Data/hora: 20/06/2024 08:25:16

Biblioteca(s): | Embrapa Pecuária Sudeste.
Data corrente: | 18/08/2008
Data da última atualização: | 07/03/2023
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.
Título: | Especiação redox de cromo em solo acidentalmente contaminado com solução sulfocrômica.
Ano de publicação: | 2008
Fonte/Imprenta: | Química Nova, v. 31, n. 6, p. 1450-1454, 2008.
DOI: | 10.1590/S0100-40422008000600032
Idioma: | Português
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).
Palavras-Chave: | Chromium Redox; Speciation.
Thesagro: | Solo.
Categoria do assunto: | W Química e Física
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/40871/1/PROCIGBS2008.00050.pdf
Registro original: | Embrapa Pecuária Sudeste (CPPSE)
Exemplares: | CPPSE - (17801-1) - UPC - AP - DD - PROCI-2008.00050 - MAT - 2008.00050 - DIS