Volume 6, Issue 4 (winter 2021)                   J Health Res Commun 2021, 6(4): 1-14 | Back to browse issues page

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Malakootian M, Ghorbanian M, Firouzeh N, Asadzadeh N. Efficacy of Sulfate-based Advanced Oxidation Process (Microwave/Na2S2O8/Fe2+) for 4-Chlorophenol Removal from Aqueous Solutions. J Health Res Commun 2021; 6 (4) :1-14
URL: http://jhc.mazums.ac.ir/article-1-514-en.html
PhD Student, Student Research Committee, Department of Environmental Health, School of Public Health, Kerman University of Medical Sciences, Kerman, Iran
Abstract:   (1560 Views)
Introduction and purpose:  Chlorophenol is one of the most dangerous and toxic pollutants in industrial effluents and wastewater. The removal of this material from groundwater and surface water is considered a serious problem. This study aimed to evaluate the degradability of 4-Chlorophenol using microwave / Na2S2O8 / Fe2+ process.
Methods: In this quasi-experimental study, the effects of variables, including initial pollutant concentration (0.5-5 mM), contact time (0-30 min), pH (3-11), persulfate concentration (8-80 mM), a dosage of Fe2+ (0.01-0.1 mM), and power output (180-600 W) were investigated on the removal of 4-chlorophenol in a modified domestic microwave. The residual 4-chlorophenol concentration was then measured using a spectrophotometer at 280 nm. The mineralization rate at optimum conditions was determined by assessing the total organic carbon (TOC) removal rate according to the B 5310 standard. Moreover, kinetic models of the process were investigated.
Results: In this study, the optimum removal efficiency of 4-chlorophenol by microwave / Na2S2O8 / Fe2+ process was obtained at 91.38% at 60 mM sodium persulfate concentration, pH = 11, 0.5 mM initial concentration of 4-chlorophenol, and the presence of 600 W microwave radiation at 30 min exposure. In addition, it was revealed that 77% of TOC was removed at optimum conditions. The data followed the pseudo-first-order kinetic model.
Conclusion:  The MW / Na2S2O8 / Fe2+ process can be used as a post-treatment or final treatment of effluent considering the treatment objectives and existing standards for effluent discharge.
 
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Type of Study: Research(Original) | Subject: Environmental Health

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