Efficient treatment of swimming pool water by photoelectrocatalytic ozonation: Inactivation of Candida parapsilosis and mineralization of Benzophenone-3 and urea

Kim, Joaquim Yuji Usukura; Bessegato, Guilherme G.; Souza, B.C. de; Silva, Josiel José da; Zanoni, María Valnice Boldrin

doi:10.1016/j.cej.2019.122094

Cited by 31 publications

(19 citation statements)

References 32 publications

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“…For example, back-face irradiation should be used where the water has high turbidity or low UV transmission. Another key parameter of any PEC reactor is the irradiation source, such as UV fluorescent lamps [46,47]; alternatively, more environmentally friendly and efficient UV LEDs have been used but are more expensive [48,49]. The advantage of using artificial irradiation is the ability to operate at any time with a uniform and consent photon flux.…”

Section: Photoelectrocatalytic Reactor Designmentioning

confidence: 99%

A Review of Photoelectrocatalytic Reactors for Water and Wastewater Treatment

McMichael

Fernández‐Ibáñez

Byrne

2021

Water

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The photoexcitation of suitable semiconducting materials in aqueous environments can lead to the production of reactive oxygen species (ROS). ROS can inactivate microorganisms and degrade a range of chemical compounds. In the case of heterogeneous photocatalysis, semiconducting materials may suffer from fast recombination of electron–hole pairs and require post-treatment to separate the photocatalyst when a suspension system is used. To reduce recombination and improve the rate of degradation, an externally applied electrical bias can be used where the semiconducting material is immobilised onto an electrically conducive support and connected to a counter electrode. These electrochemically assisted photocatalytic systems have been termed “photoelectrocatalytic” (PEC). This review will explain the fundamental mechanism of PECs, photoelectrodes, the different types of PEC reactors reported in the literature, the (photo)electrodes used, the contaminants degraded, the key findings and prospects in the research area.

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Section: Photoelectrocatalytic Reactor Designmentioning

confidence: 99%

A Review of Photoelectrocatalytic Reactors for Water and Wastewater Treatment

McMichael

Fernández‐Ibáñez

Byrne

2021

Water

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“…The same worker showed time taken in inactivation of E.Coli is a function of pH, the resistance of germ is highest at a pH of 7.5 -8. Figure (3). The redox potential of a solution of Ozone is dependent upon the pH, it drops sharply below 0.35 g/m 3 .…”

Section: Figure (1) Purification Steps Of Recycled Water In Swimming Poolmentioning

confidence: 94%

Efficient Water Treatment of Swimming Pools Using Ozone

Amin

2021

Egypt. J. Chem.

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Swimming pools are common source of pollution especially public one. Recycled water should be chemically treated and microbial decontaminated. Water to be free of destructive substances, microscopic organisms, infections, green growth, pathogens, and reasonable for utilize by swimmers. This means that expansive particles are reduced to smaller volumes, which led to decay more efficiently through a channel. Since the natural matters produced a bacterial substitute, it will cause an increase in bacterial growth within the system. The regrowth of microscopic species in a conveyance framework is a negative effect. By injecting ozone into a sand channel, this will be converted into a positive effect. According to this research, ionization can improve channel performance. Ozone increases material biodegradability and microbial growth while also increasing oxygen concentration in the channel. When ozone is applied to natural carbon as total organic carbon (TOC) expulsion in a sand channel, it can be increased by up to 35%.

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“…In a more sophisticated approach, an indirect photo-electrocatalytic process assisted by O 3 , using a TiO 2 NTN photo-anode and DSA cathode, was found to completely inactivate C. parapsilosis in swimming pool water within 45 min of treatment. The study carried out by Kim et al. (2019) found that the efficient inactivation process was based on the generation of ROS which were provided by the photo-electrocatalytic oxidation of water, O 3 production by photo-generated electrons at the TiO 2 surface and the O 3 reaction with water and UV photons ( Kim et al., 2019 ).…”

Section: Indirect Oxidationmentioning

confidence: 99%

“…The study carried out by Kim et al. (2019) found that the efficient inactivation process was based on the generation of ROS which were provided by the photo-electrocatalytic oxidation of water, O 3 production by photo-generated electrons at the TiO 2 surface and the O 3 reaction with water and UV photons ( Kim et al., 2019 ).…”

Section: Indirect Oxidationmentioning

confidence: 99%

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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Efficient treatment of swimming pool water by photoelectrocatalytic ozonation: Inactivation of Candida parapsilosis and mineralization of Benzophenone-3 and urea

Cited by 31 publications

References 32 publications

A Review of Photoelectrocatalytic Reactors for Water and Wastewater Treatment

A Review of Photoelectrocatalytic Reactors for Water and Wastewater Treatment

Efficient Water Treatment of Swimming Pools Using Ozone

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

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