Evaluation of US/S2O8-2 compilative process performance in the removal of Erythrosine B dye from aqueous solution

Document Type : Original Article


Department of Environmental Health Engineering, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran


Erythrosine B is widely used for dyeing in various applications, especially in the food industry, despite its already proved toxicity and carcinogenicity. Therefore, the purpose of this study is to evaluate the efficiency of the synthesis process of US/S2O8-2 in removing erythrosine B dye from aqueous solution. In this experimental study, the removal of erythrosine B dye using combined persulfate and 40 kHz ultrasound process was studied. All reactions was conducted in a beaker of 1,000 mL in an ultrasonic bath. The effects of operational parameters such as pH of the solution (3-7), initial concentration of erythrosine B dye (10–100 mg/L), and amount of persulfate concentration (0.001–0.005 mol/L) in different contact time were investigated. The results showed that the removal efficiency increased significantly by increasing the oxidant concentration, then a steady trend was observed in the removal of erythrosine B dye. The process used US/S2O8-2 at pH:3, concentration of persulfate at 0.003 mol/L, and the time of 60 min for achieving the highest removal efficiency (98.91%). Ultrasonic device alone had little effect in the removal of this dye. The effects of ion changes from calcium chloride on the performance of the US/S2O8- process were ineffective for erythrosine B dye. The results of the US/S2O8-2 process application in the removal of erythrosine B dye indicated that this process has a suitably proper ability for erythrosine B dye removal and could be used as an effective method for industrial wastewater treatment.


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