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• W2334111943 endingPage "6891" @default.
• W2334111943 startingPage "6884" @default.
• W2334111943 abstract "Atrazine (Atz) and its metabolite desethylatrazine (DEA) frequently occur in the environment. Conclusive interpretation of their transformation is often difficult. This study explored evidence from (13)C/(12)C and (15)N/(14)N isotope trends in parent and daughter compounds when Atz was dealkylated by (i) permanganate and (ii) the bacterium Rhodococcus sp. NI86/21. In both transformations, (13)C/(12)C ratios of atrazine increased strongly (ε(carbon/permanganate) = -4.6 ± 0.6‰ and ε(carbon/Rhodoccoccus) = -3.8 ± 0.2‰), whereas nitrogen isotope fractionation was small. (13)C/(12)C ratios of DEA showed the following trends. (i) When DEA was formed as the only product (Atz + permanganate), (13)C/(12)C remained constant, close to the initial value of Atz, because the carbon atoms involved in the reaction step are not present in DEA. (ii) When DEA was formed together with desisopropylatrazine (biodegradation of Atz), (13)C/(12)C increased but only within 2‰. (iii) When DEA was further biodegraded, (13)C/(12)C increased by up to 9‰ giving strong testimony of the metabolite's breakdown. Two lines of evidence emerge. (a) Enrichment of (13)C/(12)C in DEA, compared to initial Atz, may contain evidence of further DEA degradation. (b) Dual element ((15)N/(14)N versus (13)C/(12)C) isotope plots for dealkylation of atrazine agree with indirect photodegradation but differ from direct photolysis and biotic hydrolysis. Trends in multielement isotope data of atrazine may, therefore, decipher different degradation pathways." @default.
• W2334111943 created "2016-06-24" @default.
• W2334111943 creator A5017048288 @default.
• W2334111943 creator A5041977690 @default.
• W2334111943 date "2013-06-03" @default.
• W2334111943 modified "2023-10-13" @default.
• W2334111943 title "¹³C/¹²C and ¹⁵N/¹⁴N Isotope Analysis To Characterize Degradation of Atrazine: Evidence from Parent and Daughter Compound Values" @default.
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• W2334111943 doi "https://doi.org/10.1021/es305242q" @default.
• W2334111943 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23627882" @default.
• W2334111943 hasPublicationYear "2013" @default.
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