CHARACTERIZATION OF THE POROUS STRUCTURE OF CHILEAN VOLCANIC SOILS BY NITROGEN ADSORPTION AND MERCURY POROSIMETRY

Pore volume, specific surface area (SSA), and total intragranular porosity (TIP) of Chilean soils derived from volcanic materials were studied. Soil samples involving the 0-15 and 15-30 cm depth of virgin and cultivated Collipulli (Ultisol) and Diguillín (Andisol) soils at two particle size fraction...

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Autores principales:	ANTILÉN,MÓNICA, FÖRSTER,JUAN E., DEL CONFETTO,SYLVIE, RODIER,ELIZABETH, FUDYM,OLIVER, VENEZIA,ANNA M, DEGANELLO,GIULIO, ESCUDEY,MAURICIO
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2004
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072004000400009
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spelling	oai:scielo:S0717-970720040004000092005-09-13CHARACTERIZATION OF THE POROUS STRUCTURE OF CHILEAN VOLCANIC SOILS BY NITROGEN ADSORPTION AND MERCURY POROSIMETRYANTILÉN,MÓNICAFÖRSTER,JUAN E.DEL CONFETTO,SYLVIERODIER,ELIZABETHFUDYM,OLIVERVENEZIA,ANNA MDEGANELLO,GIULIOESCUDEY,MAURICIOPore volume, specific surface area (SSA), and total intragranular porosity (TIP) of Chilean soils derived from volcanic materials were studied. Soil samples involving the 0-15 and 15-30 cm depth of virgin and cultivated Collipulli (Ultisol) and Diguillín (Andisol) soils at two particle size fractions (<1 mm and <2 µm) were considered. From mercury porosimetry and N2 adsorption, mainly mesopores (pore diameter, dpore, about 10 nm) were determined for <1 mm Collipulli samples. Diguillín <1 mm soil shows macroporosity with dpore from 70 nm to 7000 nm. The clay fraction of Collipulli has macropores (dpore from 2000 nm to 40000 nm) and mesopores (dpore from 3 nm to 23 nm), while for Diguillín clay-size fraction most of the porosity comes from macropores (dpore from 50 nm to 800 nm). For all samples the SSA linearly correlates with the mesopore volume (r²=0.781; n=16) determined by N2 adsorption, and with the mesopore + macropore volume (r²= 0.771; n=12) when Collipulli <1mm samples are excluded; an inverse relationship between SSA and organic carbon content was found (r²=0.854; n=14). Thus, the SSA defined mainly by mesopores and macropores is probably related to the soil organic matter content. Mesopores and macropores mainly give the TIP, which increases as particle size decreases. No important changes in micropore and macropore volume, and in TIP were seen as result of cultivation. Mesopore volume is more important in samples dominated by kaolinite than in samples dominated by allophane (4 to 20 times). In general the soil pore distribution, its SSA and TIP are related to its mineralogy and organic matter contentinfo:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.49 n.4 20042004-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072004000400009en10.4067/S0717-97072004000400009
institution	Scielo Chile
collection	Scielo Chile
language	English
description	Pore volume, specific surface area (SSA), and total intragranular porosity (TIP) of Chilean soils derived from volcanic materials were studied. Soil samples involving the 0-15 and 15-30 cm depth of virgin and cultivated Collipulli (Ultisol) and Diguillín (Andisol) soils at two particle size fractions (<1 mm and <2 µm) were considered. From mercury porosimetry and N2 adsorption, mainly mesopores (pore diameter, dpore, about 10 nm) were determined for <1 mm Collipulli samples. Diguillín <1 mm soil shows macroporosity with dpore from 70 nm to 7000 nm. The clay fraction of Collipulli has macropores (dpore from 2000 nm to 40000 nm) and mesopores (dpore from 3 nm to 23 nm), while for Diguillín clay-size fraction most of the porosity comes from macropores (dpore from 50 nm to 800 nm). For all samples the SSA linearly correlates with the mesopore volume (r²=0.781; n=16) determined by N2 adsorption, and with the mesopore + macropore volume (r²= 0.771; n=12) when Collipulli <1mm samples are excluded; an inverse relationship between SSA and organic carbon content was found (r²=0.854; n=14). Thus, the SSA defined mainly by mesopores and macropores is probably related to the soil organic matter content. Mesopores and macropores mainly give the TIP, which increases as particle size decreases. No important changes in micropore and macropore volume, and in TIP were seen as result of cultivation. Mesopore volume is more important in samples dominated by kaolinite than in samples dominated by allophane (4 to 20 times). In general the soil pore distribution, its SSA and TIP are related to its mineralogy and organic matter content
author	ANTILÉN,MÓNICA FÖRSTER,JUAN E. DEL CONFETTO,SYLVIE RODIER,ELIZABETH FUDYM,OLIVER VENEZIA,ANNA M DEGANELLO,GIULIO ESCUDEY,MAURICIO
spellingShingle	ANTILÉN,MÓNICA FÖRSTER,JUAN E. DEL CONFETTO,SYLVIE RODIER,ELIZABETH FUDYM,OLIVER VENEZIA,ANNA M DEGANELLO,GIULIO ESCUDEY,MAURICIO CHARACTERIZATION OF THE POROUS STRUCTURE OF CHILEAN VOLCANIC SOILS BY NITROGEN ADSORPTION AND MERCURY POROSIMETRY
author_facet	ANTILÉN,MÓNICA FÖRSTER,JUAN E. DEL CONFETTO,SYLVIE RODIER,ELIZABETH FUDYM,OLIVER VENEZIA,ANNA M DEGANELLO,GIULIO ESCUDEY,MAURICIO
author_sort	ANTILÉN,MÓNICA
title	CHARACTERIZATION OF THE POROUS STRUCTURE OF CHILEAN VOLCANIC SOILS BY NITROGEN ADSORPTION AND MERCURY POROSIMETRY
title_short	CHARACTERIZATION OF THE POROUS STRUCTURE OF CHILEAN VOLCANIC SOILS BY NITROGEN ADSORPTION AND MERCURY POROSIMETRY
title_full	CHARACTERIZATION OF THE POROUS STRUCTURE OF CHILEAN VOLCANIC SOILS BY NITROGEN ADSORPTION AND MERCURY POROSIMETRY
title_fullStr	CHARACTERIZATION OF THE POROUS STRUCTURE OF CHILEAN VOLCANIC SOILS BY NITROGEN ADSORPTION AND MERCURY POROSIMETRY
title_full_unstemmed	CHARACTERIZATION OF THE POROUS STRUCTURE OF CHILEAN VOLCANIC SOILS BY NITROGEN ADSORPTION AND MERCURY POROSIMETRY
title_sort	characterization of the porous structure of chilean volcanic soils by nitrogen adsorption and mercury porosimetry
publisher	Sociedad Chilena de Química
publishDate	2004
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072004000400009
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CHARACTERIZATION OF THE POROUS STRUCTURE OF CHILEAN VOLCANIC SOILS BY NITROGEN ADSORPTION AND MERCURY POROSIMETRY

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