A new simple approach to evaluate pedogenic clay transformation in a Vertic Calcisol

Riccardo Scalenghe, Dominique Righi, Sabine Petit, Claudio Nunzio Territo

Risultato della ricerca: Article

5 Citazioni (Scopus)

Abstract

The aim of this study is to characterize the pedogenic clay minerals by using simple approach: Mixing mineralogical and geochemical findings. The fine clay fractions (< 0.1 μm) of a Vertic Cambisol profile were studied by means of X-ray diffraction (XRD), infrared spectroscopy (FTIR) and cation exchange capacity (CEC). Qualitative and quantitative mineralogical compositions of the clay mixture were determined. Moreover, chemical equilibria and thermodynamic stabilities of minerals (calcite, gypsum, kaolinite, smectites and illites) were studied using results of ionic activities obtained from total concentration of various aqueous species in water extracts from soil-saturated pastes. XRD analysis shows a good homogeneity in the mineralogical composition of the soil material, with depth of soil profiles. The identified clay minerals are mainly illite-smectite mixed layers (I/S) and kaolinite. The chemical analysis of saturated paste extracts with clay minerals shows a slight undersaturation of the illitic phase while smectites and also calcite and gypsum reach the thermodynamic equilibrium along the soil profile
Lingua originaleEnglish
pagine (da-a)345-349
Numero di pagine5
RivistaJournal of Geochemical Exploration
Volume88
Stato di pubblicazionePublished - 2006

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smectite
clay mineral
Clay minerals
Kaolin
Soils
Calcium Sulfate
clay
gypsum
kaolinite
soil profile
Calcium Carbonate
calcite
Ointments
thermodynamics
X-ray diffraction
Cambisol
Chemical analysis
infrared spectroscopy
cation exchange capacity
illite

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology
  • Economic Geology

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A new simple approach to evaluate pedogenic clay transformation in a Vertic Calcisol. / Scalenghe, Riccardo; Righi, Dominique; Petit, Sabine; Territo, Claudio Nunzio.

In: Journal of Geochemical Exploration, Vol. 88, 2006, pag. 345-349.

Risultato della ricerca: Article

Scalenghe, Riccardo ; Righi, Dominique ; Petit, Sabine ; Territo, Claudio Nunzio. / A new simple approach to evaluate pedogenic clay transformation in a Vertic Calcisol. In: Journal of Geochemical Exploration. 2006 ; Vol. 88. pagg. 345-349.
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