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| 2. |  | LIMA FILHO, O. F. de; SILVA, C. J. da; MOUTA, E. R. Efeito da aplicação de escória de siderurgia granulada em cana-soca junto com a adubação NPK. In: REUNIÃO BRASILEIRA DE FERTILIDADE DO SOLO E NUTRIÇÃO DE PLANTAS, 29.; REUNIÃO BRASILEIRA SOBRE MICORRIZAS, 13.; SIMPÓSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 11.; REUNIÃO BRASILEIRA DE BIOLOGIA DO SOLO, 8., 2010, Guarapari. Fontes de nutrientes e produção agrícola: modelando o futuro: anais. Viçosa, MG: SBCS, 2010. 1 CD-ROM. FERTBIO 2010.| Biblioteca(s): Embrapa Agropecuária Oeste. |
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Registro Completo
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
27/03/2008 |
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Data da última atualização: |
28/06/2018 |
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Autoria: |
CASAGRANDE, J. C.; SOARES, M. R.; MOUTA, E. R. |
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Afiliação: |
José Carlos Casagrande, Universidade Federal de São Carlos/Centro de Ciências Agrárias/Departamento de Recursos Naturais e Proteção Ambiental; Marcio Roberto Soares, Universidade Federal de São Carlos/Centro de Ciências Agrárias/Departamento de Recursos Naturais e Proteção Ambiental; Ernesto Rinaldi Mouta, Universidade Federal de São Carlos/Centro de Ciências Agrárias/Departamento de Recursos Naturais e Proteção Ambiental. |
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Título: |
Zinc adsorption in highly weathered soils. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 43, n. 1, p. 131-139, jan. 2008 |
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Idioma: |
Inglês |
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Notas: |
Título em português: Adsorção de zinco em solos altamente intemperizados. |
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Conteúdo: |
The objective of this work was to assess the effects of pH and ionic strength upon zinc adsorption, in three highly weathered variable charge soils. Adsorption isotherms were elaborated from batch adsorption experiments, with increasing Zn concentrations (0?80 mg L-1), and adsorption envelopes were constructed through soil samples reactions with 0.01, 0.1 and 1 mol L-1 Ca(NO3)2 solutions containing 5 mg L-1 of Zn, with an increasing pH value from 3 to 8. Driving force of reaction was quantified by Gibbs free energy and separation factor. Isotherms were C-, H- and L-type and experimental results were fitted to nonlinear Langmuir model. Maximum adsorption ranged from 59?810 mg kg-1, and Zn affinity was greater in subsoil (0.13?0.81 L kg-1) than in the topsoil samples (0.01?0.34 L kg-1). Zinc adsorption was favorable and spontaneous, and showed sharply increase (20?90%) in the 4?6 pH range. No effect of ionic strength was observed at pH values below 5, because specific adsorption mechanisms predominated in the 3?5 pH range. Above pH 5, and in subsoil samples, Zn was adsorbed by electrostatic mechanisms, since ionic strength effect was observed. Despite depth and ionic strength effects, Zn adsorption depends mainly on the pH. |
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Palavras-Chave: |
adsorption envelope; adsorption isotherm; elemento-traço; envelope de adsorção; força iônica; isoterma de adsorção; trace element. |
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Thesagro: |
Ph. |
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Thesaurus NAL: |
ionic strength. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/38160/1/43n01a17.pdf
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Marc: |
LEADER 02041naa a2200265 a 4500
001 1123240
005 2018-06-28
008 2008 bl uuuu u00u1 u #d
100 1 $aCASAGRANDE, J. C.
245 $aZinc adsorption in highly weathered soils.
260 $c2008
500 $aTítulo em português: Adsorção de zinco em solos altamente intemperizados.
520 $aThe objective of this work was to assess the effects of pH and ionic strength upon zinc adsorption, in three highly weathered variable charge soils. Adsorption isotherms were elaborated from batch adsorption experiments, with increasing Zn concentrations (0?80 mg L-1), and adsorption envelopes were constructed through soil samples reactions with 0.01, 0.1 and 1 mol L-1 Ca(NO3)2 solutions containing 5 mg L-1 of Zn, with an increasing pH value from 3 to 8. Driving force of reaction was quantified by Gibbs free energy and separation factor. Isotherms were C-, H- and L-type and experimental results were fitted to nonlinear Langmuir model. Maximum adsorption ranged from 59?810 mg kg-1, and Zn affinity was greater in subsoil (0.13?0.81 L kg-1) than in the topsoil samples (0.01?0.34 L kg-1). Zinc adsorption was favorable and spontaneous, and showed sharply increase (20?90%) in the 4?6 pH range. No effect of ionic strength was observed at pH values below 5, because specific adsorption mechanisms predominated in the 3?5 pH range. Above pH 5, and in subsoil samples, Zn was adsorbed by electrostatic mechanisms, since ionic strength effect was observed. Despite depth and ionic strength effects, Zn adsorption depends mainly on the pH.
650 $aionic strength
650 $aPh
653 $aadsorption envelope
653 $aadsorption isotherm
653 $aelemento-traço
653 $aenvelope de adsorção
653 $aforça iônica
653 $aisoterma de adsorção
653 $atrace element
700 1 $aSOARES, M. R.
700 1 $aMOUTA, E. R.
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 43, n. 1, p. 131-139, jan. 2008
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Embrapa Unidades Centrais (AI-SEDE) |
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