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Photochemical degradation of atrazine in UV and UV/H2O2 process: pathways and toxic effects of products.
J Environ Sci Health B. 2013; 48(11):927-34.JE

Abstract

The degradation of atrazine in aqueous solution by UV or UV/H2O2 processes, and the toxic effects of the degradation products were explored. The mineralization of atrazine was not observed in the UV irradiation process, resulting in the production of hydroxyatrazine (OIET) as the final product. In the UV/H2O2 process, the final product was ammeline (OAAT), which was obtained by two different pathways of reaction: dechlorination followed by hydroxylation, and the de-alkylation of atrazine. The by-products of the reaction of dechlorination followed by hydroxylation were OIET and hydroxydeethyl atrazine (OIAT), and those of de-alkylation were deisopropyl atrazine (CEAT), deethyl atrazine (CIAT), and deethyldeisopropyl atrazine (CAAT). OIAT and OAAT appeared to be quite stable in the degradation of atrazine by the UV/H2O2 process. In a toxicity test using Daphnia magna, the acute toxic unit (TUa) was less than 1 of TUa (100/EC50, %) in the UV/H2O2 process after 30 min of reaction time, while 1.2 to 1.3 of TUa was observed in the UV process. The TUa values of atrazine and the degradation products have the following decreasing order: OIET> Atrazine> CEAT≈CIAT> CAAT. OIAT and OAAT did not show any toxic effects.

Authors+Show Affiliations

Research Strategy & Planning Division, National Institute of Environmental Research, Incheon, Republic of Korea.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

23998304

Citation

Choi, Hyun-Jin, et al. "Photochemical Degradation of Atrazine in UV and UV/H2O2 Process: Pathways and Toxic Effects of Products." Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes, vol. 48, no. 11, 2013, pp. 927-34.
Choi HJ, Kim D, Lee TJ. Photochemical degradation of atrazine in UV and UV/H2O2 process: pathways and toxic effects of products. J Environ Sci Health B. 2013;48(11):927-34.
Choi, H. J., Kim, D., & Lee, T. J. (2013). Photochemical degradation of atrazine in UV and UV/H2O2 process: pathways and toxic effects of products. Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes, 48(11), 927-34. https://doi.org/10.1080/03601234.2013.816587
Choi HJ, Kim D, Lee TJ. Photochemical Degradation of Atrazine in UV and UV/H2O2 Process: Pathways and Toxic Effects of Products. J Environ Sci Health B. 2013;48(11):927-34. PubMed PMID: 23998304.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Photochemical degradation of atrazine in UV and UV/H2O2 process: pathways and toxic effects of products. AU - Choi,Hyun-Jin, AU - Kim,Daekeun, AU - Lee,Tae-Jin, PY - 2013/9/4/entrez PY - 2013/9/4/pubmed PY - 2014/4/1/medline SP - 927 EP - 34 JF - Journal of environmental science and health. Part. B, Pesticides, food contaminants, and agricultural wastes JO - J Environ Sci Health B VL - 48 IS - 11 N2 - The degradation of atrazine in aqueous solution by UV or UV/H2O2 processes, and the toxic effects of the degradation products were explored. The mineralization of atrazine was not observed in the UV irradiation process, resulting in the production of hydroxyatrazine (OIET) as the final product. In the UV/H2O2 process, the final product was ammeline (OAAT), which was obtained by two different pathways of reaction: dechlorination followed by hydroxylation, and the de-alkylation of atrazine. The by-products of the reaction of dechlorination followed by hydroxylation were OIET and hydroxydeethyl atrazine (OIAT), and those of de-alkylation were deisopropyl atrazine (CEAT), deethyl atrazine (CIAT), and deethyldeisopropyl atrazine (CAAT). OIAT and OAAT appeared to be quite stable in the degradation of atrazine by the UV/H2O2 process. In a toxicity test using Daphnia magna, the acute toxic unit (TUa) was less than 1 of TUa (100/EC50, %) in the UV/H2O2 process after 30 min of reaction time, while 1.2 to 1.3 of TUa was observed in the UV process. The TUa values of atrazine and the degradation products have the following decreasing order: OIET> Atrazine> CEAT≈CIAT> CAAT. OIAT and OAAT did not show any toxic effects. SN - 1532-4109 UR - https://www.unboundmedicine.com/medline/citation/23998304/Photochemical_degradation_of_atrazine_in_UV_and_UV/H2O2_process:_pathways_and_toxic_effects_of_products_ L2 - https://www.tandfonline.com/doi/full/10.1080/03601234.2013.816587 DB - PRIME DP - Unbound Medicine ER -