کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
221533 464260 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemical treatment of poorly biodegradable DPC cationic surfactant
ترجمه فارسی عنوان
درمان الکتروشیمیایی ضعیف زیست تخریب پذیر DPC سورفاکتانت کاتیونی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی

The electrochemical oxidation of the cationic surfactant dodecylpyridinium chloride (DPC) was investigated using an electrolytic flow cell operating in batch recycle mode under galvanostatic conditions. The cell was equipped with a boron-doped diamond anode and a stainless steel cathode. The effects of some operating parameters, such as current density, recirculation flow-rate, and DPC concentration were investigated. DPC removal and mineralization were monitored by HPLC analyses and TOC measurements. The results show that DPC can be successfully removed and that degradation is under mass-transport control. The oxidation rate was well described by pseudo-first-order kinetics, and while the apparent rate constant increased with flow-rate, it was unaffected by DPC concentration and current density. Under optimum 5 mA cm−2 and 300 dm3 h−1 conditions, the apparent rate constant was 3.13 × 10−4 s−1. DPC solution with 75 mg dm−3 of surfactant (54 mgdm−3 of initial TOC) was completely mineralized in 330 min, achieving maximum 33% efficiency. Anodic oxidation of the cationic DPC was compared with anionic sodium dodecyl benzene sulfonate (SDBS) degradation and DPC oxidation was demonstrated to be faster and requiring less energy due to the presence of chloride ions in the DPC molecules that are oxidized to active chlorine which acts as redox mediator increasing the removal rate.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Chemical Engineering - Volume 4, Issue 3, September 2016, Pages 2692–2697
نویسندگان
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