Inactivation behavior and intracellular changes in Escherichia coli during electro-oxidation process using Ti/Sb–SnO2/PbO2 anode: Elucidation of the disinfection mechanism

Rathinavelu, Sasikaladevi; Divyapriya, Govindaraj; Joseph, Angel; Nambi, Indumathi M.; Muthukrishnan, Anantha-Barathi; Jayaraman, Guhan

doi:10.1016/j.envres.2022.112749

Cited by 25 publications

(4 citation statements)

References 72 publications

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“…Finally, the analysis of microbiological contaminants in the effluent was performed, showing that the simultaneous combination of EO and O 3 allowed for the total inactivation/elimination of both E. coli and Total Flora, in a maximum time of 60 min. The obtained results confirmed not only the high disinfection performance of the O 3 treatment, one of the most used technologies for disinfection [54], but also the promising use of electrochemical technologies for disinfection purposes [55,56] and of their combination [45]. Residual concentrations of DO 3 and DO 2 were also measured at the final effluent to check the feasibility of a possible recirculation to the biological aerobic treatment.…”

Section: Er Review 26 Of 31supporting

confidence: 69%

Pharmaceuticals Removal by Ozone and Electro-Oxidation in Combination with Biological Treatment

Audino,

Arboleda,

Petrovic

et al. 2023

Water

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This study investigated the efficiency of two advanced oxidation processes (AOPs), ozonation (O3), and electrochemical oxidation (EO), applied individually or in combination, in the removal of contaminants of emerging concern (CECs) contained in hospital wastewaters, focusing on pharmaceuticals. The optimisation of the single technologies was performed using synthetic wastewater composed of four refractory pharmaceuticals, (carbamazepine-CBZ, lorazepam-LZP, ketoprofen-KTP, 10,11-epoxicarbamazepine-E-CBZ), first alone and then in mixture, in an initial concentration of 1 mg L−1 each. Once the best operational conditions for EO and O3 were defined, their combination (both simultaneous and sequential) was evaluated for the mixture of the selected pharmaceuticals. The treatment solution that showed the best performance was the simultaneous combination of O3 and EO. This treatment was validated using real hospital wastewater previously treated through a moving bed biofilm reactor (MBBR), evaluating its viability by testing the toxicity of the final effluent via Vibrio fischeri inhibition tests. The obtained results showed that the simultaneous combination of O3 and EO as the polishing step after a biological treatment is a very promising solution for hospital wastewater treatment, allowing for obtaining a non-toxic effluent and full degradation of refractory compounds. The disinfection potential of the proposed AOP was also assessed by determining Escherichia coli inactivation potential.

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Section: Er Review 26 Of 31supporting

confidence: 69%

Pharmaceuticals Removal by Ozone and Electro-Oxidation in Combination with Biological Treatment

Audino,

Arboleda,

Petrovic

et al. 2023

Water

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“…The reactive oxidants are responsible for the degradation of organic pollutants in the electrochemical oxidation process [ 68 , 69 ]. The ESR technique was applied to reveal the possible reactive oxidant species formed in the electrochemical system with Y/3DG-PbO 2 -15 anode, in which the DMPO was used as spin-trapping reagent of •OH, •SO 4 2– and •O 2 – radicals.…”

Section: Resultsmentioning

confidence: 99%

Y-mediated optimization of 3DG-PbO2 anode for electrochemical degradation of PFOS

