TY  - JOUR
AU  - Pergal, Marija V.
AU  - Kodranov, Igor D.
AU  - Dojčinović, Biljana P.
AU  - Avdin, Viacheslav V.
AU  - Stanković, Dalibor M.
AU  - Petković, Branka B.
AU  - Manojlović, Dragan D.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8994
AB  - Chlorine dioxide (ClO2) 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 ClO2 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 ClO2 degradation for the examined organophosphorus pesticides. In Sava River water, however, extended treatment duration achieved lower degradation efficiency, so ClO2 oxidized both the pesticides and dissolved organic matter in parallel. After degradation, AZA produced four identified products (6-chlorooxazolo[4,5-b]pyridin-2(3H)-one; O,O,S-trimethyl phosphorothioate; 6-chloro-3-(hydroxymethyl)oxazolo[4,5-b]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.
T2  - Environmental Science and Pollution Research
T1  - Evaluation of azamethiphos and dimethoate degradation using chlorine dioxide during water treatment
VL  - 27
IS  - 21
SP  - 27147
EP  - 27160
DO  - 10.1007/s11356-020-09069-5
ER  - 

@article{
author = "Pergal, Marija V. and Kodranov, Igor D. and Dojčinović, Biljana P. and Avdin, Viacheslav V. and Stanković, Dalibor M. and Petković, Branka B. and Manojlović, Dragan D.",
year = "2020",
abstract = "Chlorine dioxide (ClO2) 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 ClO2 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 ClO2 degradation for the examined organophosphorus pesticides. In Sava River water, however, extended treatment duration achieved lower degradation efficiency, so ClO2 oxidized both the pesticides and dissolved organic matter in parallel. After degradation, AZA produced four identified products (6-chlorooxazolo[4,5-b]pyridin-2(3H)-one; O,O,S-trimethyl phosphorothioate; 6-chloro-3-(hydroxymethyl)oxazolo[4,5-b]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.",
journal = "Environmental Science and Pollution Research",
title = "Evaluation of azamethiphos and dimethoate degradation using chlorine dioxide during water treatment",
volume = "27",
number = "21",
pages = "27147-27160",
doi = "10.1007/s11356-020-09069-5"
}

Pergal, M. V., Kodranov, I. D., Dojčinović, B. P., Avdin, V. V., Stanković, D. M., Petković, B. B.,& Manojlović, D. D.. (2020). Evaluation of azamethiphos and dimethoate degradation using chlorine dioxide during water treatment. in Environmental Science and Pollution Research, 27(21), 27147-27160.
https://doi.org/10.1007/s11356-020-09069-5

Pergal MV, Kodranov ID, Dojčinović BP, Avdin VV, Stanković DM, Petković BB, Manojlović DD. Evaluation of azamethiphos and dimethoate degradation using chlorine dioxide during water treatment. in Environmental Science and Pollution Research. 2020;27(21):27147-27160.
doi:10.1007/s11356-020-09069-5 .

Pergal, Marija V., Kodranov, Igor D., Dojčinović, Biljana P., Avdin, Viacheslav V., Stanković, Dalibor M., Petković, Branka B., Manojlović, Dragan D., "Evaluation of azamethiphos and dimethoate degradation using chlorine dioxide during water treatment" in Environmental Science and Pollution Research, 27, no. 21 (2020):27147-27160,
https://doi.org/10.1007/s11356-020-09069-5 . .