Rapid Degradation of Carbamazepine in Wastewater Using Dielectric Barrier Discharge-Assisted Fe 3 ⁺/Sodium Sulfite Oxidation

Wei Wei (), Yulong Zhu, Zhenghan Zhou, Yuxiang Dong, Ziyan Ni, Zhongqi Jiang, Zhiquan Liu, Zhiyan Chen, Xiachun Wu, Qiyuan Zheng and Shuguang Zhu
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Wei Wei: Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse, School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China
Yulong Zhu: Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse, School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China
Zhenghan Zhou: Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse, School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China
Yuxiang Dong: Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse, School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China
Ziyan Ni: Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse, School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China
Zhongqi Jiang: Department of Municipal Engineering, School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China
Zhiquan Liu: Department of Municipal Engineering, School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China
Zhiyan Chen: Department of Municipal Engineering, School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China
Xiachun Wu: Anhui Shunyu Water Co., Ltd., Hefei 231131, China
Qiyuan Zheng: Anhui Shunyu Water Co., Ltd., Hefei 231131, China
Shuguang Zhu: Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse, School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China

Sustainability, 2024, vol. 16, issue 23, 1-16

Abstract: The discharge of medical and domestic wastewater has resulted in increasing levels of pharmaceutical pollutants in water bodies. We combined dielectric barrier discharge (DBD) technology with an Fe 3 ⁺/sodium sulfite oxidation system to address the limitations associated with traditional water treatment technologies in removing carbamazepine, exploring the application efficacy and mechanisms of this approach in carbamazepine degradation. Under optimized experimental conditions, our system achieved a 97% degradation efficiency for carbamazepine within 4 min, significantly outperforming both DBD and sodium sulfite standalone systems. Using response surface methodology to optimize experimental parameters, the effects of sodium sulfite concentration, pH, and Fe 3 ⁺ concentration on degradation efficiency were assessed. Under optimal conditions, the system’s degradation efficiency was 2.5 times higher than that of individual systems. Hydroxyl and sulfate radicals contributed 65% and 85%, respectively, to carbamazepine degradation, while superoxide radicals contributed only 30%. The study demonstrated that this system effectively breaks down the molecular structure of carbamazepine. Eight primary intermediate degradation products were identified, and, as degradation progressed, the concentrations of these intermediates gradually decreased, ultimately achieving a mineralization rate exceeding 85%. This study not only provides an effective technical solution for rapidly treating recalcitrant organic pollutants in water but also offers new insights for environmental protection and the sustainable use of water resources while providing theoretical and experimental data for future related research.

Keywords: carbamazepine degradation; wastewater treatment; medical waste treatment; media-blocking discharge plasma technology; dielectric discharge barrier; transition metal oxidation system (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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