Duan,

Ning,

Wang

et al. 2023

BMC Chemistry

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In our previous study, the three-dimensional graphene-modified PbO2 (3DG-PbO2) anode was prepared for the effective degradation of perfluorooctanesulfonat (PFOS) by the electrochemical oxidation process. However, the mineralization efficiency of PFOS at the 3DG-PbO2 anode still needs to be further improved due to the recalcitrance of PFOS. Thus, in this study, the yttrium (Y) was doped into the 3DG-PbO2 film to further improve the electrochemical activity of the PbO2 anode. To optimize the doping amount of Y, three Y and 3DG codoped PbO2 anodes were fabricated with different Y3+ concentrations of 5, 15, and 30 mM in the electroplating solution, which were named Y/3DG-PbO2-5, Y/3DG-PbO2-15 and Y/3DG-PbO2-30, respectively. The results of morphological, structural, and electrochemical characterization revealed that doping Y into the 3DG-PbO2 anode further refined the β-PbO2 crystals, increased the oxygen evolution overpotential and active sites, and reduced the electron transfer resistance, resulting in a superior electrocatalytic activity. Among all the prepared anodes, the Y/3DG-PbO2-15 anode exhibited the best activity for electrochemical oxidation of PFOS. After 120 min of electrolysis, the TOC removal efficiency was 80.89% with Y/3DG-PbO2-15 anode, greatly higher than 69.13% with 3DG-PbO2 anode. In addition, the effect of operating parameters on PFOS removal was analyzed by response surface, and the obtained optimum values of current density, initial PFOS concentration, pH, and Na2SO4 concentration were 50 mA/cm2, 12.21 mg/L, 5.39, and 0.01 M, respectively. Under the optimal conditions, the PFOS removal efficiency reached up to 97.16% after 40 min of electrolysis. The results of the present study confirmed that the Y/3DG-PbO2 was a promising anode for electrocatalytic oxidation of persistent organic pollutants.

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“…This might be due to the catalytic effect of noble metal oxides on active oxygen and active chlorine, which greatly improves the disinfection capability. It has been reported that titanium electrodes coated with metal oxides are currently mature and stable anode materials (Rathinavelu et al, 2022). When Ti/ Sb-SnO 2 /PbO 2 is used as an anode and the applied current density is 30 mA•cm −2 , wastewater disinfection can be achieved within 12 min, and the energy consumption is only 4.978 kw h m −3 .…”

Section: Electrochemical Oxidationmentioning

confidence: 99%

“…In addition, the ratio of electrode area to flow rate is the ratio of anode working area to wastewater volume, and the appropriate ratio is very important for sterilization. In particular, the increase of dissolved oxygen can increase the concentration of reactive oxygen species in wastewater, thereby promoting to kill pathogenic microorganisms (Rathinavelu et al, 2022).…”

Section: Electrochemical Oxidationmentioning

confidence: 99%

Research progress of electrochemical oxidation and self-action of electric field for medical wastewater treatment

Tanida

Zheng²,

Cai³

et al. 2023

Front. Microbiol.

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A large number of pathogenic microorganisms exist in medical wastewater, which could invade the human body through the water and cause harm to human health. With the global pandemic coronavirus (COVID-19), public health safety become particularly important, and medical wastewater treatment is an important part of it. In particular, electrochemical disinfection technology has been widely studied in medical wastewater treatment due to its greenness, high efficiency, convenient operation, and other advantages. In this paper, the development status of electrochemical disinfection technology in the treatment of medical wastewater is reviewed, and an electrochemical three-stage disinfection system is proposed for the treatment of medical wastewater. Moreover, prospects for the electrochemical treatment of medical wastewater will be presented. It is hoped that this review could provide insight and guidance for the research and application of electrochemical disinfection technology to treat medical wastewater.

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Inactivation behavior and intracellular changes in Escherichia coli during electro-oxidation process using Ti/Sb–SnO2/PbO2 anode: Elucidation of the disinfection mechanism

Cited by 25 publications

References 72 publications

Pharmaceuticals Removal by Ozone and Electro-Oxidation in Combination with Biological Treatment

Pharmaceuticals Removal by Ozone and Electro-Oxidation in Combination with Biological Treatment

Y-mediated optimization of 3DG-PbO2 anode for electrochemical degradation of PFOS

Research progress of electrochemical oxidation and self-action of electric field for medical wastewater treatment

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