Electrocoagulation Treatment of Color Solution Containing Colored Index Eriochrome Black T

Document Type : Research Paper


1 Assoc. Prof. of Environmental Health, Faculty of Public Health, Hamedan University of Medical Sciences

2 Assist. Prof. of Environmental Health, Faculty of Public Health Hamedan University of Medical Sciences


The purpose of this study was to conduct an experimental investigation of decolorization of effluents by the electrocoagulation method. Removal of Eriochrome black T from solution in a batch system was investigated using different voltages (10, 20, 30 volt), electrodes (Al, Fe), electrode distances (2, 4 cm), electrolysis times (0 to 30 min.), and pH levels (3.5, 7, 11). Experimental results showed that removal efficiency depended on electrolysis time and applied current. The experiments carried out at 30V and  pH=3.5 further revealed that color removal efficiencies of Fe and Al electrodes over a period of 30 minutes were 96% and 86%, respectively.


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