Desorption of phosphate in oxisols covered by humid brushland ( savannah). II. The reversibility of the phosphate adsorption isotherm with respect to the pH of the equilibrium solution
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Pesquisa Agropecuária Brasileira (Online) |
Texto Completo: | https://seer.sct.embrapa.br/index.php/pab/article/view/17413 |
Resumo: | Experiments were carried out in four oxisols under cerrado vegetation (savannah) to investigate the reversibility of the adsorption isotherm with respect to pH of the equilibrium solution. The adsorbed phosphate was apparently reversible with respect to pH value for the change from pH 4 to 7. Soils containing phosphate previously adsorbed showed a desorption of the order 14% to 28%, for the change from pH 4 to 7. |
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Desorption of phosphate in oxisols covered by humid brushland ( savannah). II. The reversibility of the phosphate adsorption isotherm with respect to the pH of the equilibrium solutionDessorção do fosfato adsorvido em latossolos sob vegetação de cerrado. II. Reversibilidade da isoterma de adsorção de fosfato em relação ao pH solução em equilíbrioExperiments were carried out in four oxisols under cerrado vegetation (savannah) to investigate the reversibility of the adsorption isotherm with respect to pH of the equilibrium solution. The adsorbed phosphate was apparently reversible with respect to pH value for the change from pH 4 to 7. Soils containing phosphate previously adsorbed showed a desorption of the order 14% to 28%, for the change from pH 4 to 7.Foi estudada a influência do pH na adsorção de fosfato em latossolos sob vegetação de cerrado, através do equilíbrio dos solos com soluções de KH2PO4 de concentrações crescentes (1 X 10-4 a 8 X 10-4 M), a 25°C, em pH 4 e pH 7, bem como avaliada a dessorção do fosfato adsorvido a pH 4 ao se reajustar o pH da solução de 4 para 7 e estabelecer novo equilíbrio. O pH tem grande influência sobre a adsorção máxima de fosfato dos latossolos, diminuindo a adsorção com a elevação do pH. Ao se reajustar o pH da solução em equilíbrio de 4 para 7 foi obtida uma dessorção do fosfato anteriormente adsorvido, da ordem de 14 a 28%. A menor dessorção mostrou tendências de estar relacionadas aos maiores teores de óxidos amorfos de alumínio presentes.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraLeal, Jair RochaVelloso, Ary Carlos X.2014-04-15info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/17413Pesquisa Agropecuaria Brasileira; v.8, n.7, 1973: Série Agronomia; 89-92Pesquisa Agropecuária Brasileira; v.8, n.7, 1973: Série Agronomia; 89-921678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/17413/11677info:eu-repo/semantics/openAccess2014-04-15T18:48:36Zoai:ojs.seer.sct.embrapa.br:article/17413Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-04-15T18:48:36Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Desorption of phosphate in oxisols covered by humid brushland ( savannah). II. The reversibility of the phosphate adsorption isotherm with respect to the pH of the equilibrium solution Dessorção do fosfato adsorvido em latossolos sob vegetação de cerrado. II. Reversibilidade da isoterma de adsorção de fosfato em relação ao pH solução em equilíbrio |
title |
Desorption of phosphate in oxisols covered by humid brushland ( savannah). II. The reversibility of the phosphate adsorption isotherm with respect to the pH of the equilibrium solution |
spellingShingle |
Desorption of phosphate in oxisols covered by humid brushland ( savannah). II. The reversibility of the phosphate adsorption isotherm with respect to the pH of the equilibrium solution Leal, Jair Rocha |
title_short |
Desorption of phosphate in oxisols covered by humid brushland ( savannah). II. The reversibility of the phosphate adsorption isotherm with respect to the pH of the equilibrium solution |
title_full |
Desorption of phosphate in oxisols covered by humid brushland ( savannah). II. The reversibility of the phosphate adsorption isotherm with respect to the pH of the equilibrium solution |
title_fullStr |
Desorption of phosphate in oxisols covered by humid brushland ( savannah). II. The reversibility of the phosphate adsorption isotherm with respect to the pH of the equilibrium solution |
title_full_unstemmed |
Desorption of phosphate in oxisols covered by humid brushland ( savannah). II. The reversibility of the phosphate adsorption isotherm with respect to the pH of the equilibrium solution |
title_sort |
Desorption of phosphate in oxisols covered by humid brushland ( savannah). II. The reversibility of the phosphate adsorption isotherm with respect to the pH of the equilibrium solution |
author |
Leal, Jair Rocha |
author_facet |
Leal, Jair Rocha Velloso, Ary Carlos X. |
author_role |
author |
author2 |
Velloso, Ary Carlos X. |
author2_role |
author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Leal, Jair Rocha Velloso, Ary Carlos X. |
dc.subject.none.fl_str_mv |
|
description |
Experiments were carried out in four oxisols under cerrado vegetation (savannah) to investigate the reversibility of the adsorption isotherm with respect to pH of the equilibrium solution. The adsorbed phosphate was apparently reversible with respect to pH value for the change from pH 4 to 7. Soils containing phosphate previously adsorbed showed a desorption of the order 14% to 28%, for the change from pH 4 to 7. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-04-15 |
dc.type.none.fl_str_mv |
|
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/17413 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/17413 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/17413/11677 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
dc.source.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira; v.8, n.7, 1973: Série Agronomia; 89-92 Pesquisa Agropecuária Brasileira; v.8, n.7, 1973: Série Agronomia; 89-92 1678-3921 0100-104x reponame:Pesquisa Agropecuária Brasileira (Online) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Pesquisa Agropecuária Brasileira (Online) |
collection |
Pesquisa Agropecuária Brasileira (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
pab@sct.embrapa.br || sct.pab@embrapa.br |
_version_ |
1793416681569124352 |