Enhancement of UV disinfection of urine matrixes by electrochemical oxidation

Herraiz-Carboné, Miguel; Cotillas, Salvador; Lacasa, Engracia; Cañizares, Pablo; Sáez, Cristina

doi:10.1016/j.jhazmat.2020.124548

Cited by 28 publications

(17 citation statements)

References 64 publications

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“…Free and combined chlorine species are expected to be generated from the oxidation of chlorides contained in urine and the subsequent reaction with ammonium [23]. In addition, the MIKROZON® cell used in this work is specially designed for the electrochemical production of ozone during the electrolysis which can also contribute to the disinfection process [14,15].…”

Section: Resultsmentioning

confidence: 99%

“…Likewise, the experimental data were fitted to a first order kinetics model [23] and the resulting rate constants for urine (kU) and urine without chlorides (kUWC) were also compared throughout the ratio kU/kUWC. Values higher than 1 indicate that the disinfection process is more efficient by the combination of electrogenerated chlorine and ozone disinfectants whereas ratios lower than 1 suggest a more contribution of ozone on the disinfection process.…”

Section: Resultsmentioning

confidence: 99%

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Disinfection of urines using an electro-ozonizer

Herraiz-Carboné

Cotillas

Lacasa

et al. 2021

Electrochimica Acta

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Disinfection of urines using an electro-ozonizer

Herraiz-Carboné

Cotillas

Lacasa

et al. 2021

Electrochimica Acta

Self Cite

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“…( Herraiz-Carboné et al., 2020b ) reported that the electric energy consumption for UV assisted electrochemical oxidation using a BDD anode at the high applied current density of 50 A m −2 , is slightly higher than that required for the UV disinfection process (0.395 vs . 0.389 kWh m −3 order −1 ).…”

Section: Economic Aspects and Scale-up Of The Photo-assisted Eaopsmentioning

confidence: 99%

“…In terms of energy requirements for pathogen inactivation promoted by EAOPs, the specific electric energy (E EO ) in kWh m −3 order −1 , can be calculated using Eq. (36) , where E is the cell voltage (V), W lamp the power of the lamp (kW), I the current intensity (kA), t the operation time (h), V the volume (m 3 ) and C 0 and C f the initial and final pathogen concentration after 1 order of magnitude removal (CFU mL −1 ), respectively ( Herraiz-Carboné et al., 2020b ).

…”

Section: Economic Aspects and Scale-up Of The Photo-assisted Eaopsmentioning

confidence: 99%

“…The effectiveness of the EAOPs such as electrochemical oxidation ( Anfruns-Estrada et al., 2017 ; Bruguera-Casamada et al, 2016 , 2017 ; Candia-Onfray et al., 2018 ; Cano et al., 2016 ; Corona-Bautista et al., 2021 ; Cotillas et al, 2018 , 2020 ; Frontistis et al., 2017 ; Guitaya et al., 2015 ; Hernández-Pimentel et al., 2020 ; Herraiz-Carboné et al, 2020a , 2020b ; Medrano-Rodríguez et al., 2020 ; Mousset et al., 2018 ; Pacheco-Álvarez et al., 2019 ), electrocoagulation ( Anfruns-Estrada et al., 2017 ; Villalobos-Lara et al., 2021 ), electro-Fenton ( Campos et al., 2020 ; Droguett et al., 2020 ; Olvera-Vargas et al., 2019 ; Ren et al., 2020 ; Robles et al., 2020a ; Salazar et al., 2019 ; Thiam et al., 2020 ) and coupled EAOPs with other technologies ( Cotillas et al., 2016b ; Hashim et al., 2020 ; Jhones dos Santos et al., 2021 ; Llanos et al., 2015 ) has been proven by several research works worldwide on the inactivation of pathogens and the treatment of wastewater.…”

Section: Introductionmentioning

confidence: 99%

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Photo-assisted electrochemical advanced oxidation processes for the disinfection of aqueous solutions: A review

et al. 2021

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Disinfection is usually the final step in water treatment and its effectiveness is of paramount importance in ensuring public health. Chlorination, ultraviolet (UV) irradiation and ozone (O 3 ) are currently the most common methods for water disinfection; however, the generation of toxic by-products and the non-remnant effect of UV and O 3 still constitute major drawbacks. Photo-assisted electrochemical advanced oxidation processes (EAOPs) on the other hand, appear as a potentially effective option for water disinfection. In these processes, the synergism between electrochemically produced active species and photo-generated radicals, improve their performance when compared with the corresponding separate processes and with other physical or chemical approaches. In photo-assisted EAOPs the inactivation of pathogens takes place by means of mechanisms that occur at different distances from the anode, that is: (i) directly at the electrode’s surface (direct oxidation), (ii) at the anode’s vicinity by means of electrochemically generated hydroxyl radical species (quasi-direct), (iii) or at the bulk solution (away from the electrode surface) by photo-electrogenerated active species (indirect oxidation). This review addresses state of the art reports concerning the inactivation of pathogens in water by means of photo-assisted EAOPs such as photo-electrocatalytic process, photo-assisted electrochemical oxidation, photo-electrocoagulation and cathodic processes. By focusing on the oxidation mechanism, it was found that while quasi-direct oxidation is the preponderant inactivation mechanism, the photo-electrocatalytic process using semiconductor materials is the most studied method as revealed by numerous reports in the literature. Advantages, disadvantages, trends and perspectives for water disinfection in photo-assisted EAOPs are also analyzed in this work.

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Effect of electrode parameters in the electro‐production of reactive oxidizing species via boron‐doped diamond under batch mode

Abdelnabi

Theeb

Almomani

et al. 2022

Water Environment Research

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Ozone and hydroxyl radicals (•OH) are powerful reactive oxidizing species (ROS) that are commonly utilized in water disinfection. The electrochemical advanced oxidation process (EAOP) is often used to generate such oxidants, whereas optimizing its experimental setup and electrode parameters plays a crucial role in its performance. This research aims to find the optimal setup for ROS generation process from tap water via the boron‐doped diamond. The effect of electrode's active area, type of electrode substrates (mesh or sheet), type of mesh substrate (rolled and unrolled), and number of anodes and cathodes are examined. The results showed that the use of two long‐rolled BDD/Nb meshes as anode and one long‐rolled mesh as a cathode gives the optimal performance of electrolysis process at 15 V potential and 3 min. These results will provide a start for developing a cost accepted, health‐safe, household disinfection device that reduces susceptibility to human life‐threatening waterborne diseases. Practitioner Points This research aims to find the optimal setup for ROS generation process from tap water via the boron‐doped diamond. The effect of electrode's parameters on the electro‐production of ROS is examined. The best performance is achieved using rolled mesh electrodes. Two long‐rolled BDD/Nb meshes as anode electrodes and one long‐rolled mesh cathode electrode give the optimal electrolysis process performance.

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Enhancement of UV disinfection of urine matrixes by electrochemical oxidation

Cited by 28 publications

References 64 publications

Disinfection of urines using an electro-ozonizer

Disinfection of urines using an electro-ozonizer

Photo-assisted electrochemical advanced oxidation processes for the disinfection of aqueous solutions: A review

Effect of electrode parameters in the electro‐production of reactive oxidizing species via boron‐doped diamond under batch mode

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