Abstract
Sono-electrocaogulation process was successfully applied for the removal of RR120 (Reactive Red 120) in the presence of activated carbon. For this purpose, the process variables were optimized using CCD (Central Composite Design). The operational parameters of the technology were the amount of activated charcoal (0.2-2.0g), amount of NaCl electrolyte (1-10g), sonication time (30-120 min) and RR120 dye concentration (40-120 mg/L), respectively. Consequently, the 100% dye removal was determined at the optimal conditions for the process obtained by CCD. In addition, the sonication time, amount of adsorbent and dye concentrations were found the significant process factors. Furthermore, the effects of other parameters like the electric current, current efficiency, amount of NaCl, temperature and formation of coagulants were also studied in the dye removal process, separately. The FTIR (Fourier Transfer Infrared) spectrums were monitored to identify the classes of functional groups present in the dye molecule before and after the treatment. Therefore, the sono-electrocaogulation process was proved an effective technique for purifying simulated wastewater containing RR120 dye.
Highlights
Sono-electrocaogulation process was successfully applied for the removal of RR120 (Reactive Red 120) in the presence of activated carbon
The reduction potential of RR120 dye azo group is more negative about -0.35 V(versus NHE) as compared to the reduction potentials of perhydroxyl (-0.33V) and superoxide (-0.037V) radicals
Aluminium and graphite electrodes were selected as the anode and cathode and they were in rod shape
Summary
Sono-electrocaogulation process was successfully applied for the removal of RR120 (Reactive Red 120) in the presence of activated carbon. The EC process has been studied by researchers for the treatment of simulated and real wastewater of colors [5-. The purpose of RSM is to perform fewer experiment runs to optimize the operational parameters Factors such as the amount of adsorbent (activated carbon) (g), electrolyte dosage of NaCl (g), sonication time (min) and dye concentration (mg/L) were selected as the operational parameters. The removal of dye from simulated wastewater was analyzed as a response [25]
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