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International Conference on

Recent Trends in Environmental Sustainability

ESCON22/NMsB/45
Techno-economical optimization of RB 19 dye removal by electro-Fenton processes
using carbon-felt cathode and DSA-O2 (Ti/ IrO2–Ta2O5) anode

Hammad Khan1*, Muhammad Amad Ud Din1, Sajjad Hussain1, Javaid Rabbani Khan1,
Saima Gul2
1Faculty of Materials and Chemical Engineering, GIK Institute of Engineering Sciences and
Technology, Topi, Swabi, KP
2Department of Chemistry, Islamia College Peshawar, Post Box 25120, Pakistan

Correspondence: hammad@giki.edu.pk

Abstract

Textile effluents comprises complex organic pollutants, synthetic dyes, and other toxic
chemicals and such untreated discharge into the water bodies, originate severe problems in
environment and human health. The conventional processes are deficient for complete removal
of such persistent pollutants, therefore utilizing the advance oxidation processes such as
Electro-Fenton (EF) might be helpful in reducing, removing, and transforming of such
persistent pollutants. In the EF system, the electrode combination (DSA-O2 (Ti/IrO2-Ta2O5)
anode and carbon felt cathode) were employed to degrade the model dye RB-19. The
determination of appropriate condition using conventional one factor at a time (OFAT)
optimization process is uneconomic and inoperative due to having large experimental runs and
lack of precision. This study exploits the statistical and AI based methods for multivariate
analysis of various factors on the cost-effective degradation performance of RB-19. Response
surface methodology (RSM) and Artificial Neural Network (ANN) combined with genetic
algorithm (GA) were employed to model the relationship between four predictors comprising
voltage, initial electrolyte concentration, initial FeSO4 concentration and treatment time and
the two responses (i.e., RB-19 degradation efficiency and energy consumption) in the given
design space. The maximized degradation efficacy at least energy consumption was seen when
voltage, initial electrolyte concentration, initial FeSO4 concentration and treatment time were
maintained at 5.77v, 10.75 mM, 0.41mM and 34.45 min, respectively, for 87.15 % @ 0.458
Wh. Sensitivity analysis showed RB-19 degradation performance is strongly dependent on
reaction time, while the order of significance on RB-19 degradation was found to time>
electrolyte>FeSO4>voltage. This work validates the employing of such combination of
electrodes in EF process for the wastewater decolorization at least energy consumption and
also spell out the probability of optimizing and predicting the decontamination process utilizing
the RSM & ANN approach.

Keywords: dye; wastewater; degradation; decontamination

Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus

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