Iron reduction and changes in cation exchange capacity in intermittently waterlogged soil
Identifieur interne : 001206 ( Istex/Curation ); précédent : 001205; suivant : 001207Iron reduction and changes in cation exchange capacity in intermittently waterlogged soil
Auteurs : F. Favre [France, Suisse] ; D. Tessier ; M. Abdelmoula [France] ; J. M. Génin [France] ; W. P. Gates [Australie] ; P. Boivin [France, Suisse]Source :
- European Journal of Soil Science [ 1351-0754 ] ; 2002-06.
Descripteurs français
- Wicri :
- topic : Oxyde, Science des sols.
English descriptors
- KwdEn :
- America journal, Apox, Biological reduction, Blackwell science, Cation, Cation exchange capacity, Chemical analyses, Chemical analysis, Clay minerals, Clay surfaces, Cmol, Cmolc, Complete dissolution, Crop cycle, Different times, Dioctahedral smectites, European journal, Feii, Feiii, Field conditions, Gley formation, Goethite, Goethite coatings, Hyperfine field, Hyperfine parameters, Iapox, Initial state, Iron oxides, Iron reduction, Irrigation scheme, Isomer shift, Large amount, Layer charge, Microbial reduction, Mossbauer, Mossbauer data, Mossbauer spectra, Mossbauer spectroscopy, Neighbouring, Neighbouring land, Octahedral, Octahedral feii, Octahedral feiii, Octahedral sites, Organic matter, Oxidation state, Oxide, Oxide coatings, Oxidized, Oxidized sample, Oxidized samples, Oxidized soil, Oxidized soil samples, Oxyhydroxide, Oxyhydroxide coatings, Physical properties, Positive charge, Quadrupole splitting, Rainy season, Redox, Redox processes, Reductive dissolution, Relative area, Relative percentages, Rice crop, Rice field, Rice production, Room temperature, Roth, Sample iapox, Samples apox, Scanning electron microscopy, Smectite, Smectites, Soil reduction, Soil samples, Soil science, Soil science society, Spatial variation, Structural iron, Stucki, Test mineral, Test minerals, Test vermiculite, Vermiculite, Vermiculite surfaces, Weathering effect.
- Teeft :
- America journal, Apox, Biological reduction, Blackwell science, Cation, Cation exchange capacity, Chemical analyses, Chemical analysis, Clay minerals, Clay surfaces, Cmol, Cmolc, Complete dissolution, Crop cycle, Different times, Dioctahedral smectites, European journal, Feii, Feiii, Field conditions, Gley formation, Goethite, Goethite coatings, Hyperfine field, Hyperfine parameters, Iapox, Initial state, Iron oxides, Iron reduction, Irrigation scheme, Isomer shift, Large amount, Layer charge, Microbial reduction, Mossbauer, Mossbauer data, Mossbauer spectra, Mossbauer spectroscopy, Neighbouring, Neighbouring land, Octahedral, Octahedral feii, Octahedral feiii, Octahedral sites, Organic matter, Oxidation state, Oxide, Oxide coatings, Oxidized, Oxidized sample, Oxidized samples, Oxidized soil, Oxidized soil samples, Oxyhydroxide, Oxyhydroxide coatings, Physical properties, Positive charge, Quadrupole splitting, Rainy season, Redox, Redox processes, Reductive dissolution, Relative area, Relative percentages, Rice crop, Rice field, Rice production, Room temperature, Roth, Sample iapox, Samples apox, Scanning electron microscopy, Smectite, Smectites, Soil reduction, Soil samples, Soil science, Soil science society, Spatial variation, Structural iron, Stucki, Test mineral, Test minerals, Test vermiculite, Vermiculite, Vermiculite surfaces, Weathering effect.
Abstract
The long‐term effects of intermittent flooding on soil properties were studied in field experiments on a Vertisol cropped with rice in Senegal. The dominant clay minerals were smectite and kaolinite. When the soil was reduced after flooding, its cation exchange capacity (CEC) increased to twice that of its oxidized, unflooded state. Mössbauer spectroscopy showed an increase in smectite structural FeII upon reduction, which explained a part of the increase in CEC. The rest of the increase was attributed to the removal of iron oxyhydroxide coatings by reductive dissolution. The reduction and dissolution of oxides under the field conditions were substantiated by analysis of the surfaces of vermiculites buried in the Ap horizons of the cropped and the non‐cropped soils. The redox‐induced CEC changes were found to be reversible after 22 cycles of rice cropping. Nevertheless, the structural Fe and free Fe contents of the rice field Ap horizon were less than those of soil in uncropped neighbouring land, suggesting that inundation induced weathering and eluviation of the minerals. The observed changes in CEC and related redox reactions may substantially modify proton, anion and cation balances in intermittently flooded soils.
