Hostname: page-component-586b7cd67f-tf8b9 Total loading time: 0 Render date: 2024-12-08T07:38:05.791Z Has data issue: false hasContentIssue false

Brazilian Red Latosol a Typic Soil as an Exchanger: A Thermodynamic Study Involving Cu, Zn, Cd, Hg, Pb, Ca And Na

Published online by Cambridge University Press:  28 February 2024

Claudio Airoldi
Affiliation:
Instituto de Química, Universidade Estadual de Campinas, Caixa Postal 6154, 13083-970 Campinas, São Paulo, Brasil
Silvana A. M. Critter
Affiliation:
Instituto de Química, Universidade Estadual de Campinas, Caixa Postal 6154, 13083-970 Campinas, São Paulo, Brasil
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The thermodynamic cationic exchange process involving divalent (Cu, Zn, Cd, Hg, Pb and Ca) and monovalent (Na) cations in Brazilian red Latosol soil was studied. Using a batchwise method, the exchange was monitored as a function of the added cation concentration and the aqueous suspension of the soil at different temperatures. The isotherm series obtained were adjusted to a modified Langmuir equation, whose results were compared with the proposed Rawat method. The cationic exchange equilibria constants (ln K) vary from 1.97 to 9.80 for the Langmuir equation and 7.06 to 13.50 for the Rawat method. The variation in enthalpies obtained by applying the van't Hoff equation gave, for Langmuir and Rawat procedures, exothermic values for Cu (65.5 and 97.3), Cd (36.9 and 45.6) and Pb (43.0 and 50.7) kJ mol−1, and endothermic values for Zn (40.8 and 30.5), Hg (15.0 and 11.3), Ca (30.4 and 40.0) and Na (32.7 and 42.3) kJ moL−1. The exchanges proceed spontaneously, as indicated by the free energy values: Cu (14.2 and 27.2), Zn (21.6 and 32.0), Cd (16.1 and 23.2), Hg (13.8 and 22.9), Pb (22.6 and 28.3), Ca (17.0 and 25.9) and Na (9.9 and 19.3) kJ mol−1 at 323 K. These results suggest that the interaction occurs by complex formation between the organic matter of the soil matrix and the cations dispersed in aqueous solution.

Type
Research Article
Copyright
Copyright © 1997, The Clay Minerals Society

References

Airoldi, C. and Santos, M.R.M.C.. 1994. Synthesis, characterization, chemisorption and thermodynamic data of urea immobilized on silica. J Mater Chem 4: 14791485.CrossRefGoogle Scholar
Baham, J. and Sposito, G.. 1994. Adsorption of dissoved organic carbon extracted from sewage sludge on montmorillonite and kaolinite in the presence of metal ions. J Environ Qual 23: 147153.CrossRefGoogle Scholar
Baker, D.E. and Amacher, M.C.. 1980. Nickel, copper, zinc, and cadmium. Methods Soil Anal 9: 323335.Google Scholar
Bunzl, K., Schimidt, W. and Sansoni, B.. 1976. Kinetics of ion exchange in soil organic matter: IV. Adsorption and desorption of Pb2+, Cu2+, Cd2+, Zn2+ and Ca2+ by peat. J Soil Sci 27: 3241.CrossRefGoogle Scholar
Camargo, A., Moniz, A.C., Jorge, J.A. and Valadares, J.M.A.S.. 1986. Métodos de análise química, mineralógica e física de solos do Instituto Agronômico de Campinas. B Tec Inst Agron Campinas 106: 193.Google Scholar
Critter, S.A.M., Simoni, J.A. and Airoldi, C.. 1994. Microcalorimetric study of glucose degradation in some Brazilian soils. Thermochim Acta 232: 145154.CrossRefGoogle Scholar
Giles, C.H., MacEwan, T.H., Nakamura, S.N. and Smith, D.. 1960. Studies in adsorption: Part XI. A system of classification of solution adsorption isotherms, and its use in diagnosis of adsorption mechanisms and in measurement of specific surface areas of solids. J Chem Soc 39733993.Google Scholar
Gu, B., Schmitt, J., Chen, Z., Liang, L. and McCarthy, J.F.. 1994. Adsorption and desorption on natural organic matter on iron oxide: mechanisms and models. Environ Sci Technol 28: 3846.CrossRefGoogle ScholarPubMed
Hajiev, S.N., Kertman, S.V., Leykin, U.A. and Amelin, A.N.. 1989. Thermochemical study of ion-exchange processes: V. Sorption of copper ions in complex forming resins. Thermochim Acta 139: 327332.CrossRefGoogle Scholar
Harter, R.D.. 1983. Effect of soil pH on adsorption of lead, copper, zinc and nickel. Soil Sci Soc Am J 47: 4751.CrossRefGoogle Scholar
Jorge, R.A. and Chagas, A.P.. 1988. Ion-exchange equilibria between solid aluminium pectinates and Ca2+, Mn2+, Cu2+ and Fe3+ ions in aqueous solution. J Chem Soc, Faraday Trans 84: 10651073.CrossRefGoogle Scholar
Kabata-Pendias, A. and Pendias, H.. 1984. Trace elements in soils and plants. Boca Raton, FL: CRC Pr. p 1529.Google Scholar
Keith, L.H.. 1988. Principles of environmental sampling. Washington, DC: Am Chem Soc. p 385393.Google Scholar
Klute, A., editor. 1986. Methods of soil analysis: Part 1. Physical and mineralogical methods. Madison, WI: Am Soc Agron and Soil Sci Soc Am. p 3350.CrossRefGoogle Scholar
Kowalska, M., Guler, H. and Cocke, D.L.. 1994. Interactions of clay minerals with organic pollutants. Sci Total Environ 141: 223240.CrossRefGoogle Scholar
Lobartini, J.C., Tan, K.H., Rema, J.A., Gingle, A.R., Pape, C. and Himmelsbach, D.S.. 1992. The geochemical nature and agricultural importance of commercial humic matter. Sci Total Environ 113: 115.CrossRefGoogle Scholar
Marinsky, J.A.. 1966. Ion-exchange: A series advances. New York: Marcel Dekker. p 227236.Google Scholar
McGlashan, M.L.. 1979. Chemical thermodynamics. New York: Academic Pr. p 101317.Google Scholar
Moniz, A.C.. 1972. Elementos de pedologia. São Paulo, Brazil: Editera Univ São Paulo. p 1232.Google Scholar
Oliveira, J.B., Menk, J.R.F. and Rotta, C.L.. 1979. Levantamento Pedológico Semidetalhado dos Solos do Estado de São Paulo. Rio de Janeiro, Brazil: Supren. p 130.Google Scholar
Oliveira, S.F. and Airoldi, C.. 1993. Some ion exchange properties of amorphous titanium (IV) phosphate. Mikrochim Acta 110: 95101.CrossRefGoogle Scholar
Patzkó, A. and Dékány, I.. 1993. Ion exchange and molecular adsorption of a cationic surfactant on clay minerals. Colloids Surf 71: 299307.CrossRefGoogle Scholar
Price, W.J.. 1979. Spectrochemical analysis by atomic absorption. New York: J Wiley. p 112282.Google Scholar
Rawat, J.P., Ansari, A.A. and Singh, R.P.. 1990. Sorption equilibria of lead (II) on some Indian soils—The natural ion exchangers. Colloids Surf 50: 207214.CrossRefGoogle Scholar
Sposito, G.. 1989. The chemistry of soils. New York: Oxford Univ Pr. p 42166.Google Scholar