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KMID : 1024520090180111225
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Journal of the Environmental Sciences
2009 Volume.18 No. 11 p.1225 ~ p.1234
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Application of the Central Composite Design and Response Surface Methodology to the Treatment of Dye Using Electrochemical Oxidation
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Kim Dong-Seog
Park Young-Seek
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Abstract
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The aim of this research was to apply experimental design methodology in the optimization condition of electrochemical oxidation of Rhodamine B(RhB). The reactions of electrochemical oxidation were mathematically described as a function of parameters amounts of current, NaCl dosage, pH and time being modeled by the use of the central composite design, which was used for fitting quadratic response surface model. The application of response surface methodology using central composite design(CCD) technique yielded the following regression equation, which is an empirical relationship between the removal efficiency of RhB and test variable in actual variables: RhB removal (%) = 3.977 + 23.279?Current + 49.124?NaCl － 5.539?pH － 8.863 ?time － 22.710?Current?NaCl + 5.409?Current?time + 2.390?NaCl?time + 1.061?pH?time － 0.570?time2. The model predicted also agree with the experimentally observed result(R2 = 91.9%).
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KEYWORD
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Response surface methodology, RSM, Electrochemical oxidation, Central Composite Design, CCD, Analysis of variance, ANOVA, Dye, Optimization
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