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Kinetics of Dissolution of Noncrystalline Oxides and Crystalline Clay Minerals in a Basic Tiron Solution

Published online by Cambridge University Press:  02 April 2024

Hisato Hayashi  and
Masaharu Yamada
Hisato Hayashi
Affiliation:
Mining College, Akita University, 1-1 Tegata Gakuen-cho, Akita 010, Japan
Masaharu Yamada
Affiliation:
Mining College, Akita University, 1-1 Tegata Gakuen-cho, Akita 010, Japan
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Abstract

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The dissolution behavior of five noncrystalline oxides, montmorillonite, kaolinite, chlorite, and sepiolite in a basic tiron solution was studied at pH 10.5 and 80°C. The results show that for montmorillonite the concentrations of Al and Fe ions dissolved in the treating solution were diminished because of cation-exchange reactions of the sample in the suspension. To explain these observations, a mass-balance equation for the specified cation in solution was formulated, which consisted of both a dissolution term and an ion-exchange term. The several parameters of this differential equation were fitted to allow the calculated results to represent the experimental findings. Using these values, an equation lacking an ion-exchange term was also solved numerically. Thus, a dissolution curve was described, which would have been obtained had no cation exchange taken place. From these equations, the error resulted from the cation-exchange capacity of samples in chemical dissolution methods can be evaluated. According to this estimation, and assuming the value for a 1-hr treatment, an error of about 15% was determined for the amount of noncrystalline components contained in the specimen in this investigation.

Keywords

ChloriteDissolutionKaoliniteMontmorilloniteNoncrystalline, SepioliteTiron solution
Type
Research Article
Information
Clays and Clay Minerals , Volume 38 , Issue 3 , June 1990 , pp. 308 - 314
Copyright
Copyright © 1990, The Clay Minerals Society

References

Alexandrova, L. N., 1960 The use of sodium pyrophosphate for isolating free humic substances and their organomineral compounds from soil Soviet Soil Sci. 190 – 197.Google Scholar
Biermans, V. and Baert, L., 1977 Selective extraction of amorphous Al, Fe and Si oxides using an alkaline tiron solution Clay Miner 12 127 – 135.CrossRefGoogle Scholar
Bird, R. B., Stewart, W. E. and Lightfoot, E. N., 1961 Transport Phenomena New York Wiley 357 – 360.Google Scholar
Follett, E. A. C. McHardy, W. J., Mitchel, B. D. and Smith, B. F. L., 1965 Chemical dissolution techniques in the study of soil clays: Part 1 Clay Miner 6 23 – 34.CrossRefGoogle Scholar
Hashimoto, I., Jackson, M. L. and Swineford, A., 1960 Rapid dissolution of allophane and kaolinite-halloysite after dehydration Clays and Clay Minerals, Proc. 7th Natl. Conf., Washington, D.C., 1958 New York Pergamon Press 102 – 113.Google Scholar
Hayashi, H., 1963 Montmorillonite from some bentonite deposits in Yamagata Prefecture, Japan Clay Sci 1 50 – 56.Google Scholar
Henmi, T., Nakai, M., Seki, T. and Yoshinaga, N., 1983 Structural changes of allophanes during dry grinding: Dependence on SiO2/Al2O3 ratio Clay Miner 18 101 – 107.CrossRefGoogle Scholar
Henmi, T., Tange, K., Minagawa, T. and Yoshinaga, N., 1981 Effect of SiO2/Al2O3 ratio on the thermal reactions of allophane. II. Infrared and X-ray powder diffraction data Clays & Clay Minerals 29 124 – 128.CrossRefGoogle Scholar
Imai, N., Otsuka, R., Kashide, H., Hayashi, H. and Heller, L., 1969 Dehydration of palygorskite and sepiolite from the Kuzuu district, Tochigi Pref., central Japan Proc. Int. Clay Conf., Tokyo, 1969, Vol. 1 Jerusalem Israel Universities Press 99 – 108.Google Scholar
Kodama, H. and Hayashi, H., 1985 Comparative study on chemical dissolution techniques—Application to identification and quantitative determination of non-crystalline silicates Nendo Kagaku 25 139 – 147 (in Japanese).Google Scholar
Kodama, H., Jaakkimainen, M., van Olphen, H. and Veniale, F., 1982 A comparative study of selective chemical dissolution methods for separating non-crystalline components produced by grinding of silicates Proc. Int. Clay Conf., Bologna, Pavia, 1981 Amsterdam Elsevier 399 – 410.Google Scholar
Oinuma, K. and Hayashi, H., 1968 Infrared spectra of clay minerals J. Toyo University, General Education (Nat. Sci.) No. 9 57 – 98.Google Scholar
Sakamoto, T. and Sudo, T., 1958 Magnesiumrich chlorite from the Wanibuchi mine, Shimane Prefecture Miner. Journ 1 348 – 358.Google Scholar
Schwertmann, U., 1964 The differentiation of iron oxides in soil by extraction with ammonium oxalate solution Z. Pflanzenernaehr. Dueng. Bodenkd 105 194 – 202.CrossRefGoogle Scholar
Wada, K., Harada, Y. and Heller, L., 1969 Effect of salt concentration and cation species on the measured cation-exchange capacity of soils and clays Proc. Int. Clay Conf, Tokyo, 1969, Vol. 1 Jerusalem Israel Universities Press 561 – 571.Google Scholar