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1588652 
Journal Article 
Optimization of UV-promoted peroxydisulphate oxidation of CI Basic Blue 3 using response surface methodology 
Khataee, AR 
2010 
Yes 
Environmental Technology
ISSN: 0959-3330
EISSN: 1479-487X 
31 
1 
73-86 
20232681 
WOS:000273817600009 
In this paper photooxidative decolorization of C.I. Basic
Blue 3 (BB3), by a UV/peroxydisulphate process is reported. Response surface methodology (RSM)
was employed to investigate the effects of different operational parameters on the photooxidative
decolorization efficiency. The variables investigated were the reaction time, initial dye
concentration, initial S(2)O(8)(2-) concentration and the distance of the solution from the UV
lamp. Central composite design (CCD) was used for the optimization of the UV/peroxydisulphate
process. Photooxidative decolorization efficiency was enhanced by the addition of an optimum
amount of peroxydisulphate. An increase in UV light intensity increased the photooxidative
decolorization efficiency. A decrease in photooxidative decolorization efficiency with increasing
initial BB3 concentration was observed. Predicted values of photooxidative decolorization
efficiency were found to be in good agreement with experimental values (R(2) = 99.06% and Adj-R
(2) = 98.24%), which indicated the suitability of the CCD model employed and the success of CCD
in optimizing the conditions of the UV/peroxydisulphate process. The results of optimization
predicted by the model showed that maximum decolorization efficiency (>98%) was achieved at the
optimum conditions: reaction time 11 min, initial dye concentration 10 mg/L, initial
peroxydisulphate concentration 1.5 mmol/L and distance of UV lamp from the solution 6 cm. The
figure-of-merit electrical energy per order (E(Eo)) was employed to estimate the electrical
energy consumption. 
decolorization; textile dyes; K(2)S(2)O(8); electrical energy consumption; central composite design