Comparison of functions for evaluating the effect of Fe and Al oxides on the particle size distribution of kaolin and quartz

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Authors:Arias, M.; Lopez, E.; Barral, M. T.
Author Affiliations:Primary:
Universidade de Santiago, Departamento de Edafoloxia e Química Agricola, Santiago, Spain
Volume Title:Clay Minerals
Source:Clay Minerals, 32(1), p.3-11. Publisher: Mineralogical Society, London, United Kingdom. ISSN: 0009-8558
Publication Date:1997
Note:In English. 24 refs.; illus., incl. 3 tables
Summary:Although it is generally agreed that Fe and Al can act to bind soil particles, their relative efficiencies as aggregants are still disputed. In this work, the aggregating efficiencies of both aged and non-aged Fe and Al oxides precipitated on kaolin or quartz substrates were characterized by comparing their effects on particle size distributions (PSD). To facilitate comparison of PSD data, these were parameterized by fitting them with five different probability density functions (the normal, lognormal, Jaky, fractal and Rosin-Rammler functions). The best fits were given by the Rosin-Rammler function (R2 = 0.997), whose α parameter was used to compare the aggregating efficiency of Fe and Al oxides: in order of decreasing efficiency, non-aged Al > non-aged Fe ≈ aged Fe > aged Al-precipitates.
Subjects:Aggregate; Aluminum oxides; Clastic sediments; Clay minerals; Colloidal materials; Flocculation; Fractals; Framework silicates; Iron oxides; Kaolin; Kaolinite; Oxides; Precipitation; Quartz; Sediments; Sheet silicates; Silica minerals; Silicates; Size distribution; Rosin-Rammler function
Abstract Numbers:97M/3539
Record ID:1997038846
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute.
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