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Determination of Noncrystalline Soil Components by Weight Difference after Selective Dissolution

Published online by Cambridge University Press:  01 July 2024

Steven C. Hodges  and
L. W. Zelazny
Steven C. Hodges
Affiliation:
Department of Agronomy, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
L. W. Zelazny
Affiliation:
Department of Agronomy, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
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Abstract

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A procedure based on loss of weight after selective dissolution analysis (SDA) and washing with (NH4)2CO3 was developed for estimating the noncrystalline material content of soils derived from widely different parent materials. After extracting with 0.2 N ammonium-oxalate or boiling 0.5 N NaOH solutions, samples were washed with 1 N (NH4)2CO3 to remove excess dissolution agents and to prevent sample dispersion. The amount of noncrystalline material removed from the sample by the extracting solution was estimated by weighing the leached products dried to constant weight at 110°C. The results match closely with those obtained by chemical analyses of the dissolution product and assignment of the appropriate water. The proposed weight-loss method is less time-consuming than the chemical method, and no assumptions need be made concerning sample homogeneity or water content of the noncrystalline material.

Extractions of whole soil and dispersed clay fractions indicated that noncrystalline material determinations on the clay fractions underestimated the noncrystalline material content for whole soils from 0 to 34%. Acid ammonium oxalate was found to be a much more selective extractant for noncrystalline materials than NaOH.

Резюме

Резюме

Была разработана процедура для оценки содержания некристаллического материала почв, переотложенного из самых разнообразных материнских источников. Процедура основана на потере веса после применения анализа селективного растворения (АСР) и промывания (NH4)2CO3. После экстрагирования с помощью 0,2 N щавелевокислого аммония или кипящего 0,5 N раствора NaОН образцы промывались 1 N (NH4)2CO3, чтобы удалить излишки растворителей и предотвратить разрушение образцов. Количество некристаллического материала, выделенного из образца экстрагирующим раствором, определялось взвешиванием выщелоченных продуктов после их высушивания до постоянного веса при 110°С. Результаты хорошо согласуются с результатами, полученными с помощью химических анализов продукта растворения и использования соответствующей воды. Предложенный метод потери веса требует меньше времени, чем химический метод, и не требуется никаких предположений об однородности образцов или насыщенности водой некристаллических материалов.

Экстракции всей почвы и рассеянных глинистых частиц указывают, что определения некристаллического материала на глинистых частицах приводят к недооценке содержания некристаллического материала для всей почвы от 0 до 34%. Кислота щавелевокислого аммония оказалась гораздо более селективным экстрагентом для некристаллических материалов, чем NaОН. [N. R.]

Resümee

Resümee

Es wurde eine Untersuchungsmethode entwickelt, die auf dem Gewichtsverlust beruht, der nach selektiver Auflösung und Waschen mit (NH4)2CO3 auftritt. Mit dieser Methode wird der Gehalt an nichtkristallinem Material in Böden bestimmt, das von sehr unterschiedlichem Ausgangsmaterial stammt. Nach der Extraktion mit 0,2 N Ammoniumoxalatlösung oder dem Kochen mit 0,5 N NaOH wurden die Proben mit 1 N (NH4)2CO3 gewaschen, um überschüssiges Lösungsmittel zu entfernen und die Dispersion der Probe zu verhindern. Die Menge des aus der Probe durch Extraktion entfernten nichtkristallinen Materials wurde durch Wäugen der bei 110°C konstant getrockneten Auslaugungsprodukte bestimmt. Das Ergebnis kommt nahe an das Ergebnis heran, das bei der chemischen Analyse des Lösungsproduktes unter Berücksichtigung der entsprechenden Wassermenge erhalten wurde. Die vorgeschlagene Gewichtsverlust-Methode erfordert weniger Zeit als die chemische Methode. Außerdem müssen keine Annahmen bezüglich der Probenhomogenität oder des Wassergehaltes des nichtkristallinen Materials gemacht werden.

Die Extraktion des Gesamtbodens und dispergierter Tonfraktionen deutet darauf hin, daß die Bestimmung des nichtkristallinen Materials in den Tonfraktionen den Gehalt an nichtkristallinem Material in den Gesamtböden um bis zu 34% zu klein erscheinen läßt. Es zeigt sich, daß saures Ammoniumoxalat ein viel selektiveres Extraktionsmittel für nichtkristallines Material ist als NaOH. [U. W.]