Url:
DOI: 10.1046/j.1365-2389.2002.00423.x
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Favre</name><affiliation wicri:level="1"><mods:affiliation>IRD, BP 5045, 34032 Montpellier Cedex 1, France</mods:affiliation><country xml:lang="fr">France</country><wicri:regionArea>IRD, BP 5045, 34032 Montpellier Cedex 1</wicri:regionArea></affiliation><affiliation wicri:level="1"><mods:affiliation>ENAC‐LPE, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland</mods:affiliation><country xml:lang="fr">Suisse</country><wicri:regionArea>ENAC‐LPE, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne</wicri:regionArea></affiliation><affiliation wicri:level="1"><mods:affiliation>E-mail: fabienne.favre@epfl.ch</mods:affiliation><country wicri:rule="url">Suisse</country></affiliation></author><author><name sortKey="Tessier, D" sort="Tessier, D" uniqKey="Tessier D" first="D." last="Tessier">D. 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Génin</name><affiliation wicri:level="1"><mods:affiliation>Laboratoire de Chimie Physique et Microbiologie pour l'Environnement, UMR 7564 CNRS‐Université H. Poincaré, 405 rue de Vandoeuvre, 54600 Villiers‐Lès‐Nancy, France</mods:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Laboratoire de Chimie Physique et Microbiologie pour l'Environnement, UMR 7564 CNRS‐Université H. Poincaré, 405 rue de Vandoeuvre, 54600 Villiers‐Lès‐Nancy</wicri:regionArea></affiliation></author><author><name sortKey="Gates, W P" sort="Gates, W P" uniqKey="Gates W" first="W. P." last="Gates">W. P. Gates</name><affiliation wicri:level="1"><mods:affiliation>CSIRO Land and Water, PMB No 2, Glen Osmond, SA 5064, Australia</mods:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>CSIRO Land and Water, PMB No 2, Glen Osmond, SA 5064</wicri:regionArea></affiliation></author><author><name sortKey="Boivin, P" sort="Boivin, P" uniqKey="Boivin P" first="P." last="Boivin">P. Boivin</name><affiliation wicri:level="1"><mods:affiliation>IRD, BP 5045, 34032 Montpellier Cedex 1, France</mods:affiliation><country xml:lang="fr">France</country><wicri:regionArea>IRD, BP 5045, 34032 Montpellier Cedex 1</wicri:regionArea></affiliation><affiliation wicri:level="1"><mods:affiliation>ENAC‐LPE, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland</mods:affiliation><country xml:lang="fr">Suisse</country><wicri:regionArea>ENAC‐LPE, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne</wicri:regionArea></affiliation></author></analytic><monogr></monogr><series><title level="j" type="main">European Journal of Soil Science</title><title level="j" type="alt">EUROPEAN JOURNAL OF SOIL SCIENCE</title><idno type="ISSN">1351-0754</idno><idno type="eISSN">1365-2389</idno><imprint><biblScope unit="vol">53</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="175">175</biblScope><biblScope unit="page" to="183">183</biblScope><biblScope unit="page-count">9</biblScope><publisher>Blackwell Science Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2002-06">2002-06</date></imprint><idno type="ISSN">1351-0754</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">1351-0754</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>America journal</term><term>Apox</term><term>Biological reduction</term><term>Blackwell science</term><term>Cation</term><term>Cation exchange capacity</term><term>Chemical analyses</term><term>Chemical analysis</term><term>Clay minerals</term><term>Clay surfaces</term><term>Cmol</term><term>Cmolc</term><term>Complete dissolution</term><term>Crop cycle</term><term>Different times</term><term>Dioctahedral smectites</term><term>European journal</term><term>Feii</term><term>Feiii</term><term>Field conditions</term><term>Gley formation</term><term>Goethite</term><term>Goethite coatings</term><term>Hyperfine field</term><term>Hyperfine parameters</term><term>Iapox</term><term>Initial state</term><term>Iron oxides</term><term>Iron reduction</term><term>Irrigation scheme</term><term>Isomer shift</term><term>Large amount</term><term>Layer charge</term><term>Microbial reduction</term><term>Mossbauer</term><term>Mossbauer data</term><term>Mossbauer spectra</term><term>Mossbauer spectroscopy</term><term>Neighbouring</term><term>Neighbouring land</term><term>Octahedral</term><term>Octahedral feii</term><term>Octahedral feiii</term><term>Octahedral sites</term><term>Organic matter</term><term>Oxidation state</term><term>Oxide</term><term>Oxide coatings</term><term>Oxidized</term><term>Oxidized sample</term><term>Oxidized samples</term><term>Oxidized soil</term><term>Oxidized soil samples</term><term>Oxyhydroxide</term><term>Oxyhydroxide coatings</term><term>Physical properties</term><term>Positive