ESTUDO DA ELETRO-OSMOSE EM SOLOS RESIDUAIS DESENVOLVIMENTO DE EQUIPAMENTO E METODOLOGIA DE ENSAIO / THE STUDY OF ELECTRO-OSMOSIS IN RESIDUAL SOILS: DEVELOPMENT OF TEST EQUIPMENT AND METHODOLOGY

AUTOR(ES)
DATA DE PUBLICAÇÃO

2002

RESUMO

The present dissertation presents a laboratory study of electro-osmosis in a residual soil from gneiss. The objective of this study was to develop test equipment and methodology. Two different cells were constructed,one for natural and the other for reconstituted material. The experimental results are consistent with technical literature values. It was observed that the electro-osmotic flow is proportional to the magnitude of the eletrical potential gradient and shoewd a some what erratic behaviour during the test, which could be due to the physical- chemical reactions through the soil caused by electrolysis. The variation of water content in the specimens was minimal. One curious fact was that the electroosmotic efficiency coefficient, which evaluates the electroosmotic efficiency , turned out to be independent from the eletrical potential gradient. The power expenditure was greater during the initial stages of the tests and tended to stabilise over the remaining time.It was observed a direct relation between the power expenditure and the eletrical potential gradient. For design purposes, the current cost of energy expenditure could be assumed as U21730 0,30 per KW.h/m³. There is a little variation in the temperature of electrolytes during tests. It was also observed that eletroosmotic flow can be improved by acidification of the solution.

ASSUNTO(S)

electro-osmosis electro-osmose

ACESSO AO ARTIGO

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