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Registros recuperados : 115 | |
6. | | RAIJ, B. van. Gesso agricola Campinas: CATI, 1993 v.3 p.33-36 CATI. Manual tecnico, 40 In: RAIJ, B.van; LOMBARDE NETO, F.; SARTINI, H.J.; KUHN NETO,J. MOURA,J.C.de; DRUGOWICH,M.I.; CORSI,M.; CASTRO,O.M.de; BERTON, R.S. Manual tecnico...solo e agua-Tecnologias...agua no solo. Campinas: CATI, 1993 Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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Registros recuperados : 115 | |
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Registro Completo
Biblioteca(s): |
Embrapa Meio Ambiente. |
Data corrente: |
21/07/1999 |
Data da última atualização: |
15/04/2019 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
AGBENIN, J. O.; ABREU, C. A. de; RAIJ, B. van. |
Afiliação: |
JOHN O. AGBENIN; CLEIDE A. DE ABREU, IAC/CAMPINAS; BERNARDO VAN RAIJ, CNPMA. |
Título: |
Extraction of phytoavailable trace metals from tropical soils by mixed ion exchange resin modified with inorganic and organic ligands. |
Ano de publicação: |
1999 |
Fonte/Imprenta: |
Science of the Total Environment, v.227, p.187-196, 1999. |
Idioma: |
Inglês |
Conteúdo: |
Chelating agents and organic acid ligands readily solubilize trace and heavy metals in soils. We compared Fe, Mn, Cu and Zn extracted from 16 soils by a mixed ion exchange resin (Amberlite IRA-120 + Amberlite IRA-400) modified with six simple inorganic and organic acid ligands with a conventional chelating agent (DTPA) and biossay. The mixed cation-anion exchange resins were saturated with Na-salts of chloride (R-CHL), bicarbonate (R-BIC), fluoride (R-FLU), acetate (R-ACT), citrate (R-CIT) and tartrate (R-TAR). Solubilization and adsorption of Fe and Cu from the soils By resin-ligand systems decreased in the order R-CIT >_ R-FLU >_ R-TAR = R-ACT > R-CHL = R-BIC reflecting differential stability of Fe- and Cu-organic/inorganic complexes. The R-CHL solubilized and adsorbed more Mn and Zn than other resin-ligand systems because of the relatively low pH maintained by the R-CHL-soil suspension. Extraction with DTPA gave similar amounts of Fe and Mn as resin-ligand systems, but DTPA extracted two to three times more Cu and Zn than resin. Resin-extractable Fe, Mn and Cu correlated with the corresponding DTPA-extractable metal contents, while both resin- and DTPA-extractable Cu correlated with the bioassay results. The R-ACT and R-TAR extractable Zn correlated more strongly with the biossay results than DTPA-extractable Zn. Mixed ion exchange resin is apparently feasible for characterizing plant available Fe, Mn, Cu and Zn in soils. |
Palavras-Chave: |
Bioassay; Chemical extraction; Effect; Resin extraction. |
Thesaurus NAL: |
agriculture; soil properties. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02131naa a2200217 a 4500 001 1013137 005 2019-04-15 008 1999 bl uuuu u00u1 u #d 100 1 $aAGBENIN, J. O. 245 $aExtraction of phytoavailable trace metals from tropical soils by mixed ion exchange resin modified with inorganic and organic ligands.$h[electronic resource] 260 $c1999 520 $aChelating agents and organic acid ligands readily solubilize trace and heavy metals in soils. We compared Fe, Mn, Cu and Zn extracted from 16 soils by a mixed ion exchange resin (Amberlite IRA-120 + Amberlite IRA-400) modified with six simple inorganic and organic acid ligands with a conventional chelating agent (DTPA) and biossay. The mixed cation-anion exchange resins were saturated with Na-salts of chloride (R-CHL), bicarbonate (R-BIC), fluoride (R-FLU), acetate (R-ACT), citrate (R-CIT) and tartrate (R-TAR). Solubilization and adsorption of Fe and Cu from the soils By resin-ligand systems decreased in the order R-CIT >_ R-FLU >_ R-TAR = R-ACT > R-CHL = R-BIC reflecting differential stability of Fe- and Cu-organic/inorganic complexes. The R-CHL solubilized and adsorbed more Mn and Zn than other resin-ligand systems because of the relatively low pH maintained by the R-CHL-soil suspension. Extraction with DTPA gave similar amounts of Fe and Mn as resin-ligand systems, but DTPA extracted two to three times more Cu and Zn than resin. Resin-extractable Fe, Mn and Cu correlated with the corresponding DTPA-extractable metal contents, while both resin- and DTPA-extractable Cu correlated with the bioassay results. The R-ACT and R-TAR extractable Zn correlated more strongly with the biossay results than DTPA-extractable Zn. Mixed ion exchange resin is apparently feasible for characterizing plant available Fe, Mn, Cu and Zn in soils. 650 $aagriculture 650 $asoil properties 653 $aBioassay 653 $aChemical extraction 653 $aEffect 653 $aResin extraction 700 1 $aABREU, C. A. de 700 1 $aRAIJ, B. van 773 $tScience of the Total Environment$gv.227, p.187-196, 1999.
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