Título:	Especiação redox de cromo em solo acidentalmente contaminado com solução sulfocrômica.
Autoria:	MATOS, W. O. NÓBREGA, J. de A. SOUZA, G. B. de NOGUEIRA, A. R. de A.
Afiliação:	Wladiana Oliveira Matos, UFSCar; Joaquim de Araújo Nóbrega, USFCar/SÃO CARLOS, SP.; GILBERTO BATISTA DE SOUZA, CPPSE; ANA RITA DE ARAUJO NOGUEIRA, CPPSE.
Ano de publicação:	2008
Referência:	Química Nova, v. 31, n. 6, p. 1450-1454, 2008.
Conteúdo:	Determination of Cr(VI) and Cr(III) was studied in soil samples accidentally contaminated with sulphochromic solution. Molecular absorption spectrophotometry based on the diphenylcarbazide method was used for the determination of Cr(VI) after its alkaline extraction. The total chromium concentration was determined using ICP OES. The quantification of Cr(III) was accomplished by subtracting the Cr(VI) concentration from the total chromium concentration. Regardless of the known contamination of the soil samples by sulphochromic solution, concentrations of Cr(VI) were below the detection limit. Addition and recovery experiments for Cr(VI) in soil samples with and without organic matter indicated its influence on the reduction of Cr(VI) to Cr(III).
Thesagro:	Solo
Palavras-chave:	Chromium Redox Speciation
Digital Object Identifier:	10.1590/S0100-40422008000600032
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CPPSE)