Résumé

Résumé

Une procédure basée sur la perte de poids après une analyse de dissolution sélective (SDA) et un lavage au (NH4)2CO3 a été développée pour estimer le contenu de matériel non-cristallin de sols dérivés de mantériaux parents très différents. Après extraction à l'ammonium oxalate 0,2 N ou par des solutions de 0,5 N NaOH bouillantes, les échantillons ont été lavés avec du 1 N (NH4)2CO3 pour enlever les agents de dissolution en excès et pour prévenir la dispersion de l’échantillon. La quantité de matériel non-cristallin retiré de l’échantillon par la solution extrayante a été estimée en pesant les produits lessivés, sechés à 110°C à un poids constant. Les résultats sont très proches de ceux obtenus par analyses chimiques du produit de dissolution et l'attribution de l'eau appropriée. La méthode de perte de poids proposée prend moins de temps que la méthode chimique, et on ne dot rien assumer concernant l'homogénéité de l’échantillon ou le contenu en eau du matériel non-cristallin.

Des extractions de fractions de sol entier et d'argile dispersée ont indiqué que les déterminations de matériel non-cristallin sur les fractions d'argile sous-estimaient le contenu de matériel non-cristallin pour les sols entiers de 0 à 34%. L'acide d'ammonium oxalate s'est montré être un extrayant beaucoup plus sélectif pour les matériaux non-cristallins que NaOH. [D. J.]

Keywords

AllophaneNoncrystallineQuantificationSelective dissolutionSoilWeight loss
Type
Research Article
Information
Clays and Clay Minerals , Volume 28 , Issue 1 , February 1980 , pp. 35 - 42
Copyright
Copyright © Clay Minerals Society 1980

Footnotes

1

The term noncrystalline as used in this paper follows the recommendation of Wada (1977) in describing materials having only local and nonrepetitive structure and includes para-crystalline materials (having one-dimensional structural units) such as imogolite.

