Journal of Environmental Health and Sustainable Development
مجله بهداشت محیط و توسعه پایدار
J Environ Health Sustain Dev
Medical Sciences
http://jehsd.ssu.ac.ir
1
admin
2476-6267
2476-7433
en
jalali
1404
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gregorian
2025
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fulltext
en
Electrocatalytic Oxidation for Removal of COD from Chlorpyrifos Contaminated Wastewater: Optimization and Performance
Water quality and wastewater treatment and reuse
Original articles
<div style="text-align: justify;"><span style="font-size:12pt"><span style="line-height:115%"><span style="unicode-bidi:embed"><span style="font-family:"Times New Roman",serif"><b><i><span style="font-size:10.0pt"><span style="line-height:115%">Introduction:</span></span></i></b><b> </b><span style="font-size:10.0pt"><span style="line-height:115%">The<b> </b>removal of chemical oxygen demand (COD) associated with the pesticide chlorpyrifos (CPS) is critical for protecting aquatic ecosystems and public health. Additionally, incomplete degradation of CPS can yield recalcitrant or more toxic transformation products, thereby increasing ecological and human health risks. Therefore, it is essential to removal the COD contributions attributable to CPS from polluted water.</span></span></span></span></span></span><br>
<span style="font-size:12pt"><span style="line-height:115%"><span style="unicode-bidi:embed"><span style="font-family:"Times New Roman",serif"><b><i><span style="font-size:10.0pt"><span style="line-height:115%">Materials and Methods:</span></span></i></b><b> </b><span style="font-size:10.0pt"><span style="line-height:115%">In this study, response surface methodology (RSM) was applied as an effective approach to optimize COD removal during anodic oxidation (AO). The effects of the operational parameters, namely CPS concentration, current density, and reaction time, were assessed and subsequently optimized. </span></span></span></span></span></span><br>
<span style="font-size:12pt"><span style="line-height:115%"><span style="unicode-bidi:embed"><span style="font-family:"Times New Roman",serif"><b><i><span style="font-size:10.0pt"><span style="line-height:115%">Results:</span></span></i></b><b> </b><span style="font-size:10.0pt"><span style="line-height:115%">The model’s predicted COD removal closely matched experimental observations, exhibiting an R<sup>2</sup> of 0.9915. ANOVA confirmed the significance of the fitted quadratic model, a high <i>F value</i>e (324.7), and regression coefficients approaching unity at the 95% confidence level. The lack-of-fit <i>p-</i>value (0.6071) indicates that the lack of fit is not significant. Under optimized conditions, with an CPS concentration of 17.0 mg L⁻¹, current density of 35 mA cm⁻², and a reaction time of 75 min, the maximum COD removal eeficiency reached 70.2%, with an electrical energy consumption of 0.218 kWh m<sup>-3</sup>. </span></span></span></span></span></span><br>
<b><i><span style="font-size:10.0pt"><span style="line-height:150%"><span style="font-family:"Times New Roman",serif">Conclusion:</span></span></span></i><span style="font-size:10.0pt"><span style="line-height:150%"><span style="font-family:"Times New Roman",serif"> <a name="_Hlk209909450"><sup>•</sup></a></span></span></span></b><span style="font-size:10.0pt"><span style="line-height:150%"><span style="font-family:"Times New Roman",serif">OH was the predominant oxidizing species mediating the removal of COD associated with CPS during the AO process. The AO process, recognized for its environmental compatibility, was successfully applied for COD removal.</span></span></span> <span style="font-size:10.0pt"><span style="line-height:150%"><span style="font-family:"Times New Roman",serif">The AO process is an effective treatment for pesticide-contaminated wastewater.</span></span></span></div>
Advanced Oxidation Process,Chemical Oxygen Demand, Chlorpyrifos,Degradation, Removal.
2815
2824
http://jehsd.ssu.ac.ir/browse.php?a_code=A-10-123-5&slc_lang=en&sid=1
Maryam
Dolatabadi
dolatabadimaryam222@gmail.com