite maintained a stable crystal structure but exhibited significant ion exchange activity and sorption of inorganic substances (including CO2, NH3/NH4+) and low-molecular-weight organic acids within its interlayer region. Its charge balance is modified by the incorporation of ammonium and organic species within the interlayer, which mask deeper structural transformations. The distinct buffering mechanisms arise from fundamental structural differences: glauconite buffers via crystallochemical rearrangement, whereas smectite uses its expandable interlayer and high cation exchange capacity. The results demonstrate that peat bogs play a role as natural geochemical reactors, accelerating the early diagenetic processes of clay mineral transformation. This highlights the potential of glauconite and smectite as effective buffering and sorbent materials in environmentally friendly technologies such as barrier screens and water purification systems | ||
| 336 | |a Текстовый файл | ||
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| 461 | 1 | |t Applied Clay Science |c Amsterdam |n Elsevier Science Publishing Company Inc. | |
| 463 | 1 | |t Vol. 285 |v Article number 108146, 10 p. |d 2026 | |
| 610 | 1 | |a Clay minerals | |
| 610 | 1 | |a Peat bog | |
| 610 | 1 | |a Glauconite | |
| 610 | 1 | |a Smectite | |
| 610 | 1 | |a Evolution | |
| 610 | 1 | |a Vasyugan Mire | |
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 701 | 1 | |a Rudmin |b M. A. |c geologist |c Associate Professor of Tomsk Polytechnic University, Candidate of Geological and Mineralogical Sciences |f 1989- |g Maksim Andreevich |9 16999 | |
| 701 | 0 | |a Bu Hongling | |
| 701 | 1 | |a Savichev |b O. G. |c geologist |c Professor of Tomsk Polytechnic University, doctor of geographical sciences |f 1967- |g Oleg Gennadievich |9 17591 | |
| 701 | 1 | |a Khitrin |b I. S. |g Ivan Sergeevich |f 2002- |c geologist |c engineer of Tomsk Polytechnic University |9 89103 | |
| 701 | 1 | |a Ruban |b A. S. |c geologist |c engineer of Tomsk Polytechnic University |f 1991- |g Aleksey Sergeevich |9 17590 | |
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