Simultaneous removal of tetracycline and disinfection by a flow-through electro-peroxone process for reclamation from municipal secondary effluent

Zhang, Yinqiao; Zuo, Sijin; Zhang, Ying; Ren, Gang; Pan, Yuwei; Zhang, Qizhan; Zhou, Minghua

doi:10.1016/j.jhazmat.2019.02.005

Cited by 53 publications

(11 citation statements)

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“…The energy consumption for the electrochemical oxidation of TC was 0.25 kWh m −3 at an optimal applied voltage of −2.5 V with a corresponding current of 0.002 A at pH 6.7. This was competitive with state-of-the-art electrochemical processes, which use 0.1−40 kWh m −3 , 49 and even advanced oxidation processes (AOPs) such as electrolysis with O 3 (0.47 kWh m −3 for TC), 50 photo-Fenton using UV/ pre-Fe 0 /H 2 O 2 (1.22 kWh m −3 for TC), 51 and electro-Fenton with FeOCl (0.336 kWh m −3 for TC). 52 It is noted that these results were obtained under different operational conditions, which may influence the apparent power consumption levels, and further investigation is essential to calculate accurately the energy consumption of these processes.…”

mentioning

confidence: 99%

Supported Atomically-Precise Gold Nanoclusters for Enhanced Flow-through Electro-Fenton

Liu

Yao

et al. 2020

Environ. Sci. Technol.

124

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Gold (Au) has been considered catalytically inert for decades, but recent reports have described the ability of Au nanoparticles to catalyze H 2 O 2 decomposition in the Haber−Weiss cycle. Herein, the design and demonstration of a flow-through electro-Fenton system based on an electrochemical carbon nanotube (CNT) filter functionalized with atomically precise Au nanoclusters (AuNCs) is described. The functionality of the device was then tested for its ability to catalyze antibiotic tetracycline degradation. In the functional filters, the Au core of AuNCs served as a high-performance Fenton catalyst; while the AuNCs ligand shells enabled CNT dispersion in aqueous solution for easy processing. The hybrid filter enabled in situ H 2 O 2 production and catalyzed the subsequent H 2 O 2 decomposition to HO•. The catalytic function of AuNCs lies in their ability to undergo redox cycling of Au + /Au 0 under an electric field. The atomically precise AuNCs catalysts demonstrated superior catalytic activity to larger nanoparticles; while the flow-through design provided convection-enhanced mass transport, which yielded a superior performance compared to a conventional batch reactor. The adsorption behavior and decomposition pathway of H 2 O 2 on the filter surfaces were simulated by density functional theory calculations. The research outcomes provided atomic-level mechanistic insights into the Aumediated Fenton reaction.

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mentioning

confidence: 99%

Supported Atomically-Precise Gold Nanoclusters for Enhanced Flow-through Electro-Fenton

Liu

Yao

et al. 2020

Environ. Sci. Technol.

124

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“…This process was found also cost-effective and promising for simultaneous tetracycline removal and disinfection of municipal secondary effluents. The main disinfection by-products such as trihalomethanes, haloacetonitrile and halonitromethanes were particularly much lower than the WHO's thresholds for drinking water [432].…”

Section: Electro-peroxonementioning

confidence: 78%

Nanostructured electrodes for electrocatalytic advanced oxidation processes: From materials preparation to mechanisms understanding and wastewater treatment applications

Oturan

Zhou

et al. 2021

Applied Catalysis B: Environmental

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120

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“…The supernatant was taken at regular intervals after a certain reaction time and analysed to determine its COD and BOD 5 values, respectively, in order to observe the changes in B/C values before and after treatment. The mixture of oxygen and ozone (1 g/L) from the ozone generator was passed into the 250 mL petrochemical wastewater water sample [19]. Different intake air flows were used to oxidize petrochemical wastewater for a certain period of time in an environment of 25 • C. The COD and BOD 5 values were measured by taking samples regularly.…”

Section: Methodsmentioning

confidence: 99%

Comparison of Fenton and Ozone Oxidation for Pretreatment of Petrochemical Wastewater: COD Removal and Biodegradability Improvement Mechanism

et al. 2022

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Cost-effective pretreatment of highly concentrated and bio-refractory petrochemical wastewater to improve biodegradability is of significant importance, but remains challenging. This study compared the pretreatment of petrochemical wastewater by two commonly used chemical advanced oxidation technologies (Fenton and ozone oxidation), and the mechanisms of biodegradability improvement of pretreated wastewater were explored. The obtained results showed that in the Fenton oxidation system, the COD removal of petrochemical wastewater was 89.8%, BOD5 decreased from 303.66 mg/L to 155.49 mg/L, and BOD5/COD (B/C) increased from 0.052 to 0.62 after 60 min under the condition of 120 mg/L Fe2+ and 500 mg/L H2O2, with a treatment cost of about 1.78 $/kgCOD. In the ozone oxidation system, the COD removal of petrochemical wastewater was 59.4%, BOD5 increased from 127.86 mg/L to 409.28 mg/L, and B/C increased from 0.052 to 0.41 after 60 min at an ozone flow rate of 80 mL/min with a treatment cost of approximately 1.96 $/kgCOD. The petrochemical wastewater treated by both processes meets biodegradable standards. The GC–MS analysis suggested that some refractory pollutants could be effectively removed by ozone oxidation, but these pollutants could be effectively degraded by hydroxyl radicals (•OH) produced by the Fenton reaction. In summary, compared with ozone oxidation, petrochemical wastewater pretreated with Fenton oxidation had high COD removal efficiency and biodegradability, and the treatment cost of Fenton oxidation was also lower than that of ozone oxidation.

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Simultaneous removal of tetracycline and disinfection by a flow-through electro-peroxone process for reclamation from municipal secondary effluent

Cited by 53 publications

References 50 publications

Supported Atomically-Precise Gold Nanoclusters for Enhanced Flow-through Electro-Fenton

Supported Atomically-Precise Gold Nanoclusters for Enhanced Flow-through Electro-Fenton

Nanostructured electrodes for electrocatalytic advanced oxidation processes: From materials preparation to mechanisms understanding and wastewater treatment applications

Comparison of Fenton and Ozone Oxidation for Pretreatment of Petrochemical Wastewater: COD Removal and Biodegradability Improvement Mechanism

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