کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4763496 | 1422971 | 2017 | 29 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Decomposition of dexamethasone by gamma irradiation: Kinetics, degradation mechanisms and impact on algae growth
ترجمه فارسی عنوان
تجزیه دگزامتازون با اشعه گاما: سینتیک، مکانیسم تخریب و تاثیر بر رشد جلبک
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کلمات کلیدی
اشعه گاما، دگزامتازون، مکانیزم حذف، سینتیک، رشد جلبک،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
Gamma-irradiation induced degradation of dexamethasone (DEX) in aqueous solution was investigated under different conditions. The results indicate that low-concentration DEX could be effectively decomposed during gamma irradiation. H2O2 and Fenton reagent were favorable for DEX radiolytic removal. However, DEX radiolysis was restrained in the presence of NO3-, CO32-, 2-propanol and tert-butanol. DEX radiolytic degradation was in accordance with the pseudo first-order reaction kinetics. The rate constant ratios of OH, eaq- and H towards DEX degradation could be calculated as kOH: keaq-: kHÂ =Â 10:1.5:1. Besides, it is observed that radiolytic degradation of DEX restrained algae growth. Finally, LC-MS analysis was employed to identify the intermediates and Gaussian 03 software was used to optimize DEX geometry structure. On the basis of LC-MS analysis and Gaussian calculations, we attributed DEX radiolytic removal to OH oxidation, OH radical substitution and direct cleavage of DEX molecules.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 307, 1 January 2017, Pages 722-728
Journal: Chemical Engineering Journal - Volume 307, 1 January 2017, Pages 722-728
نویسندگان
Zhaobing Guo, Anke Guo, Qingjun Guo, Maoling Rui, Yongfu Zhao, Haixiao Zhang, Shengnan Zhu,