کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9451336 | 1307812 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Mineralization of paracetamol in aqueous medium by anodic oxidation with a boron-doped diamond electrode
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Mineralization of paracetamol in aqueous medium by anodic oxidation with a boron-doped diamond electrode Mineralization of paracetamol in aqueous medium by anodic oxidation with a boron-doped diamond electrode](/preview/png/9451336.png)
چکیده انگلیسی
The degradation of 100 ml of solutions with paracetamol (N-(4-hydroxyphenyl)acetamide) up to 1 g lâ1 in the pH range 2.0-12.0 has been studied by anodic oxidation in a cell with a boron-doped diamond (BDD) anode and a graphite cathode, both of 3-cm2 area, by applying a current of 100, 300 and 450 mA between 25 and 45 °C. Complete mineralization is always achieved due to the great concentration of hydroxyl radical (OH) generated at the BDD surface, with release of NH4+ and NO3- ions. The mineralization rate is pH-independent, increases with increasing applied current and temperature, but decreases when drug concentration raises from 315 mg lâ1. Reversed-phase chromatography revealed a similar complex paracetamol decay in acid and alkaline media. Ion-exclusion chromatography allowed the detection of oxalic and oxamic acids as ultimate carboxylic acids. When the same solutions have been comparatively treated with a Pt anode, a quite poor mineralization is found because of the production of much lower OH concentration. Under these conditions, the degradation rate is enhanced in alkaline medium and polymerization of intermediates is favored in concentrated solutions. Paracetamol can be completely destroyed with Pt and its kinetics follows a pseudo-first-order reaction with a constant rate independent of pH.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 58, Issue 4, January 2005, Pages 399-406
Journal: Chemosphere - Volume 58, Issue 4, January 2005, Pages 399-406
نویسندگان
Enric Brillas, Ignasi Sirés, Conchita Arias, Pere LluÃs Cabot, Francesc Centellas, Rosa MarÃa RodrÃguez, José Antonio Garrido,