Pré-concentração de Cr(III) e análise de especiação de cromo empregando montmorilonita saturada com íons potássio
AUTOR(ES)
Frois, Sérgio Ribeiro, Grassi, Marco Tadeu, Fernandes, Tatyane Caruso, Barreto, Ronaldo Adriano dos Santos, Abate, Gilberto
FONTE
Química Nova
DATA DE PUBLICAÇÃO
2011
RESUMO
The clay mineral montmorillonite-K10 (MT), treated under acidic medium and saturated with potassium ions (MTK), was employed in sorption and desorption studies aiming the preconcentration of Cr(III) and the speciation analysis of chromium. The sorption process of Cr(III) was close to 100%, suggesting that MTK was a good material for Cr(III) preconcentration, although, the maximum recovery in HNO3 solution was near 89%. On the other hand, Cr(VI) practically was not retained in MTK, suggesting this material as an appropriate mineral phase to be used in speciation analysis of chromium in aqueous medium.
Documentos Relacionados
- ESPECIAÇÃO DE Cr(III) E Cr(VI) USANDO SISTEMA DE PRÉ-CONCENTRAÇÃO EM FLUXO, MINICOLUNA C18 COM DETECÇÃO POR FAAS
- Estudo da sorção de íons de CR(III) utilizando a macrófita aquática Lemna minor
- Pré-Concentração de metais em matrizes salinas empregando ditiocarbamatos
- Biosorption of binary mixtures of Cr(III) and Cu(II) ions by Sargassum sp
- SEPARAÇÃO E PRÉ-CONCENTRAÇÃO ON-LINE PARA ESPECIAÇÃO DE Hg EM CHORUME POR FI-CVG AAS