A thin layer electrochemical cell for disinfection of water contaminated with Staphylococcus aureus

Gusmão, Isabel C. P.; Moraes, Peterson Bueno de; Bidóia, Edério Dino

doi:10.1590/s1517-83822009000300029

Cited by 7 publications

(4 citation statements)

References 22 publications

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“…The electroassisted photocatalytic treatment combined processes related to bacterial inactivation, such as the direct absorption of UV radiation by the cells and the cellular destruction by OH, with a powerful oxidizing agent generated by the degradation on the photocatalyst surface. Changes in the cell wall were therefore expected (Cho et al, 2011;Gusmão et al, 2009;Foster et al, 2011;Adhikari et al, 2015a;Grosser and Richardson, 2015). According to Matsunaga et al (1985), the microbial death is due to the oxidation of coenzyme A (CoA) by the positively charged gaps, leading to the formation of dimeric CoA.…”

Section: Ag þmentioning

confidence: 99%

Electrochemically assisted photocatalysis: Highly efficient treatment using thermal titanium oxides doped and non-doped electrodes for water disinfection

Santos

Claro

Montagnolli

et al. 2017

Journal of Environmental Management

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Electrochemically assisted photocatalysis (by electronic drainage) is a highly promising method for disinfection of water. In this research, the efficiency of photolytic oxidation using UV-A radiation and electrochemically assisted photocatalysis (with electric potential of 1.5 V) was studied by using electrodes prepared by thermal treatment and doped with silver, for inactivation of Escherichia coli and Staphylococcus aureus. The Chick-Watson microorganism inactivation model was applied and the electrical energy consumption of the process was calculated. It was observed no significant inactivation of microorganisms when UV-A light or electric potential were applied separately. However, the electrochemically assisted photocatalytic process, with Ag-doped electrode completely inactivated the microbial population after 10 (E. coli) and 60 min (S. aureus). The best performing non-doped electrodes achieved 52.74% (E. coli) and 44.09% (S. aureus) inactivation rates after 60 min. Thus, electrochemically assisted photocatalytic activity was not only effective for the inactivation of microorganisms, but also notably low on electrical energy consumption during the treatment due to small current and low electric potential applied.

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Section: Ag þmentioning

confidence: 99%

Electrochemically assisted photocatalysis: Highly efficient treatment using thermal titanium oxides doped and non-doped electrodes for water disinfection

Santos

Claro

Montagnolli

et al. 2017

Journal of Environmental Management

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“…CDI is an offshoot of the better known electrochemical oxidation, wherein an electric potential is used to produce short lived Reactive Oxygen Species (ROS, namely •OH, ClO − etc.) in water, which increases the microbial mortality, providing both primary, and residual disinfection mechanisms (Gusmão et al, 2009;Gil et al, 2019). However, unlike the electrochemical technique, it has been argued that since CDI uses a lower DC voltage, limited number of ROS species would be produced (Kim et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Disinfection of Bacteria in Water by Capacitive Deionization

et al. 2020

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Clean water is one of the primary UN sustainable development goals for 2,030 and sustainable water deionization and disinfection is the backbone of that goal. Capacitive deionization (CDI) is an upcoming technique for water deionization and has shown substantial promise for large scale commercialization. In this study, activated carbon cloth (ACC) electrode based CDI devices are used to study the removal of ionic contaminants in water and the effect of ion concentrations on the electrosorption and disinfection functions of the CDI device for mixed microbial communities in groundwater and a model bacterial strain Escherichia coli. Up to 75 % of microbial cells could be removed in a single pass through the CDI unit for both synthetic and groundwater, while maintaining the salt removal activity. Mortality of the microbial cells were also observed during the CDI cell regeneration and correlated with the chloride ion concentrations. The power consumption and salt removal capacity in the presence and absence of salt were mapped and shown to be as low as 0.1 kWh m −3 and 9.5 mg g −1 , respectively. The results indicate that CDI could be a viable option for single step deionization and microbial disinfection of brackish water.

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“…For a wide range of experimental conditions a good agreement between model prediction and experimental data was achieved, when a non-ideal flow behaviour was assumed as a combination of ideal flow reactors, bypass flow elements, and dead zones. The bacterial inactivation in the absence of chlorine compounds using a thin layer electrochemical cell with a dimensionally stable anode (70% TiO 2 -30% RuO 2 ) and a stainless steel 304 cathode was studied in [11] without the generation of chlorine. The procedure is efficient but requires the combination with other methods to fulfil the legal regulations.…”

Section: Introductionmentioning

confidence: 99%

Characterization of a bipolar parallel-plate electrochemical reactor for water disinfection using low conductivity drinking water

Henquín

Colli

Bergmann

et al. 2013

Chemical Engineering and Processing: Process Intensification

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A thin layer electrochemical cell for disinfection of water contaminated with Staphylococcus aureus

Cited by 7 publications

References 22 publications

Electrochemically assisted photocatalysis: Highly efficient treatment using thermal titanium oxides doped and non-doped electrodes for water disinfection

Electrochemically assisted photocatalysis: Highly efficient treatment using thermal titanium oxides doped and non-doped electrodes for water disinfection

Disinfection of Bacteria in Water by Capacitive Deionization

Characterization of a bipolar parallel-plate electrochemical reactor for water disinfection using low conductivity drinking water

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