Ozone-based water treatment (O3, O3/UV, O3/H2O2) for removal of organic micropollutants, bacteria inactivation and regrowth prevention

Gorito, Ana M.; Pesqueira, Joana F.J.R.; Moreira, Nuno F.F.; Ribeiro, Ana R.; Pereira, M.F.R.; Nunes, Olga C.; Almeida, C. Marisa R.; Silva, Adrián M.T.

doi:10.1016/j.jece.2021.105315

Cited by 72 publications

(16 citation statements)

References 71 publications

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“…Over time, different treatments have been used for dye removal, including physical methods, such as filtration, flocculation and irradiation, and other conventional chemical methods, such as advanced oxidation processes, electrochemical degradation or ozonation [1,[10][11][12]. The problem with these treatments lies in their affordability and efficiency.…”

Section: Introductionmentioning

confidence: 99%

Cellulose Nanofiber-Based Aerogels from Wheat Straw: Influence of Surface Load and Lignin Content on Their Properties and Dye Removal Capacity

et al. 2022

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Water pollution is one of the most serious problems worldwide. Nanocellulose-based aerogels usually show excellent adsorption capacities due to their high aspect ratio, specific surface area and surface charge, making them ideal for water purification. In this work, (ligno)cellulose nanofibers (LCNFs/CNFs) from wheat straw residues were obtained using two types of pre-treatments: mechanical (Mec) and TEMPO-mediated oxidization (TO), to obtain different consistency (0.2, 0.4, 0.6 and 0.8) bioaerogels, and their adsorption capacities as dye removers were further studied. The materials were characterized in terms of density, porosity and mechanical properties. An inversely proportional relationship was observed between the consistencies of the aerogels and their achieved densities. Despite the increase in density, all samples showed porosities above 99%. In terms of mechanical properties, the best results were obtained for the 0.8% consistency LCNF and CNF-Mec aerogels, reaching 67.87 kPa and 64.6 kPa for tensile strength and Young’s modulus, respectively. In contrast, the adsorption capacity of the aerogels was better for TEMPO-oxidized aerogels, reaching removal rates of almost 100% for the CNF-TO5 samples. Furthermore, the residual lignin content in LCNF-Mec aerogels showed a great improvement in the removal capacity, reaching rates higher than 80%, further improving the cost efficiency of the samples due to the reduction in chemical treatments.

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Section: Introductionmentioning

confidence: 99%

Cellulose Nanofiber-Based Aerogels from Wheat Straw: Influence of Surface Load and Lignin Content on Their Properties and Dye Removal Capacity

et al. 2022

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“…The presence of organic matter can cause a severe reduction of O 3 in water [42][43][44], due to the rapid action of this agent with the aqueous compounds. However, it is precisely for this reason that O 3 (in its gas form) is widely used in the treatment of wastewater [40,45,46]-for example, reacting with the dirtiness by the direct action of molecular O 3 or by indirect reaction of the radical OH − [32,46]. On the other hand, during comparisons with the two types of water, the stability of O 3 in cold tap water was higher than that of the ultrapure water at the same temperature.…”

Section: O 3 Stability In Watermentioning

confidence: 99%

“…The antimicrobial action of O 3 herein showed is related to its powerful oxidizing action. O 3 has been widely used as an antimicrobial, in both its gaseous and aqueous form, due to its wide range of microbiological, cleaning, and metabolic activities [6,13,15,16,24,34,45,52,53]. The antimicrobial action of O 3 is related to its powerful oxidizing action.…”

Section: Biocidal Effect Of Ozonized Tap Watermentioning

confidence: 99%

Ozonized Water in Microbial Control: Analysis of the Stability, In Vitro Biocidal Potential, and Cytotoxicity

Santos

Silva

Oliveira

et al. 2021

Biology

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O3 dissolved in water (or ozonized water) has been considered a potent antimicrobial agent, and this study aimed to test this through microbiological and in vitro assays. The stability of O3 was accessed following modifications of the physicochemical parameters of water, such as the temperature and pH, with or without buffering. Three concentrations of O3 (0.4, 0.6, and 0.8 ppm) dissolved in water were tested against different microorganisms, and an analysis of the cytotoxic effects was also conducted using the human ear fibroblast cell line (Hfib). Under the physicochemical conditions of 4 °C and pH 5, O3 remained the most stable and concentrated compared to pH 7 and water at 25 °C. Exposure to ozonized water resulted in high mortality rates for Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, Enterococcus faecalis, and Candida albicans. Scanning electron micrograph images indicate that the effects on osmotic stability due to cell wall lysis might be one of the killing mechanisms of ozonized water. The biocidal agent was biocompatible and presented no cytotoxic effect against Hfib cells. Therefore, due to its cytocompatibility and biocidal action, ozonized water can be considered a viable alternative for microbial control, being possible, for example, its use in disinfection processes.

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“…The perspectives in the future to full-scale treatment for the production of drinkable water are very promising when using sonocatalysis ( Abdurahman et al, 2021 ), heterogeneous photocatalytic ( Garcia-Muñoz et al, 2020 ), Fenton ( Qian et al, 2020 ), photo-Fenton ( Garcia-Muñoz et al, 2020 ), electro-Fenton ( Olvera-Vargas et al, 2021 ), electrochemical oxidation UV-based processes as ultraviolet activation with hydrogen peroxide (UV/H 2 O 2 ) ( Lee et al, 2021 ), and UV with ozone (UV/O 3 ) ( Gorito et al, 2021 ) because these processes presented extremely successful results in the removal of pharmaceutical compounds at low concentrations.…”

Section: Photomediated and Advanced Oxidative Processes For Removing Drugs From The Kit-covidmentioning

confidence: 99%

Photo-mediated and advanced oxidative processes applied for the treatment of effluents with drugs used for the treatment of early COVID-19: Review

Albornoz

Soroka

Silva

2021

Environmental Advances

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Ozone-based water treatment (O3, O3/UV, O3/H2O2) for removal of organic micropollutants, bacteria inactivation and regrowth prevention

Cited by 72 publications

References 71 publications

Cellulose Nanofiber-Based Aerogels from Wheat Straw: Influence of Surface Load and Lignin Content on Their Properties and Dye Removal Capacity

Cellulose Nanofiber-Based Aerogels from Wheat Straw: Influence of Surface Load and Lignin Content on Their Properties and Dye Removal Capacity

Ozonized Water in Microbial Control: Analysis of the Stability, In Vitro Biocidal Potential, and Cytotoxicity

Photo-mediated and advanced oxidative processes applied for the treatment of effluents with drugs used for the treatment of early COVID-19: Review

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