O3, O3/UV and O3/UV/ZnO for abatement of parabens in aqueous solutions: Effect of operational parameters and mineralization/biodegradability improvement

Asgari, Esrafil; Esrafili, Ali; Rostami, Roohollah; Farzadkia, Mahdi

doi:10.1016/j.psep.2019.03.032

Cited by 50 publications

(30 citation statements)

References 60 publications

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“…They are based on the oxidation of organic pollutants by strong oxidants, mainly hydroxyl radicals generated by ozone, hydrogen peroxide, and others [19]. The best oxidation results are achieved in synergistic processes using systems consisting of two or three components, e.g., H 2 O 2 /UV or O 3 /H 2 O 2 /UV [19,20]. The use of such systems improves the cleaning effects by increasing the efficiency of mineralization of EOCs and reducing the amount of products of incomplete oxidation [21].…”

Section: Conventional Wastewater Treatment Methods Are Usually Not Sumentioning

confidence: 99%

Removal of Organic Pollution in the Water Environment

Karpińska

Kotowska

2019

Water

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The development of civilization entails a growing demand for consumer goods. A side effect of the production and use of these materials is the production of solid waste and wastewater. Municipal and industrial wastewater usually contain a large amount of various organic compounds and are the main source of pollution of the aquatic environment with these substances. Therefore, the search for effective methods of wastewater and other polluted water treatment is an important element of caring for the natural environment. This Special Issue contains nine peer-review articles presenting research on the determination and removal of environmentally hazardous organic compounds from aqueous samples. The presented articles were categorized into three major fields: new approaches to the degradation of water pollutants, new methods of isolation and determination of the emerging organic contaminants (EOCs), and the occurrence of EOCs in the water environment. These articles present only selected issues from a very wide area, which is the removal of organic pollution in water environment, but can serve as important references for future studies.

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Section: Conventional Wastewater Treatment Methods Are Usually Not Sumentioning

confidence: 99%

Removal of Organic Pollution in the Water Environment

Karpińska

Kotowska

2019

Water

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“…Indeed, a significant DOC decrease was only detecte d after 3h and the mineralization levels remained low even at the end of the runs; only 9% of the organic carbon was removed for a 100 mg L -1 initial CTC solution, while 27% of DOC removal was reached for a CTC A c c e p t e d m a n u s c r i p t concentration of 50 mg L -1 . To achieve a high mineralization rate, which reduces the environmental risks of effluent discharges [35], subsequent biological treatment seemed therefore relevant, owing to the significant residual organic carbon content. Indeed, organic CTC transformation products can be used as a carbon source by biomass [36].…”

Section: Effect Of the Oxidation Potentialmentioning

confidence: 99%

Nickel foam as a new material for chlortetracycline electrochemical oxidation: Biodegradability improvement and biological treatment

Saidi

Fourcade

Bellakhal

et al. 2020

Journal of Electroanalytical Chemistry

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Chlortetracycline CTC is an organochlorine compound released from industrial pharmaceutical waste. This pollutant had dangerous effects in aquatic organisms and human health, since it is responsible for inhibition of microbial activity and growth. In this study, the elimination of CTC from water is A c c e p t e d m a n u s c r i p t targeted. Biodegradability, based on the BOD 5 / COD ratio was studied, showing the non-feasibility of a direct biological treatment. Cyclic voltammetry analysis on a nickel electrode revealed a significant electrochemical activity of CTC. An electrochemical pre-treatment was therefore carried out in a percolation cell using a nickel foam as a working electrode at the potential of 0.5 V /SCE. The operating parameters were optimized. A degradation yield of 99% was achieved for an initial concentration of pollutant of 50 mg L-1 and a flow rate of 5 mL min-1 in alkaline conditions. After electrolysis, a total dechlorination of CTC was observed. The biodegradability ratio was improved, from 0.13 to 0.33 after electrolysis; while the dissolved organic carbon (DOC) analysis revealed that the level of mineralization remained low 27%. A 21 days biological treatment with activated sludge was then carried out, leading to an overall mineralization yield of 78%.

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“…The efficiency of ozone-based technology is highly dependent on pH, which has the ability to change the ozone oxidation pathway and dissolve ozone concentration (Hoigné and Bader 1976;Olak-Kucharczyk and Ledakowicz 2016;Pipolo et al 2017;Asgari et al 2019). In an acidic condition, molecular ozone pathway occurs; in neutral and alkaline environments, the hydroxyl radical pathway is promoted.…”

Section: Comparison Of Ozone and H 2 O 2 Technologiesmentioning

confidence: 99%

“…H 2 O 2 /Fe 2+ has an optimum effectivity at pH ≈ 3, particularly due to the precipitation of ferric oxyhydroxide at higher pH value (Ikhlaq et al 2018(Ikhlaq et al , 2019. However, alkaline environment is the favourable pH for most AOPs (Glaze et al 1987;Lucas et al 2010;Xiao et al 2015;Boczkaj and Fernandes 2017;Shahzad Munir et al 2019;Asgari et al 2019;Ikhlaq et al 2019). In fact, the AOPs are aimed to be applied as tertiary systems for the removal of hazardous water contaminants from municipal wastewater treatment plants (Gmurek et al 2017;Wang et al 2018;Miklos et al 2018;Soriano-Molina et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Comparison of radical-driven technologies applied for paraben mixture degradation: mechanism, biodegradability, toxicity and cost assessment

Gmurek

Gomes

Martins

et al. 2019

Environ Sci Pollut Res

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Parabens (esters of p-hydroxybenzoic acid) are xenobiosis belonging to endocrine disruptors and commonly used as a preservative in cosmetics, food, pharmaceutical, and personal care products. Their wide use is leading to their appearance in water and wastewater in the range from ng/L to mg/L. In fact, the toxicity of benzylparaben is comparable to bisphenol A. Therefore, it is important to find not only effective but also ecofriendly methods for their removal from aqueous environment since the traditional wastewater treatment approaches are ineffective. Herein, for the first time, such extended comparison of several radical-driven technologies for paraben mixture degradation is presented. The detailed evaluation included (1) comparison of ozone and hydroxyl peroxide processes; (2) comparison of catalytic and photocatalytic processes (including photocatalytic ozonation); (3) characterisation of catalysts using SEM, XRD, DRS, XPS techniques and BET isotherm; (4) mineralisation, biodegradability and toxicity assessment; and (5) cost assessment.

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O3, O3/UV and O3/UV/ZnO for abatement of parabens in aqueous solutions: Effect of operational parameters and mineralization/biodegradability improvement

Cited by 50 publications

References 60 publications

Removal of Organic Pollution in the Water Environment

Removal of Organic Pollution in the Water Environment

Nickel foam as a new material for chlortetracycline electrochemical oxidation: Biodegradability improvement and biological treatment

Comparison of radical-driven technologies applied for paraben mixture degradation: mechanism, biodegradability, toxicity and cost assessment

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