کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
585346 | 877911 | 2006 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrochemical treatment of textile dyes and dyehouse effluents
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The electrochemical oxidation of textile effluents over a titanium-tantalum-platinum-iridium anode was investigated. Batch experiments were conducted in a flow-through electrolytic cell with internal recirculation at current intensities of 5, 10, 14 and 20Â A, NaCl concentrations of 0.5, 1, 2 and 4% and recirculation rates of 0.81 and 0.65Â L/s using a highly colored, synthetic effluent containing 16 textile dyes at a total concentration of 361Â mg/L and chemical oxygen demand (COD) of 281Â mg/L. Moreover, an actual dyehouse effluent containing residual dyes as well as various inorganic and organic compounds with a COD of 404Â mg/L was tested. In most cases, quantitative effluent decolorization was achieved after 10-15Â min of treatment and this required low energy consumption; conversely, the extent of mineralization varied between 30 and 90% after 180Â min depending on the operating conditions and the type of effluent. In general, treatment performance improved with increasing current intensity and salinity and decreasing solution pH. However, the use of electrolytes not containing chloride (e.g. FeSO4 or Na2SO4) suppressed degradation. Although the acute toxicity of the actual effluent to marine bacteria Vibrio fischeri was weak, it increased sharply following treatment, thus suggesting the formation of persistent toxic by-products.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 137, Issue 2, 21 September 2006, Pages 998-1007
Journal: Journal of Hazardous Materials - Volume 137, Issue 2, 21 September 2006, Pages 998-1007
نویسندگان
Efthalia Chatzisymeon, Nikolaos P. Xekoukoulotakis, Alberto Coz, Nicolas Kalogerakis, Dionissios Mantzavinos,