Application of response surface methodology and central composite design for the optimization of textile dye degradation by wet air oxidationReport as inadecuate




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International Journal of Industrial Chemistry

, 3:24

First Online: 02 October 2012Received: 28 May 2012Accepted: 31 August 2012

Abstract

BackgroundThe present study is aimed at investigating the degradation of azo dye solution of AR 274 by wet air oxidation conditions. The central composite design matrix and response surface methodology were applied in designing the experiments to evaluate the interactive effects of the three most important operating variables. Thus, the interactive effects of oxygen pressure 3.0 to 5.0 MPa, temperature 100°C to 250°C, and time 30 to 90 min on the degradation of dye were investigated.

ResultsThe predicted values were found to be in good agreement with the experimental values R = 0.9981 and Adj-R = 0.9965, which define the propriety of the model and the achievement of CCD in the optimization of WAO process.

ConclusionsIntermediates of dye degradation were detected by GC-MS, the possible degradation mechanism for the WAO of dye was discussed, and the probable degradation pathway was deduced.

KeywordsDegradation Response surface methodology Central composite design Wet air oxidation AbbreviationsANOVAanalysis of variance

AR 274Acid Red 274

AOPsadvanced oxidation processes

CCDcentral composite design

CWAOcatalytic wet air oxidation

GC-MSgas chromatography–mass spectrometry

RSMresponse surface methodology

WAOwet air oxidation

TOCtotal organic carbon.

Electronic supplementary materialThe online version of this article doi:10.1186-2228-5547-3-24 contains supplementary material, which is available to authorized users.

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Author: Muhammet Demirel - Berkant Kayan

Source: https://link.springer.com/







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