Desenvolvimento de uma celula eletrolitica com catodo poroso para remoção de chumbo em descartes aquosos

AUTOR(ES)

Rosivania Cristina Widner

DATA DE PUBLICAÇÃO

1995

RESUMO

The need of environment and ground water resources preservation has been brought about a great concern with the industrial wastewater. In order to reduce the pollutant sources efforts has been made searching new alternative solutions. A new set of more strict laws and regulations about this subject has been created in different countries. In the case of heavy metais the limits imposed by the legislation should take into account the cumulative effects and toxicity. The main goal of the present work is to establish a electrolytic method for lead removal from wastewater, using a tridimensional reticulated vitreous carbon cathode. During the optimization of the experimental set up two main parameters have been considered: the electrolyte flow and the cathode porosity. The electrolytic cell uses potential values in such way that lead reduction reaction is under mass transport control. These potentials have been determined using nitrates support electrolyte on platinum and vitreous carbon rotating disc electrodes. The technique selected for this study was hydrodynamic voltammetry. The experiments has been carried out in the electrolytic cell using potential of -0,8 V vs SCE through a chronocoulometric technique. The efficiency of the experimental set up has been followed by AAS analysis of samples taken during the experiments. The cell showed to be efficient in lead removal, reducing the levels of that metal from 50 mg/L to 0,1 mg/L. The best configuration presents cathode 80 ppi and solution flow of 240 Uh. In this case the cathodic efficiency was 16,6%

ASSUNTO(S)

celulas eletroliticas chumbo

Documentos Relacionados

• Desenvolvimento de um processo para a remoção eletrolitica de zinco em efluentes aquosos
• Catodo para célula a combustível de óxido sólido: síntese e caracterização de manganito de lantânio dopado com estrôncio
• Desenvolvimento de uma metodologia espectrofotométrica para determinação de chumbo em sangue.
• Remoção de chumbo(II) em sistemas contínuos por carvão ativado com vapor
• Desenvolvimento de um modelo teÃrico para osciladores com catodo virtual com dois feixes de elÃtrons em contra fluxo.