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Kinetics of palygorskite hydrolysis in dilute salt solutions

Published online by Cambridge University Press:  09 July 2018

A. Neaman  and
A. Singer
A. Neaman
Affiliation:
The Seagram Center for Soil and Water Sciences, The Faculty of Agricultural, Food and Environmental Quality Sciences, The Hebrew University of Jerusalem, Rehovot 76100, Israel
A. Singer*
Affiliation:
The Seagram Center for Soil and Water Sciences, The Faculty of Agricultural, Food and Environmental Quality Sciences, The Hebrew University of Jerusalem, Rehovot 76100, Israel
*
*E-mail: [email protected]
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Abstract

Five palygorskite samples with different chemical compositions and specific surface areas (SSA) were used for this study. Batch experiments in dilute salt solutions under neutral conditions were conducted to study the kinetics of clay hydrolysis. The rates of release of Mg and Si differ significantly among the palygorskite samples. It was found that differences in release rate of Mg among the palygorskite samples are due to differences in both surface area and chemical composition. The rate of release of Mg was greater in palygorskites with high SSA and high Mg and Fe contents than that in palygorskites with low SSA and high Al content. The rate of release of Si depends on the SSA of the mineral and is not related to chemical composition. The initial amount of Si released increases with SSA, while the Si rate of release decreases with increasing SSA. These data suggest that the decomposition of palygorskite in soils and sediments also takes place under neutral conditions.

Keywords

palygorskitespecific surface areahydrolysischemical composition
Type
Research Article
Information
Clay Minerals , Volume 35 , Issue 2 , April 2000 , pp. 433 - 441
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2000

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References

Abdul-Latif, N. & Weaver, C.E. (1969) Kinetics of acid dissolution of palygorskite (attapulgite) and sepiolite. Clays Clay Miner. 17, 169–178.Google Scholar
Bain, D.C. & Smith, B.F.L. (1987) Chemical analysis. Pp. 248–274 in: A Handbook of Determinative Methods in Clay Mineralogy (Wilson, M.J., editor). Blackie, Glasgow, UK.Google Scholar
Corma, A., Mifsud, A. & Sanz, E. (1987) Influence of the chemical composition and textural characteristics of palygorskite on the acid leaching of octahedral cations. Clay Miner. 22, 225–232.Google Scholar
Corma, A., Mifsud, A. & Sanz, E. (1990) Kinetics of the acid leaching of palygorskite: influence of the octahedral sheet composition. Clay Miner. 25, 197–205.CrossRefGoogle Scholar
Galán, E. (1996) Properties and applications of palygorskite- sepiolite clays. Clay Miner. 31, 443–453.Google Scholar
González, F., Pesquera, C., Blanco, C., Benito, I., Mendioroz, S. & Pajares, J.A. (1989) Structural and textural evolution of Al- and Mg-rich palygorskites, I. Under acid treatment. Appl. Clay Sci. 4, 373–388.Google Scholar
Grim, R.E. & Kulbicki, G. (1961) Montmorillonite. Hightemperature reactions and classification. Am. Miner. 46, 1329–1369.Google Scholar
Keren, R. (1991) Specific effect of magnesium on soil erosion and water infiltration. Soil Sci. Soc. Am. J. 55, 783–787.Google Scholar
Lindsay, W.L. (1979) Chemical Equilibria in Soils. John Wiley & Sons, New York.Google Scholar
Myriam, M., Suarez, M. & Martin-Pozas, J.M. (1998) Structural and textural modifications of palygorskite and sepiolite under acid treatment. Clays Clay Miner. 46, 225–231.Google Scholar
Neaman, A. & Singer, A. (2000) Rheological properties of aqueous suspensions of palygorskite. Soil Sci. Soc. Am. J. (in press).Google Scholar
Rather-Zohar, Y., Banin, A. & Chen, Y. (1983) Oven drying as a pretreatment for surface-area determination of soils and clays. Soil Sci. Soc. Am. J. 47, 1056–1058.Google Scholar
Rimstidt, J.D. & Barnes, H.L. (1980) The kinetics of silica-water reactions. Geochim. Cosmochim. Ada, 44, 1683–1699.CrossRefGoogle Scholar
Serna, C.J. & Van Scoyoc, G.E. (1979) Infra-red study of sepiolite and palygorskite surfaces. Proc. Int. Clay Conf, Oxford, 197-206.Google Scholar
Shainberg, I., Alperovitch, N. & Keren, R. (1988) Effect of magnesium on the hydraulic conductivity of Na-smectite-sand mixtures. Clays Clay Miner. 36, 432–438.Google Scholar
Singer, A. (1977) Dissolution of two Australian palygorskites in dilute acid. Clays Clay Miner. 25, 126–130.Google Scholar
Singer, A. (1989) Palygorskite and sepiolite group minerals. Pp. 829–872 in: Minerals in the Soil Environments, 2nd edition (Dixon, J.B. & Weed, S.B., editors). Soil Science Society of America, Madison, Wisconsin, USA.Google Scholar
Singer, A. & Norrish, K. (1974) Pedogenic palygorskite occurrences in Australia. Am. Miner. 59, 508–517.Google Scholar
Smith, R.M. & Martell, A.E. (1976) Critical Stability Constants, 4. Inorganic Complexes. Plenum Press, New York.Google Scholar
van Olphen, H. & Fripiat, J.J. (1979) Data Handbook for Clay Materials and Other Non-metallic Minerals. Pergamon Press, Oxford.Google Scholar
Weaver, C.E. & Pollard, L.D. (1975) The Chemistry of Clay Minerals. Elsevier, Amsterdam.Google Scholar
Williams, L.A., Parks, G.A. & Crerar, D.A. (1985) Silica diagenesis, I. Solubility controls. J. Sed. Pet. 55, 301–311.Google Scholar