کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6664004 | 1427042 | 2018 | 21 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrochemical decolorization of Rhodamine B dye: Influence of anode material, chloride concentration and current density
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
Surface water contamination by dyes released from a variety of industries is an environmental problem of great concern. However, electrochemical oxidation is a promising alternative for water treatment. In this paper, we studied the electrochemical oxidation of Rhodamine B (RhB) dye on the Ti/RuO2-IrO2 (DSA®) and SnO2 anodes comparing their efficiencies. The effect of some parameters, such as current density, initial pH (pH0), nature, concentration of electrolyte and temperature at the electrochemical oxidation was investigated evaluating the decolorization and the chemical oxygen demand (COD) removal at optimal conditions. Complete decolorization of RhB was achieved in the presence of chloride ions at different times using both electrodes. An optimum efficiency was obtained at pH 6.5, Tâ¯=â¯25â¯Â°C. Also, the current density of 40â¯mAâ¯cmâ2 using the DSA electrode in NaCl 0.05â¯molâ¯Lâ1+ Na2SO4 0.1â¯molâ¯Lâ1 mixture solution as a supporting electrolyte, 100% color removal and 61.7% chemical oxygen demand removal after 90â¯min of electrolysis were achieved. DSA showed better performance than SnO2 in wide operating conditions and was proved to be more cost-effective and more efficient. The effectiveness of the degradation is explained by indirect electrochemical oxidation, where in the presence of chlorides electrolyte leads to the electro-generation of strong oxidant species, such as Cl2 and ClOâ ions, improving the efficiency of treatment at both electrodes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Chemical Engineering - Volume 6, Issue 2, April 2018, Pages 2041-2047
Journal: Journal of Environmental Chemical Engineering - Volume 6, Issue 2, April 2018, Pages 2041-2047
نویسندگان
Ali Baddouh, Guilherme Garcia Bessegato, Mohamed M. Rguiti, Brahim El Ibrahimi, Lahcen Bazzi, Mustapha Hilali, Maria Valnice Boldrin Zanoni,