Effect Of pH, Phosphate and/or Malate on Sulfate Sorption on Andisols

The sulfate sorption was studied on Andisols with variable mineralogical composition and low organic matter content in presence and absence of phosphate or malate ligands at different pH. Crystalline clay mineralogy was similar for all the studied samples, except for the 2C horizon of the pedon 2, which did not show crystalline minerals. The soil samples showed content of allophane ranging from 16% to 42%. The sulfate adsorption decreased when descending the first 3 horizons (A1, 2A2 and 3Bw1) of the pedon 1. This behavior was attributed to the decreasing organic carbon content. At different pH sulfate sorption was drastically decreased by increasing the pH from 4.0 to 7.0, precisely by 80% for sample 5 to 100% for sample 1. Experiments on the competitive sorption of phosphate and sulfate on volcanic soils were carried out. Sulfate sorption was reduced even in the presence of low concentrations of phosphate ions (phosphate/sulfate molar ratio << 1). Sulfate sorption was influenced by many factors as the organic carbon content, pH, the mineralogical composition of soil samples and the order of sulfate and phosphate addition into the soils. Sulfate competes with phosphate particularly when added before phosphate and at low pH values (pH < 4.5). Phosphate more than malate affected the kinetics of sulfate sorption onto a volcanic soil containing a large amount of allophanic materials

Saved in:
Bibliographic Details
Main Authors: Pigna,Massimo, Jara,Alejandra A, Mora,María de la Luz, Violante,Antonio
Format: Digital revista
Language:English
Published: Sociedad Chilena de la Ciencia del Suelo 2007
Online Access:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912007000100005
Tags: Add Tag
No Tags, Be the first to tag this record!
id oai:scielo:S0718-27912007000100005
record_format ojs
spelling oai:scielo:S0718-279120070001000052007-07-31Effect Of pH, Phosphate and/or Malate on Sulfate Sorption on AndisolsPigna,MassimoJara,Alejandra AMora,María de la LuzViolante,Antonio Sulfate adsorption Andisol mineralogical composition phosphate malate The sulfate sorption was studied on Andisols with variable mineralogical composition and low organic matter content in presence and absence of phosphate or malate ligands at different pH. Crystalline clay mineralogy was similar for all the studied samples, except for the 2C horizon of the pedon 2, which did not show crystalline minerals. The soil samples showed content of allophane ranging from 16% to 42%. The sulfate adsorption decreased when descending the first 3 horizons (A1, 2A2 and 3Bw1) of the pedon 1. This behavior was attributed to the decreasing organic carbon content. At different pH sulfate sorption was drastically decreased by increasing the pH from 4.0 to 7.0, precisely by 80% for sample 5 to 100% for sample 1. Experiments on the competitive sorption of phosphate and sulfate on volcanic soils were carried out. Sulfate sorption was reduced even in the presence of low concentrations of phosphate ions (phosphate/sulfate molar ratio << 1). Sulfate sorption was influenced by many factors as the organic carbon content, pH, the mineralogical composition of soil samples and the order of sulfate and phosphate addition into the soils. Sulfate competes with phosphate particularly when added before phosphate and at low pH values (pH < 4.5). Phosphate more than malate affected the kinetics of sulfate sorption onto a volcanic soil containing a large amount of allophanic materialsinfo:eu-repo/semantics/openAccessSociedad Chilena de la Ciencia del SueloRevista de la ciencia del suelo y nutrición vegetal v.7 n.1 20072007-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912007000100005en10.4067/S0718-27912007000100005
institution SCIELO
collection OJS
country Chile
countrycode CL
component Revista
access En linea
databasecode rev-scielo-cl
tag revista
region America del Sur
libraryname SciELO
language English
format Digital
author Pigna,Massimo
Jara,Alejandra A
Mora,María de la Luz
Violante,Antonio
spellingShingle Pigna,Massimo
Jara,Alejandra A
Mora,María de la Luz
Violante,Antonio
Effect Of pH, Phosphate and/or Malate on Sulfate Sorption on Andisols
author_facet Pigna,Massimo
Jara,Alejandra A
Mora,María de la Luz
Violante,Antonio
author_sort Pigna,Massimo
title Effect Of pH, Phosphate and/or Malate on Sulfate Sorption on Andisols
title_short Effect Of pH, Phosphate and/or Malate on Sulfate Sorption on Andisols
title_full Effect Of pH, Phosphate and/or Malate on Sulfate Sorption on Andisols
title_fullStr Effect Of pH, Phosphate and/or Malate on Sulfate Sorption on Andisols
title_full_unstemmed Effect Of pH, Phosphate and/or Malate on Sulfate Sorption on Andisols
title_sort effect of ph, phosphate and/or malate on sulfate sorption on andisols
description The sulfate sorption was studied on Andisols with variable mineralogical composition and low organic matter content in presence and absence of phosphate or malate ligands at different pH. Crystalline clay mineralogy was similar for all the studied samples, except for the 2C horizon of the pedon 2, which did not show crystalline minerals. The soil samples showed content of allophane ranging from 16% to 42%. The sulfate adsorption decreased when descending the first 3 horizons (A1, 2A2 and 3Bw1) of the pedon 1. This behavior was attributed to the decreasing organic carbon content. At different pH sulfate sorption was drastically decreased by increasing the pH from 4.0 to 7.0, precisely by 80% for sample 5 to 100% for sample 1. Experiments on the competitive sorption of phosphate and sulfate on volcanic soils were carried out. Sulfate sorption was reduced even in the presence of low concentrations of phosphate ions (phosphate/sulfate molar ratio << 1). Sulfate sorption was influenced by many factors as the organic carbon content, pH, the mineralogical composition of soil samples and the order of sulfate and phosphate addition into the soils. Sulfate competes with phosphate particularly when added before phosphate and at low pH values (pH < 4.5). Phosphate more than malate affected the kinetics of sulfate sorption onto a volcanic soil containing a large amount of allophanic materials
publisher Sociedad Chilena de la Ciencia del Suelo
publishDate 2007
url http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912007000100005
work_keys_str_mv AT pignamassimo effectofphphosphateandormalateonsulfatesorptiononandisols
AT jaraalejandraa effectofphphosphateandormalateonsulfatesorptiononandisols
AT moramariadelaluz effectofphphosphateandormalateonsulfatesorptiononandisols
AT violanteantonio effectofphphosphateandormalateonsulfatesorptiononandisols
_version_ 1755995619270328320