کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8851614 | 1618769 | 2018 | 33 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Investigation of applicability of Electro-Fenton method for the mineralization of naphthol blue black in water
ترجمه فارسی عنوان
بررسی کاربرد الکترو فنتون برای کانی سازی نفتل سیاه آبی در آب
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کلمات کلیدی
الکترو فنتون، نفتول آبی سیاه، معدنی شدن، تصفیه آب، رنگ های مصنوعی،
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
چکیده انگلیسی
In this study, mineralization and color removal performance of electro-Fenton method were examined in water containing naphthol blue black (NBB), a diazo dye. NBB was totally converted to intermediate species in a 15-min electrolysis at 60â¯mA, but complete de-colorization took 180â¯min. A very high oxidation rate constant ((3.35â¯Â±â¯0.21) x 1010â¯Mâ1sâ1) was obtained for NBB, showing its high reactivity towards hydroxyl radicals. A very high total organic carbon (TOC) removal value (45.23â¯mgâ¯Lâ1) was obtained in the first 60â¯min of the electro-Fenton treatment of an aqueous solution of NBB (0.25â¯mM) at 300â¯mA, indicating the mineralization efficiency of the electro-Fenton method. Mineralization current efficiency values obtained at 300â¯mA gradually decreased from 24.18% to 4.47% with the electrolysis time, indicating the presence of highly parasitic reactions. Gas chromatography-mass spectrometry analyses revealed that the cleavage of azo bonds of NBB led to formation of different aromatic and aliphatic oxidation intermediates. Ion chromatography analysis showed that ammonium, nitrate and sulfate were the mineralization end-products. The concentration of sulfate ion reached to its quantitative value at the 4th h of electrolysis. On the other hand, the total concentration of ammonium and nitrate ions reached to only 61% of the stoichiometric amount of initial nitrogen after a 7â¯h electrolysis. Finally, it can be said that the electro-Fenton method is a suitable and efficient method for the removal of NBB and its intermediates from water.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 202, July 2018, Pages 618-625
Journal: Chemosphere - Volume 202, July 2018, Pages 618-625
نویسندگان
Ayça Atılır Ãzcan, Ali Ãzcan,