Université de Reims Champagne Ardenne, CNRS, GSMA, UMR 7331, 51097 Reims, France GSMA, UMR CNRS 7331, Moulin de la Housse, B.P. 1039, 51687 Reims, France; Food and Molecular Biochemistry Laboratory, National Institute of Applied Sciences Technology (INSAT), University of Carthage, Tunis 1080, Tunisia; Faculty of Sciences of Bizerte, University of Carthage, Tunis 1080, Tunisia.
Food and Molecular Biochemistry Laboratory, National Institute of Applied Sciences Technology (INSAT), University of Carthage, Tunis 1080, Tunisia.
Sci Total Environ. 2019 Dec 1;694:133745. doi: 10.1016/j.scitotenv.2019.133745. Epub 2019 Aug 2.
Tebuconazole (Tbz) and diniconazole (Dnz) were deposited as thin film on quartz plaques. They were submitted to OH-radicals and ozone and their kinetic was measured. OH-radical oxidation was performed relative to a reference whose rate constant is well known. Terbuthylazine (Tbt) and Chlorpyriphos Ethyl (Clp) were chosen as reference for Tbz and Dnz kinetics determination, respectively. OH-radical rate constants of Tbz and Dnz were found to be: k = (1.7 ± 0.2) 10 cm molecule s and k = (1.74 ± 1.21) 10 cm molecule s, respectively. Ozone heterogeneous oxidation rate constants were determined in an absolute way: k = (0.5 ± 0.2) 10 cm molecule s; k = (1.4 ± 0.2) 10 cm molecule s. Dnz is ten times more reactive toward OH-radicals than Tbz and 27 times more reactive than Tbz toward ozone maybe because of the presence of a double bond in Dnz. Lifetimes of Tbz and Dnz on quartz like surfaces are against OH-radicals are of 68 days and 8 days, respectively and 4 months and several years against ozone, respectively.
特丁津（Tbz）和烯唑醇（Dnz）被沉积在石英板上形成薄膜。它们与 OH 自由基和臭氧接触，并测量其动力学。OH 自由基氧化是相对于速率常数已知的参考物进行的。特丁津（Tbt）和毒死蜱乙基（Clp）分别被选为 Tbz 和 Dnz 动力学测定的参考物。Tbz 和 Dnz 的 OH 自由基反应速率常数分别为：k=（1.7±0.2）×10cm3molecule-1s-1和 k=（1.74±1.21）×10cm3molecule-1s-1。臭氧非均相氧化速率常数通过绝对方法确定：k=（0.5±0.2）×10cm3molecule-1s-1；k=（1.4±0.2）×10cm3molecule-1s-1。Dnz 对 OH 自由基的反应性比 Tbz 高十倍，比 Tbz 对臭氧的反应性高 27 倍，这可能是因为 Dnz 中存在双键。Tbz 和 Dnz 在石英样表面上对 OH 自由基的寿命分别为 68 天和 8 天，而对臭氧的寿命分别为 4 个月和数年。
