Bio-electro-Fenton system for enhanced estrogens degradation

Xu, Nan; Zhang, Yingyuan; Tao, Hu-Chun; Zhou, Shungui; Zeng, Yaqiong

doi:10.1016/j.biortech.2013.03.157

Cited by 77 publications

(36 citation statements)

References 31 publications

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“…33 In our previous study, 22 the total sorption of E2 in the system with Fe@Fe 2 O 3 /NCF cathode under open circuit condition was up to 72.4%, higher than in the present study, while the iron content of the cathode in that study was more than three times higher than in the present study as well. In Reactor B, a total of 14.1% E2 were removed due to the sorption both by the surface of chamber and by the PEM.…”

Section: Contributions Of Sorption To E2 Removalcontrasting

confidence: 69%

“…Effects of external load on E2 removal. 22 This cathode was prepared with 0.270 g FeCl 3 $6H 2 O and 2.25 g NaBH 4 following the procedures described in Zhuang et al, 14 which resulted in 5.15 AE 0.042 mg iron on the cathode. 28,29 To reveal how external resistance affects E2 removal, the BEF system was operated under different external resistance, i.e.…”

Section: Optimization Of the Bef Systemmentioning

confidence: 99%

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Removal of 17β-estrodial in a bio-electro-Fenton system: contribution of oxidation and generation of hydroxyl radicals with the Fenton reaction and carbon felt cathode

Zeng

et al. 2015

RSC Adv.

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A bio-electro-Fenton (BEF) system equipped with a Fe@Fe 2 O 3 /non-catalyzed carbon felt (NCF) cathode was optimized, and the generation of hydroxyl radicals was confirmed for E2 removal. External resistance was the most significant factor influencing E2 removal. When the external resistance was close to the internal one, both the Fe@Fe 2 O 3 /NCF and NCF systems removed over 90% of E2. Sorption experiments suggested that oxidation played a major role in E2 removal instead of cathode sorption. Up to 0.54 mmol L À1 of hydroxyl radicals were detected in the Fe@Fe 2 O 3 /NCF system, mostly produced via the Fenton reaction. While in the NCF system, hydroxyl radicals were also detectable at around 0.059 mmol L À1 , possibly produced through the activation of H 2 O 2 by persistent free radicals contained in the combustion-generated carbon felt. Although the BEF system was confirmed to possess a much stronger oxidation capacity, a microbial fuel cell equipped with NCF is already efficient in removing trace amounts of organic pollutants.

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Section: Contributions Of Sorption To E2 Removalcontrasting

confidence: 69%

Section: Optimization Of the Bef Systemmentioning

confidence: 99%

Removal of 17β-estrodial in a bio-electro-Fenton system: contribution of oxidation and generation of hydroxyl radicals with the Fenton reaction and carbon felt cathode

Zeng

et al. 2015

RSC Adv.

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“…As a result, electricity is generated and the H 2 O 2 produced in-situ in the cathode reacts with Fe 2+ to form •OH, a very reactive compound effective for water purification (eq. 2) [9,18]. Latterly, it was found that the treatment capacity can be boosted by supplying small amounts of electricity (0.2-1.0 V) to the system, due to the improved H 2 O 2 production [19].…”

Section: Introductionmentioning

confidence: 99%

Microbial electrolytic disinfection process for highly efficient Escherichia coli inactivation

Zhou

Huang

et al. 2018

Chemical Engineering Journal

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Water quality deterioration caused by a wide variety of recalcitrant organics and pathogenic microorganisms has become a serious concern worldwide. Bio-electro-Fenton systems have been considered as cost-effective and highly efficient water treatment platform technology. While it has been extensively studied for recalcitrant organics removal, its application potential towards water disinfection (e.g., inactivation of pathogens) is still unknown. This study investigated the inactivation of Escherichia coli in a microbial electrolysis cell based bio-electro-Fenton system (renamed as microbial electrolytic-Fenton cell) with the aim to broad the application of microbial electrochemistry. Results showed that a 4-log reduction of Escherichia coli (10 7 to hundreds CFU/mL) was achieved with an external applied voltage of 0.2 V, 0.3 mM Fe 2+ and cathodic pH of 3.0. However, non-notable inactivation was observed in the control experiments without external voltage or Fe 2+ dose. The disinfection effect was enhanced when cathode air flow rate increased from 7 to 41 mL/min and was also in proportion to the increase of Fe 2+ concentration from 0.15 to 0.45 mmol/mL. Fatal cell membrane destruction by •OH was identified as one potential mechanism for disinfection. This study successfully demonstrated the feasibility of bio-electro-Fenton process for pathogens inactivation, which offers insight for the future development of sustainable, efficient, and cost-effective biological water treatment technology.

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“…The yield of sludge and its composition depend upon the proportion and the volumes of the added reagents. To minimize the sludge production in the Fenton process it is possible to use heterogeneous catalysts and reuse the iron from the sludges[63]. In the case of heterogeneous catalysts natural minerals have been used, clays containing iron, iron immobilized in solid supports and zero-valent iron[63] Yoo et al (2001).…”

mentioning

confidence: 99%

“…To minimize the sludge production in the Fenton process it is possible to use heterogeneous catalysts and reuse the iron from the sludges[63]. In the case of heterogeneous catalysts natural minerals have been used, clays containing iron, iron immobilized in solid supports and zero-valent iron[63] Yoo et al (2001). suggested the reutilization of the produced sludges from Fenton oxidation in a coagulation process[64].…”

mentioning

confidence: 99%

Bio-electro-Fenton process for the degradation of Non-Steroidal Anti-Inflammatory Drugs in wastewater

Nadais

Alves

et al. 2018

Chemical Engineering Journal

112

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Bio-electro-Fenton system for enhanced estrogens degradation

Cited by 77 publications

References 31 publications

Removal of 17β-estrodial in a bio-electro-Fenton system: contribution of oxidation and generation of hydroxyl radicals with the Fenton reaction and carbon felt cathode

Removal of 17β-estrodial in a bio-electro-Fenton system: contribution of oxidation and generation of hydroxyl radicals with the Fenton reaction and carbon felt cathode

Microbial electrolytic disinfection process for highly efficient Escherichia coli inactivation

Bio-electro-Fenton process for the degradation of Non-Steroidal Anti-Inflammatory Drugs in wastewater

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