Atrazine degradation by in situ electrochemically generated ozone

Vera, Ysrael Marrero; Carvalho, Roberto José de; Torem, Maurício Leonardo; Calfa, Bruno A.

doi:10.1016/j.cej.2009.09.001

Cited by 17 publications

(5 citation statements)

References 18 publications

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“…In 2016, Zhou et al proposed a novel oxidation process using iron electrodes and ozone in atrazine degradation [ 111 ]. Moreover, atrazine degradation by in situ electrochemically generated ozone was reported by Vera et al in 2009 [ 112 ]. The combination of electrochemistry and ozonation exhibited higher removal efficiency for ATZ than ozonation and electrocoagulation [ 111 ].…”

Section: Chemical Methodsmentioning

confidence: 99%

Degradation of Residual Herbicide Atrazine in Agri-Food and Washing Water

Hong

Boussetta

Enderlin

et al. 2022

Foods

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Atrazine, an herbicide used to control grassy and broadleaf weed, has become an essential part of agricultural crop protection tools. It is widely sprayed on corn, sorghum and sugar cane, with the attendant problems of its residues in agri-food and washing water. If ingested into humans, this residual atrazine can cause reproductive harm, developmental toxicity and carcinogenicity. It is therefore important to find clean and economical degradation processes for atrazine. In recent years, many physical, chemical and biological methods have been proposed to remove atrazine from the aquatic environment. This review introduces the research works of atrazine degradation in aqueous solutions by method classification. These methods are then compared by their advantages, disadvantages, and different degradation pathways of atrazine. Moreover, the existing toxicological experimental data for atrazine and its metabolites are summarized. Finally, the review concludes with directions for future research and major challenges to be addressed.

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Section: Chemical Methodsmentioning

confidence: 99%

Degradation of Residual Herbicide Atrazine in Agri-Food and Washing Water

Hong

Boussetta

Enderlin

et al. 2022

Foods

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“…The triazine ring itself can be viewed as inactive towards ozone attack, although suggestions can be found in literature that ringopening is possible. [45][46][47][48][49][50] • CA has a chlorinated norbornene structure. The strong −I effect of the chlorine atoms reduces the reactivity of the substance towards ozone and other oxidants significantly.…”

Section: Percentage Of Analytes' Degradationmentioning

confidence: 99%

“…43,53,54 Atrazine. In the literature 47,49 information can be found about the main transformation products of AZ: DEA, DIA, DEDIA, HAZ and CyA., the chemical structures of which are shown in Fig. 7.…”

Section: Development Of Transformation Productsmentioning

confidence: 99%

Transformation of atrazine, bisphenol A and chlorendic acid by electrochemically produced oxidants using a lead dioxide electrode

Hermes

Knupp

2015

Environ. Sci.: Water Res. Technol.

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Artificial waters containing the xenobiotics atrazine, bisphenol A and chlorendic acid were treated by use of micro-disinfection apparatus, based on electrochemical ozone production. The design and working principle, as well as the applicability of the apparatus for the degradation of the target compounds is presented.The initial concentrations of the analytes were chosen to be in the mg L −1 order. Degradation and transformation of the analytes was determined via LC-MS, UV/Vis, and IC. Bisphenol A was degraded completely within short ozonation times, but complete mineralization could not be achieved. Ion chromatography indicated formic and oxalic acid to be transformation products. For atrazine a degradation of 96% could be achieved within 3 h. Intermediate transformation products, like desethylatrazine, desisopropylatrazine, and desethyl-desisopropylatrazine, are formed and further degraded to formic acid and chloride. Chlorendic acid was degraded by up to 40% of the initial concentration. Analyses by UV/Vis and IC again showed formic acid, chloride, and also chlorate to be transformation products.Environ. Sci.: Water Res. Technol. This journal isWater pollution by xenobiotics is a problem of significant environmental impact. Promising advanced oxidation techniques for water and waste water treatment, that can operate efficiently and sustainably, are still needed. In this paper we present a new small-scale device for electrochemically ozone production, which is able to degradate organic pollutants effectively in aqueous media. The effect of different ozone contact times were studied and degradation products are characterised. Purified water in small amounts (mL to L range) might be of great importance for medical and pharmaceutical use in areas, where no regular water or waste water treatment is possible, e.g. deserts, developing countries.

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“…Several recent studies have detailed the degradation of atrazine using electrochemical advanced oxidation processes. The majority of these studies employ boron-doped diamond electrodes such as Borràs et al (2010) or other electrode materials to generate highly oxidizing species (e.g., O 3 , Vera et al 2009). Balci et al (2009) have studied the mechanistic aspects of atrazine degradation at boron-doped diamond electrodes and achieved organic carbon removal rates of 82%.…”

Section: Introductionmentioning

confidence: 99%

Unexpected toxicity decrease during photoelectrochemical degradation of atrazine with NaCl

et al. 2011

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This report shows an unexpected toxicity decrease during atrazine photoelectrodegradation in the presence of NaCl. Atrazine is a pesticide classified as endocrine disruptor occurring in industrial effluents and agricultural wastewaters. We therefore studied the effects of the degradation method, electrochemical and electrochemical photo-assisted, and of the supporting electrolyte, NaCl and Na 2 SO 4 , on the residual toxicity of treated atrazine solutions. We also studied the toxicity of treated atrazine solutions using Artemia nauplii. Results show that at initial concentration of 20 mg L -1 , atrazine was completely removed in up to 30 min using 10 mA cm -2 electrolysis in NaCl medium, regardless of the electrochemical method used. The total organic carbon removal by the photo-assisted method was 82% with NaCl and 95% with Na 2 SO 4 . The solution toxicity increased during sole electrochemical treatment in NaCl, as expected. However, the toxicity unexpectedly decreased using the photo-assisted method. This finding is a major discovery because electrochemical treatment with NaCl usually leads to the formation of toxic chlorine-containing organic degradation by-products.

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Atrazine degradation by in situ electrochemically generated ozone

Cited by 17 publications

References 18 publications

Degradation of Residual Herbicide Atrazine in Agri-Food and Washing Water

Degradation of Residual Herbicide Atrazine in Agri-Food and Washing Water

Transformation of atrazine, bisphenol A and chlorendic acid by electrochemically produced oxidants using a lead dioxide electrode

Unexpected toxicity decrease during photoelectrochemical degradation of atrazine with NaCl

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