References

Literature Cited

Alexiades, C. A. and Jackson, M. L., (1966) Quantitative clay mineralogical analysis of soils and sediments Clays & Clay Minerals 14 35–52.CrossRefGoogle Scholar
Aomine, S. and Jackson, J. L., (1959) Allophane determination in Ando soils by cation-exchange capacity delta value Soil Sci. Soc. Amer. Proc. 23 210–214.CrossRefGoogle Scholar
Arshad, M A St Arnaud, R. J. and Huang, P. M., (1972) Dissolution of trioctahedral layer silicates by ammonium oxalate, sodium dithionite-citrate-bicarbonate, and potassium pyrophosphate Can. J. Soil Sci. 52 19–26.CrossRefGoogle Scholar
Baril, R. and Bitton, G., (1969) Teneurs élevées de fer libre et identification taxonomique de certain sols due Québec contenant de la magnetite Can. J. Soil Sci. 49 1–9.CrossRefGoogle Scholar
Blume, H. P. and Schwertipann, U., (1969) Genetic evaluation of the profile distribution of aluminum, iron and manganese oxides Soil Sci. Soc. Amer. Proc. 33 438–444.CrossRefGoogle Scholar
de Villiers, J. M., (1971) The problem of quantitative determination of allophane in soil Soil Sci. 112 2–7.CrossRefGoogle Scholar
Fey, M. V. and LeRoux, J., (1976) Quantitative determination of allophane in soil clays Proc. Int. Clay Conf. 1975 451–464.Google Scholar
Fey, M. V. and LeRoux, J., (1977) Properties and quantitative estimation of poorly crystalline components in sesquioxidic soil clays Clays & Clay Minerals 25 285–294.CrossRefGoogle Scholar
Follett, E. A. C. McHardy, W. J. Mitchell, BD and Smith, B. F. L., (1965) Chemical dissolution techniques in the study of soil clays: Part 1 Clay Miner. 6 23–34.CrossRefGoogle Scholar
Follett, E. A. C. McHardy, W. J. Mitchell, B. D. and Smith, B. F. L., (1965) Chemical dissolution techniques in the study of soil clays: Part II Clay Miner. 6 35–43.CrossRefGoogle Scholar
Hashimoto, I. and Jackson, M. L., (1960) Rapid dissolution of allophane and kaolinite-halloysite after dehydration Clays & Clay Minerals 7 102–113.Google Scholar
Higashi, T. and Ikeda, H., (1974) Dissolution of allophane by acid oxalate solution Clay Sci. 4 205–212.Google Scholar
Jackson, M. L., (1974) Soil Chemical Analysis—Advanced Course Madison, Wisconsin Published by the author, Dept. of Soil Science, University of Wisconsin 524–534.Google Scholar
Jones, R. C. and Uehara, G., (1973) Amorphous coatings on mineral surfaces Soil Sci. Soc. Amer. Proc. 37 792–798.CrossRefGoogle Scholar
Langston, R. B. and Jenne, E. A., (1964) NaOH dissolution of some oxide impurities from kaolins Clays & Clay Minerals 12 633–647.Google Scholar
McKeague, J. A. and Day, J. H., (1966) Dithionite- and ox-alate-extractable Fe and Al as aids in differentiating various classes of soils Can. J. Soil Sci. 46 13–22.CrossRefGoogle Scholar
Mitchell, B. D. and Farmer, V. C., (1962) Amorphous clay minerals in some Scottish soil profiles Clay Miner. Bull. 5 128–144.CrossRefGoogle Scholar
Sampath, S. and Zelazny, L. W., (1977) Quantitative analysis of gibbsite and kaolinite by differential scanning calorime-try Agron. Abstr. 189.Google Scholar
Saunders, W. M. H., (1964) Phosphate retention by New Zealand soils and its relationship to free sesquioxides, organic matter and other soil properties N. Z. J. Agri. Res. 8 30–57.CrossRefGoogle Scholar
Schwertmann, U., (1964) The differentiation of iron oxides in soil by extraction with ammonium oxalate solution Z. tPflanzenernaehr. Dueng. Bodenk. 105 194–202.CrossRefGoogle Scholar
Schwertmann, U., (1973) Use of oxalate for Fe extraction from soils Can. J. Soil Sci. 53 244–246.CrossRefGoogle Scholar
Schwertmann, U. and Fischer, W. R., (1973) Natural “amorphous” ferric hydroxide Geoderma 10 237–247.CrossRefGoogle Scholar
Segalen, P., (1968) Note sur une méthod de determination des produits minéraux amorphes dans certains sols à hydrox-ydes tropicaux Cah. ORSTOM, Sér. Pédol 6 105–125.Google Scholar
Tokashiki, Y. and Wada, K., (1972) Determination of silicon, aluminum and iron dissolved by successive and selective dissolution treatments of volcanic ash soil clays Clay Sci. 4 105–114.Google Scholar
van Olphen, H., (1971) Amorphous clay materials Science 171 90–91.CrossRefGoogle Scholar
Wada, K., (1977) Allophane and imogolite Minerals in Soil Environments eds 603–638.Google Scholar
Wada, K. and Ataka, H., (1958) The ion uptake mechanism of allophane Soil Plant Food (Tokyo) 4 12–18.CrossRefGoogle Scholar
Wada, K. and Greenland, D. J., (1970) Selective dissolution and differential infrared spectroscopy for characterization of “amorphous” constituents in soil clays Clay Miner. 8 241–254.CrossRefGoogle Scholar
Weber, R. S. and Zelazny, L. W., (1979) Whole soil mineralogy of pyroclastic soils in the Culpepper Basin of Virginia Agron. Abstr. 198.Google Scholar
Wilke, B. M. Schwertmann, U. and Murad, E., (1978) An occurrence of polymorphic halloysite in granite sapolite of the Bayerischer Wald, Germany Clay Miner. 13 67–77.CrossRefGoogle Scholar
Yoshinaga, N. and Aomine, S., (1962) Allophane in some Ando soils Soil Sci. Plant Nutr. 8 6–13.CrossRefGoogle Scholar
Yoshinaga, N. and Aomine, S., (1962) Imogolite in some Ando soils Soil Sci. Plant Nutr. 8 22–29.CrossRefGoogle Scholar