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03422nam a2200625Ia 4500 |
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10-3390-w14071044 |
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220425s2022 CNT 000 0 und d |
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|a 20734441 (ISSN)
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|a Construction of Novel Electro-Fenton Systems by Magnetically Decorating Zero-Valent Iron onto RuO2-IrO2/Ti Electrode for Highly Efficient Pharmaceutical Wastewater Treatment
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|b MDPI
|c 2022
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|z View Fulltext in Publisher
|u https://doi.org/10.3390/w14071044
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|a The Electro-Fenton (E-Fenton) technique has shown great potential in wastewater treatment, while the sustainable and continuing supply of Fe2+ remains challenging. Herein, we demonstrate the construction of a novel E-Fenton system by magnetically decorating zero-valent iron (ZVI) onto a RuO2-IrO2/Ti (ZVI-RuO2-IrO2/Ti) electrode for high-efficient treatment of pharmaceutical wastewater, which is considerably refractory and harmful to conventional biological processes. By using ZVI as a durable source of Fe(II) irons, 78.69% of COD and 76.40% of TOC may be rapidly removed by the developed ZVI-RuO2-IrO2/Ti electrode, while the ZVI-RuO2-IrO2/Ti electrode using ZVI only reduces 35.64% of COD under optimized conditions at initial COD and TOC values of 5500 mg/L and 4300 mg/L, respectively. Moreover, the increase in BOD5/COD from 0.21 to 0.52 highlights the enhanced biodegradability of the treated effluent. The analysis of a simultaneously formed precipitation on electrodes suggests that the coagulation process dominated by Fe3+/Fe2+ also plays a non-negligible role in pharmaceutical wastewater treatment. In addition, the monitoring of the evolution of nitrogen elements and the formation of by-products in the E-Fenton process verifies its great capacity toward those organic pollutants found in pharmaceutical wastewater. Our study offers a practical solution for enhancing the performance of E-Fenton systems, and effectively treating refractory pharmaceutical wastewater. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
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|a Biodegradability
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|a Biological process
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|a Chemical oxygen demand
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|a Chemicals removal (water treatment)
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|a coagulation
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|a drug
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|a E-Fenton process
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|a Efficient treatment
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|a Effluents
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|a electrode
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|a Electrodes
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|a Electro-fenton
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|a Electro-Fenton process
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|a electro-oxidation
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|a Electrooxidation
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|a Electrooxidations
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|a Fenton system
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|a High efficient
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|a Iron compounds
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|a iron nanoparticle
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|a Organic pollutants
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|a oxidation
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|a pharmaceutical wastewater
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|a Pharmaceutical wastewater
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|a pollutant removal
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|a Reclamation
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|a Refractory materials
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|a Ruthenium compounds
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|a Ti electrode
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|a wastewater
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|a wastewater treatment
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|a Wastewater treatment
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|a zero-valent iron
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|a Zero-valent iron
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|a Deng, M.
|e author
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|a Gong, S.
|e author
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|a Liu, G.
|e author
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|a Petru, M.
|e author
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|a Sun, D.
|e author
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|a Wu, K.
|e author
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|a Yang, T.
|e author
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|a Yu, D.
|e author
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|t Water (Switzerland)
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