Aspects that Modify the Dissolution of Aluminum Electrodes in an Effluent from the Tissue Paper Industry

A. I. Vázquez, C. Gerónimo, I. González, R. Cruz, M.I. Lázaro, and I. Rodríguez
ECS Transactions, 29 (1) 81-91 (2010), 2010.


The electrocoagulation technology has emerged as a suitable option for the treatment of different types of wastewater. However, one of the aspects that have limited its application is the passivation phenomena involved in aluminum dissolution. Hence, this paper analyzes the oxidation behavior of aluminum in an effluent from tissue paper industry, and synthetic solution. The effluent contains high concentrations of organic matter, chloride and sulfate ions. Through micro-electrolysis experiments, the energy necessary for oxidation of aluminum electrodes, and the zone of potential for the electrodes passivation were studied. Experiments using industrial solution showed no passivation of the aluminum electrodes and also that the anodic current involved is much higher than the observed in experiments where synthetic solutions were used