Título:	Surface complexation modeling in variable charge soils: prediction of cadmium adsorption.
Autoria:	MARCHI, G. VILAR, C. C. O'CONNOR, G. OLIVEIRA, L. M. de BRAGA, A. R. dos S. REIN, T. A.
Afiliação:	GIULIANO MARCHI, CPAC CESAR CRISPIM VILAR, UNIVERSIDADE DO ESTADO DE MATO GROSSO GEORGE O’CONNOR, UNIVERSITY OF FLORIDA LETUZIA MARIA DE OLIVEIRA, UNIVERSITY OF FLORIDA ADRIANA REATTO DOS SANTOS BRAGA, CPAC THOMAZ ADOLPHO REIN, CPAC.
Ano de publicação:	2015
Referência:	Revista Brasileira de Ciência do Solo, v. 39, n. 5, p. 1395-1405, Sep./Oct. 2015.
Conteúdo:	Intrinsic equilibrium constants for 22 representative Brazilian Oxisols were estimated from a cadmium adsorption experiment. Equilibrium constants were fitted to two surface complexation models: diffuse layer and constant capacitance. Intrinsic equilibrium constants were optimized by FITEQL and by hand calculation using Visual MINTEQ in sweep mode, and Excel spreadsheets. Data from both models were incorporated into Visual MINTEQ. Constants estimated by FITEQL and incorporated in Visual MINTEQ software failed to predict observed data accurately. However, FITEQL raw output data rendered good results when predicted values were directly compared with observed values, instead of incorporating the estimated constants into Visual MINTEQ. Intrinsic equilibrium constants optimized by hand calculation and incorporated in Visual MINTEQ reliably predicted Cd adsorption reactions on soil surfaces under changing environmental conditions.
Thesagro:	Cerrado Latossolo
NAL Thesaurus:	Oxisols Chemical equilibrium
Palavras-chave:	Absorção de cádmio Minteq Fiteql
Digital Object Identifier:	https://doi.org/10.1590/01000683rbcs20140529
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CPAC)