Assessment of Degradation of Sulfonylurea Herbicides in Water by Chlorine Dioxide

Pergal, Marija V.; Kodranov, Igor; Pergal, Miodrag M.; Dojčinović, Biljana; Stanković, Dalibor M.; Petković, Branka B.; Manojlović, Dragan

doi:10.1007/s11270-018-3947-2

Cited by 9 publications

(12 citation statements)

References 40 publications

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“…Pesticide degradation efficiency was measured as previously described (Pergal et al 2018). Compounds were separated chromatographically using the equipment, mobile phase, and elution program as previously described (Pergal et al 2018), with the exception that 25-μL volumes were injected. Analysis and data processing was done using Chromeleon v 6.8 (ThermoFisher Scientific).…”

Section: Characterization Techniquesmentioning

confidence: 99%

“…At given time intervals, samples were withdrawn from the reaction flasks and quenched using Na 2 S 2 O 3 . Degradation efficiency was calculated as previously described (Pergal et al 2018;Roglić GPergal et al 2017). Pesticide degradation studies were conducted in triplicate in order to confirm results were reproducible; experimental error was always within 5%.…”

Section: Characterization Techniquesmentioning

confidence: 99%

“…Identification of major degradation products was done using gas chromatograph with triple quadrupole mass detector (GC-QQQ, Agilent Technologies) as previously described (Pergal et al 2018). Temperature was programed as follows: 40°C, 1 min; 25°C/min to 160°C, 1 min; 5°C/min to 300°C, 0.5 min.…”

Section: Characterization Techniquesmentioning

confidence: 99%

“…Toxicity tests (Pergal et al 2018). Reconstituted hard water for the negative control and for use as the dilution medium was prepared according to Klüttgen et al (1994).…”

Section: Toc Degradationmentioning

confidence: 99%

“…Relatively high efficiency of several pesticides (isoproturon, chlortoluron, diuron, ametryn, methiocarb, phorate, diazinon, nicosulfuron, etc. ), other contaminants, pharmaceuticals (diclofenac, sulfonamide antibiotics, and antipyrine) oxidation was acknowledged for ClO 2 in several studies (Wang et al 2014;Lopez et al 1997;Jia et al 2017;Wang et al 2015;Ben et al 2017;Chamberlain et al 2012;Hwang et al 2002;Pergal et al 2018). On the other hand, rare degradation of some other pharmaceuticals (clofibric acid, caffeine, cyclophosphamide, and fenoprofen) was reported by Huber et al (2005).…”

Section: Introductionmentioning

confidence: 97%

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Evaluation of azamethiphos and dimethoate degradation using chlorine dioxide during water treatment

Pergal

Kodranov

Dojčinović

et al. 2020

Environ Sci Pollut Res

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Chlorine dioxide (ClO 2) degradation of the organophosphorus pesticides azamethiphos (AZA) and dimethoate (DM) (10 mg/L) in deionized water and in Sava River water was investigated for the first time. Pesticide degradation was studied in terms of ClO 2 level (5 and 10 mg/L), degradation duration (0.5, 1, 2, 3, 6, and 24 h), pH (3.00, 7.00, and 9.00), and under light/dark conditions in deionized water. Degradation was monitored using high-performance liquid chromatography. Gas chromatography coupled with triple quadrupole mass detector was used to identify degradation products of pesticides. Total organic carbon was measured to determine the extent of mineralization after pesticide degradation. Real river water was used under recommended conditions to study the influence of organic matter on pesticide degradation. High degradation efficiency (88-100% for AZA and 85-98% for DM) was achieved in deionized water under various conditions, proving the flexibility of ClO 2 degradation for the examined organophosphorus pesticides. In Sava River water, however, extended treatment duration achieved lower degradation efficiency, so ClO 2 oxidized both the pesticides and dissolved organic matter in parallel. After degradation, AZA produced four identified products (6chlorooxazolo[4,5-b]pyridin-2(3H)-one; O,O,S-trimethyl phosphorothioate; 6-chloro-3-(hydroxymethyl)oxazolo[4,5b]pyridin-2(3H)-one; O,O-dimethyl S-hydrogen phosphorothioate) and DM produced three (O,O-dimethyl S-(2-(methylamino)-2-oxoethyl) phosphorothioate; e.g., omethoate; S-(2-(methylamino)-2-oxoethyl) O,O-dihydrogen phosphorothioate; O,O,S-trimethyl phosphorodithioate). Simple pesticide degradation mechanisms were deduced. Daphnia magna toxicity tests showed degradation products were less toxic than parent compounds. These results contribute to our understanding of the multiple influences that organophosphorus pesticides and their degradation products have on environmental ecosystems and to improving pesticide removal processes from water.

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Section: Characterization Techniquesmentioning

confidence: 99%

Section: Characterization Techniquesmentioning

confidence: 99%

Section: Characterization Techniquesmentioning

confidence: 99%

“…Toxicity tests (Pergal et al 2018). Reconstituted hard water for the negative control and for use as the dilution medium was prepared according to Klüttgen et al (1994).…”

Section: Toc Degradationmentioning

confidence: 99%