Especiação redox de cromo em solo acidentalmente contaminado com solução sulfocrômica
AUTOR(ES)
Matos, Wladiana Oliveira, Nóbrega, Joaquim de Araújo, Souza, Gilberto Batista de, Nogueira, Ana Rita Araujo
FONTE
Química Nova
DATA DE PUBLICAÇÃO
2008
RESUMO
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).
Documentos Relacionados
- Aplicação de metodos quimiometricos na especiação de cromo (VI) em solução aquosa
- Especiação iônica da solução percolada de um solo tratado com lama de cal.
- Especiação de cromo em cimentos e derivados de cimento brasileiros
- Atividade fotossintética de plantas cultivadas em solo contaminado com picloram
- Especiação de metais pesados em solo tratado com composto de lixo urbano.