Decolorination of Reactive Blue19 Dye in Dying Industries Wastewater by Electro-Fenton Process

Due to increase of water consumption and lack of resources, wastewater reuse, especially in the industries, as one of the methods for supplying water needs is considered. Dyeing industries are among the large consumers of water and the major problem of their produced wastewater is that it contains color materials and it is non-biodegradable. The conventional methods for removing color from wastewater often lead to production of a large amount of sludge, posing the problems of sludge disposal and treatment. Electro-Fenton process is an advanced oxidation process which can decrease the pollutants organic and color concentrations effectivelly.

In this method, sampling of wastewater was done according to standard methods book for the examination of water and wastewater principles. Then the samples were transferred to the made electrochemical cell pilot, and the impact of various parameters including the amount of electric current, rate of consumption of iron ions, pH and electrolysis time on operating conditions of process was evaluated.

The results showed that under the optimal conditions as current intensity of 20 V for color concentration of 100 mg/L and current intensity of 30 V for color concentration of over 200 mg/L time range of45-60 min, iron ion oncentration of 0.3 mg/L and pH = 4, color removal of 100% can be achieved.

Electro-Fenton process is capable of removing Reactive Blue19 dye with different concentrations and maximum efficiency. Based on the results obtained, it was found that the electric current intensity and iron ion concentration are the parameters affecting the Electro-Fenton process for the removal Reactive Blue19 dye, whereas electrolysis time and pH parameters were less effective on the efficiency of Electro-Fenton process for the removal of Reactive Blue19 dye