Interpretation of results obtained from test purification of wastewater with zinc electrodes

Abstract

Basic materials used for electrochemical purification of wastewater are iron and aluminium electrodes. In this paper, results obtained from analysis of wastewater samples before and after electrolysis with zinc electrodes are presented and compared with the results of aluminium electrodes and mixed metal oxide electrodes. In all experiments with zinc, the same materials were used as anode and cathode. After 7 min of electrolysis at only 0,018 A/dm2, concentration of chloride in was reduced using zinc electrodes, and the efficiency of microorganisms removal is double, directly and indirectly. The effects of the main parameters in electrochemical cell with zinc electrodes – changes in the conductivity of the solution, variation of pH, turbidity of samples, removal of chloride and production of hypochlorous acid were investigated.