Decolorization and mineralization of a phthalocyanine dye C.I. Direct Blue 199 using UV/H2O2 process.
In this study, the successful decolorization and mineralization of phthalocyanine dye (C.I. Direct Blue 199, DB 199) by an advanced oxidation process (AOP), UV/H2O2, were observed while the experimental variables such as hydrogen peroxide dosage, UV dosage, initial dye concentration and pH were evaluated. The operating conditions for 90% decolorization of C.I. DB 199 and 74% removal of total organic carbon (TOC) were obtained for initial dye concentration of 20 mgl(-1), hydrogen peroxide dosage of 116.32 mM, UV dosage of 560 W and pH of 8.9 in 30 min. The pseudo-first order rate constant is a linear function of reverse of initial dye concentration. They linearly increased by incrementing UV dosage, yet were non-linear enhancement by increasing the hydrogen peroxide concentration. A higher pseudo-first order rate constant about 0.15 min(-1) was observed while hydrogen peroxide concentration within 5.82-116.32 mM. Moreover, the decolorization of C.I. DB 199 was observed to be more difficult than that of an azo dye, C.I. Acid Black 1, under the same operating conditions.
Shu
Hung-Yee
HY
Department of Environmental Engineering, Hungkuang University, No. 34 Chung-Chie Road, Shalu, Taichung County, Taiwan 433, ROC. hyshu@sunrise.hk.edu.tw
Chang
Ming-Chin
MC
D001391:Azo Compounds / Q000737:chemistry; D003116:Color; D006861:Hydrogen Peroxide; D006863:Hydrogen-Ion Concentration; D007211:Indoles / Q000737:chemistry*; D007220:Industrial Waste / Q000517:prevention & control*; D007700:Kinetics; D009942:Organometallic Compounds / Q000737:chemistry*; D009994:Osmolar Concentration; D010777:Photochemistry / Q000379:methods; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical; D014877:Water Pollution, Chemical / Q000517:prevention & control*
D001391:Azo Compounds; C507902:C.I. Direct Blue 199; D007211:Indoles; D007220:Industrial Waste; D009942:Organometallic Compounds; D014874:Water Pollutants, Chemical; C015445:copper phthalocyanine; D006861:Hydrogen Peroxide