charge</term><term>Quadrupole splitting</term><term>Rainy season</term><term>Redox</term><term>Redox processes</term><term>Reductive dissolution</term><term>Relative area</term><term>Relative percentages</term><term>Rice crop</term><term>Rice field</term><term>Rice production</term><term>Room temperature</term><term>Roth</term><term>Sample iapox</term><term>Samples apox</term><term>Scanning electron microscopy</term><term>Smectite</term><term>Smectites</term><term>Soil reduction</term><term>Soil samples</term><term>Soil science</term><term>Soil science society</term><term>Spatial variation</term><term>Structural iron</term><term>Stucki</term><term>Test mineral</term><term>Test minerals</term><term>Test vermiculite</term><term>Vermiculite</term><term>Vermiculite surfaces</term><term>Weathering effect</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>America journal</term><term>Apox</term><term>Biological reduction</term><term>Blackwell science</term><term>Cation</term><term>Cation exchange capacity</term><term>Chemical analyses</term><term>Chemical analysis</term><term>Clay minerals</term><term>Clay surfaces</term><term>Cmol</term><term>Cmolc</term><term>Complete dissolution</term><term>Crop cycle</term><term>Different times</term><term>Dioctahedral smectites</term><term>European journal</term><term>Feii</term><term>Feiii</term><term>Field conditions</term><term>Gley formation</term><term>Goethite</term><term>Goethite coatings</term><term>Hyperfine field</term><term>Hyperfine parameters</term><term>Iapox</term><term>Initial state</term><term>Iron oxides</term><term>Iron reduction</term><term>Irrigation scheme</term><term>Isomer shift</term><term>Large amount</term><term>Layer charge</term><term>Microbial reduction</term><term>Mossbauer</term><term>Mossbauer data</term><term>Mossbauer spectra</term><term>Mossbauer spectroscopy</term><term>Neighbouring</term><term>Neighbouring land</term><term>Octahedral</term><term>Octahedral feii</term><term>Octahedral feiii</term><term>Octahedral sites</term><term>Organic matter</term><term>Oxidation state</term><term>Oxide</term><term>Oxide coatings</term><term>Oxidized</term><term>Oxidized sample</term><term>Oxidized samples</term><term>Oxidized soil</term><term>Oxidized soil samples</term><term>Oxyhydroxide</term><term>Oxyhydroxide coatings</term><term>Physical properties</term><term>Positive charge</term><term>Quadrupole splitting</term><term>Rainy season</term><term>Redox</term><term>Redox processes</term><term>Reductive dissolution</term><term>Relative area</term><term>Relative percentages</term><term>Rice crop</term><term>Rice field</term><term>Rice production</term><term>Room temperature</term><term>Roth</term><term>Sample iapox</term><term>Samples apox</term><term>Scanning electron microscopy</term><term>Smectite</term><term>Smectites</term><term>Soil reduction</term><term>Soil samples</term><term>Soil science</term><term>Soil science society</term><term>Spatial variation</term><term>Structural iron</term><term>Stucki</term><term>Test mineral</term><term>Test minerals</term><term>Test vermiculite</term><term>Vermiculite</term><term>Vermiculite surfaces</term><term>Weathering effect</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Oxyde</term><term>Science des sols</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The long‐term effects of intermittent flooding on soil properties were studied in field experiments on a Vertisol cropped with rice in Senegal. The dominant clay minerals were smectite and kaolinite. When the soil was reduced after flooding, its cation exchange capacity (CEC) increased to twice that of its oxidized, unflooded state. Mössbauer spectroscopy showed an increase in smectite structural FeII upon reduction, which explained a part of the increase in CEC. The rest of the increase was attributed to the removal of iron oxyhydroxide coatings by reductive dissolution. The reduction and dissolution of oxides under the field conditions were substantiated by analysis of the surfaces of vermiculites buried in the Ap horizons of the cropped and the non‐cropped soils. The redox‐induced CEC changes were found to be reversible after 22 cycles of rice cropping. Nevertheless, the structural Fe and free Fe contents of the rice field Ap horizon were less than those of soil in uncropped neighbouring land, suggesting that inundation induced weathering and eluviation of the minerals. The observed changes in CEC and related redox reactions may substantially modify proton, anion and cation balances in intermittently flooded soils.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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