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Optimized Study and Column Experiments on Treatment Process of Metronidazole Pharmaceutical Wastewater by Microelectrolysis and Fenton Oxidation

One of the most important wastewater treatment processes is microelectrolysis, which is extensively used in the primary treatment of pharmaceutical wastewater. In this study, microelectrolysis, as a pretreatment method for the refractory metronidazole pharmaceutical wastewater (MPW) of choice, was i...

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Published in:Water, air, and soil pollution air, and soil pollution, 2021-05, Vol.232 (5), Article 182
Main Authors: Xiao, Yang, Shao, Yang, Luo, Min, Ma, Ling-ling, Xu, Dian-dou, Wu, Ming-hong, Xu, Gang
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container_title Water, air, and soil pollution
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creator Xiao, Yang
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description One of the most important wastewater treatment processes is microelectrolysis, which is extensively used in the primary treatment of pharmaceutical wastewater. In this study, microelectrolysis, as a pretreatment method for the refractory metronidazole pharmaceutical wastewater (MPW) of choice, was improved using the Fenton process and used to remove the chemical oxygen demand (COD) and improve the biochemical capability of MPW. The results showed that the highest COD removal of 40.8% was obtained in the presence of optimized significant factors and the BI (BI = biochemical oxygen demand over five days/COD) of MPW increased from 0.10 to 0.31. In addition, the ultraviolet–visible (UV–Vis) spectroscopy demonstrated that metronidazole in MPW was effectively removed during the combined processes. All these results showed that microelectrolysis combined with Fenton oxidation for MPW was an effective treatment process to achieve higher COD removal and biodegradability improvement. Finally, the breakthrough curves at different flow rates were measured to prove the feasibility of the combined process under optimal conditions.
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subjects Analytical methods
Atmospheric Protection/Air Quality Control/Air Pollution
Biochemical oxygen demand
Biodegradability
Biodegradation
Chemical oxygen demand
Climate Change/Climate Change Impacts
Earth and Environmental Science
Environment
Environmental monitoring
Feasibility studies
Flow velocity
Hydrogeology
Metronidazole
Oxidation
Oxidation-reduction reaction
Pharmaceutical industry wastes
Pharmaceuticals
Pretreatment
Pretreatment of water
Purification
Removal
Sewage
Soil Science & Conservation
Spectroscopy
Total oxygen demand
Wastewater treatment
Water Quality/Water Pollution
title Optimized Study and Column Experiments on Treatment Process of Metronidazole Pharmaceutical Wastewater by Microelectrolysis and Fenton Oxidation
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