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Photocatalytic process by immobilized carbon black/ZnO nanocomposite for dye removal from aqueous medium: Optimization by response surface methodology

Authors
Journal
Journal of Industrial and Engineering Chemistry
1226-086X
Publisher
Elsevier
Publication Date
Volume
20
Issue
4
Identifiers
DOI: 10.1016/j.jiec.2013.09.003
Keywords
  • Photocatalysis
  • Zno Nanoparticles
  • Carbon Black
  • Experimental Design
Disciplines
  • Design

Abstract

Abstract A rectangular photo-reactor equipped with carbon black (CB)/ZnO nanocomposite film was used for photodegradation of methyl orange. Central composite design was used for evaluation of the effects of initial dye concentration, reaction time, CB/ZnO ratio and initial pH. The high correlation coefficients (R2=0.954 and adjusted R2=0.912) obtained by analysis of variance (ANOVA) demonstrated close fit between the predicted and experimental values. The initial dye concentration, reaction time, CB/ZnO ratio and initial pH were 13mg/L, 95min, 0.05 and 5, respectively for 80% decolorization efficiency. The result of TOC analysis showed that the process allowed 55.79% mineralization under optimized conditions.

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