کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6306585 | 1618810 | 2016 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Toxicity removal assessments related to degradation pathways of azo dyes: Toward an optimization of Electro-Fenton treatment
ترجمه فارسی عنوان
ارزیابی حذف سمی مربوط به مسیرهای تخریب رنگ های آزو: به منظور بهینه سازی درمان الکترو فنتون
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کلمات کلیدی
کربن احساس، فرایند اکسیداسیون پیشرفته، معدنی شدن، سمی بودن اسید نارنجی 7،
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
چکیده انگلیسی
The degradation pathway of Acid Orange 7 (AO7) by Electro-Fenton process using carbon felt cathode was investigated via HPLC-UV and LC-MS, IC, TOC analysis and bioassays (Vibrio Fischeri 81.9% Microtox® screening tests). The TOC removal of AO7 reached 96.2% after 8Â h treatment with the optimal applied current density at â8.3Â mAÂ cmâ2 and 0.2Â mM catalyst concentration. The toxicity of treated solution increased rapidly to its highest value at the early stage of electrolysis (several minutes), corresponding to the formation of intermediate poisonous aromatic compounds such as 1,2-naphthaquinone (NAPQ) and 1,4-benzoquinone (BZQ). Then, the subsequent formation of aliphatic short-chain carboxylic acids like acetic acid, formic acid, before the complete mineralization, leaded to a non-toxic solution after 270Â min for 500Â mL of AO7 (1Â mM). Moreover, a quantitative analysis of inorganic ions (i.e. ammonium, nitrate, sulfate) produced during the course of degradation could help to verify molar balance with regard to original nitrogen and sulfur elements. To conclude, a clear degradation pathway of AO7 was proposed, and could further be applied to other persistent pharmaceuticals in aquatic environment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 161, October 2016, Pages 308-318
Journal: Chemosphere - Volume 161, October 2016, Pages 308-318
نویسندگان
Thi Xuan Huong Le, Thi Van Nguyen, Zoulkifli Amadou Yacouba, Laetitia Zoungrana, Florent Avril, Eddy Petit, Julie Mendret, Valerie Bonniol, Mikhael Bechelany, Stella Lacour, Geoffroy Lesage, Marc Cretin,