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dc.contributor.authorMARCHI, G.pt_BR
dc.contributor.authorVILAR, C. C.pt_BR
dc.contributor.authorO'CONNOR, G.pt_BR
dc.contributor.authorSILVA, M. L. N.pt_BR
dc.date.accessioned2015-12-10T11:11:11Zpt_BR
dc.date.available2015-12-10T11:11:11Zpt_BR
dc.date.created2015-12-10pt_BR
dc.date.issued2015pt_BR
dc.identifier.citationRevista Brasileira de Ciência do Solo, v. 39, n. 5, p. 1386-1394, Sep./Oct. 2015.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1031302pt_BR
dc.descriptionIntrinsic equilibrium constants of 17 representative Brazilian Oxisols were estimated from potentiometric titration measuring the adsorption of H+ and OH− on amphoteric surfaces in suspensions of varying ionic strength. Equilibrium constants were fitted to two surface complexation models: diffuse layer and constant capacitance. The former was fitted by calculating total site concentration from curve fitting estimates and pH-extrapolation of the intrinsic equilibrium constants to the PZNPC (hand calculation), considering one and two reactive sites, and by the FITEQL software. The latter was fitted only by FITEQL, with one reactive site. Soil chemical and physical properties were correlated to the intrinsic equilibrium constants. Both surface complexation models satisfactorily fit our experimental data, but for results at low ionic strength, optimization did not converge in FITEQL. Data were incorporated in Visual MINTEQ and they provide a modeling system that can predict protonation-dissociation reactions in the soil surface under changing environmental conditions.por
dc.language.isoporpt_BR
dc.rightsopenAccesspt_BR
dc.titleSurface complexation modeling in variable charge soils: charge characterization by potentiometric titration.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2016-03-01T11:11:11Zpt_BR
dc.subject.nalthesaurusOxisolspor
dc.subject.nalthesaurusChemical equilibriumpor
dc.subject.nalthesaurusVariable charge soilspor
riaa.ainfo.id1031302pt_BR
riaa.ainfo.lastupdate2016-03-01pt_BR
dc.identifier.doihttps://doi.org/10.1590/01000683rbcs20140528por
dc.contributor.institutionGIULIANO MARCHI, CPACpt_BR
dc.contributor.institutionCESAR CRISPIM VILAR, UNIVERSIDADE DO ESTADO DE MATO GROSSOpor
dc.contributor.institutionGEORGE O’CONNOR, UNIVERSITY OF FLORIDApor
dc.contributor.institutionMARX LEANDRO NAVES SILVA, UNIVERSIDADE FEDERAL DE LAVRAS.por
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