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http://dx.doi.org/10.5322/JES.2010.19.9.1143

Effects of Operating Parameters on Electrochemical Degradation of Rhodamine B and Formation of OH Radical Using BDD Electrode  

Park, Young-Seek (Division of Health Science, Daegu University)
Kim, Dong-Seog (Department of Environmental Science, Catholic University of Daegu)
Publication Information
Journal of Environmental Science International / v.19, no.9, 2010 , pp. 1143-1152 More about this Journal
Abstract
The purpose of this study is to degradation of Rhodamine B (RhB, dye) and N, N-Dimethyl-4-nitrosoaniline (RNO, indicator of the electro-generation of OH radical) in solution using boron doped diamond (BDD) electrode. The effects of applied current (0.2~1.0 A), electrolyte type (NaCl, KCl, and $Na_2SO_4$) and electrolyte concentration (0.5~3.0 g/L), solution pH (3~11) and air flow rate (0~4 L/min) were evaluated. Experimental results showed that RhB and RNO removal tendencies appeared with the almost similar thing, except of current. Optimum current for RhB degradation was 0.6 A, however, RNO degradations was increased with increase of applied current. The RhB and RNO degradation of Cl type electrolyte were higher than that of the sulfate type. The RhB and RNO degradation were increased with increase of NaCl concentration and optimum NaCl dosage was 2.5 g/L. The RhB and RNO concentrations were not influenced by pH under pH 7. Optimum air flow rate for the oxidants generation and RhB and RNO degradation were 2 L/min. Initial removal rate of electrolysis process was expressed Langmuir - Hinshelwood equation, which is used to express the initial removal rate of UV/$TiO_$2 process.
Keywords
Boron doped diamond electrode; Hydroxyl radical; Dye oxidation; Current; Electrolyte;
Citations & Related Records
Times Cited By KSCI : 9  (Citation Analysis)
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