The impact of chloride or bromide ions on the advanced oxidation of atrazine by combined electrolysis and ozonation

Saylor, Greg L.; Kupferle, Margaret J.

doi:10.1016/j.jece.2019.103105

Cited by 12 publications

(2 citation statements)

References 54 publications

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“…For the last few decades, catalytic ozonation has been attracting particular attention as one of the most promising methods for elimination of organic pollutants from contaminated water 1 . Numerous studies have revealed, however, that the efficiency of ozonation processes is strongly lowered by the presence of chlorides or bromides 2 . According to the previous reports 3 , the inhibiting effect of chlorides can be eliminated by addition of phosphate ions to the solution.…”

Section: Introductionmentioning

confidence: 99%

Bifunctional CePO4/CeO2 nanocomposite as a promising heterogeneous catalyst for the enhancement of the ozonation recovery effect in the presence of chloride ions

Fijołek

Wolski

2022

Sci Rep

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The degradation of organics through ozonation is strongly reduced by chloride ions. Although the efficiency of such processes can be recovered in the presence of homogeneous phosphates, the addition of these chemicals to water is problematic because of the generation of secondary wastes. Phosphates are known as one of the most important biogens responsible for the eutrophication of rivers and lakes. Thus, their worldwide application should be limited. The main goal of this work was to characterize the performance of solid-state cerium(III) phosphate (CePO4), cerium dioxide (CeO2), and bifunctional CePO4/CeO2 nanocomposite as substitutes for homogeneous phosphates during the ozonation of benzoic acid (BA) in the presence of chlorides. All solid-state samples used in this study were synthesized by facile hydrothermal method and thoroughly characterized. It was documented that heterogeneous CePO4 showed significantly better ozonation recovery effect than homogeneous phosphates. It was also established that the process efficiency could be further enhanced by using the bifunctional nanocomposite. Tests with the use of tert-butanol as a hydroxyl radical scavenger revealed that the improved ozonation efficiency in the presence of CePO4/CeO2 resulted from the action of HO• radicals which were the key reactive oxygen species responsible for the recovery of BA degradation in the presence of chlorides.

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Section: Introductionmentioning

confidence: 99%

Bifunctional CePO4/CeO2 nanocomposite as a promising heterogeneous catalyst for the enhancement of the ozonation recovery effect in the presence of chloride ions

Fijołek

Wolski

2022

Sci Rep

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“…The production of atrazine requires significant amounts of water and trichlorethylene as solvents, leaving a large quantity of wastewater containing organic pollutants such as atrazine, cyanuric chloride, ethylamine and isopropamide (Köck-Schulmeyer et al 2013). This effluent also contains high concentrations of chemical oxygen demand (COD) and ammonia nitrogen (NH 3 -N), up to hundreds of thousands mg L À1 and over 50 mg L À1 , respectively ( Janssens et al 1997;Saylor & Kupferle 2019). In addition, high levels of inorganic salt (NaCl), sodium hydroxide (NaOH) and other inorganic substances are commonly observed, which can hinder biochemical treatment processes (Aslan & Sȩkerdağ2016;Chen et al 2019a).…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

An ultrasound/O3 and UV/O3 process for atrazine manufacturing wastewater treatment: a multiple scale experimental study

Wen

Chen

Liu

2021

Water Science and Technology

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An ultraviolet (UV) and ultrasound (US) enhanced ozonation method were developed to investigate their efficiency on the removal of atrazine and chemical oxygen demand (COD) in the authentic atrazine manufacturing wastewater. The bench-scale tests suggested a positive effect of UV and US on the degradation of atrazine within a limited energy range. The pilot-scale flow-through system was further tested by using response surface methodology. The results showed that O3 and its interaction with UV promoted the degradation of both COD and atrazine while its interaction with US inhibited the removal of COD but promoted the removal of atrazine. The optimal removal rate of atrazine (96.9%) was achieved in the condition of 6.86 W/L UV, 1.96 g/L·h O3 and 294 W/L US. Chloride ions hindered the atrazine degradation, but the generated free chlorine radicals were still able to react with atrazine. In terms of energy-effectiveness, the configuration of 14.7 W/L UV and 1.96 g/L·h O3 is the best option, which have the electrical energy per order of 181.6 kWh/m3 for atrazine and 0.13 kWh/g COD. These method and findings could be helpful in the development of energy-efficient advanced oxidation processes in treating wastewater with high salinity and COD loadings.

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Disinfection byproducts formed from oxidation of pesticide micropollutants in water: Precursor sources, reaction kinetics, formation, influencing factors, and toxicity

Song,

Yang,

Wang

et al. 2023

Chemical Engineering Journal

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The impact of chloride or bromide ions on the advanced oxidation of atrazine by combined electrolysis and ozonation

Cited by 12 publications

References 54 publications

Bifunctional CePO4/CeO2 nanocomposite as a promising heterogeneous catalyst for the enhancement of the ozonation recovery effect in the presence of chloride ions

Bifunctional CePO4/CeO2 nanocomposite as a promising heterogeneous catalyst for the enhancement of the ozonation recovery effect in the presence of chloride ions

An ultrasound/O3 and UV/O3 process for atrazine manufacturing wastewater treatment: a multiple scale experimental study

Disinfection byproducts formed from oxidation of pesticide micropollutants in water: Precursor sources, reaction kinetics, formation, influencing factors, and toxicity

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