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.
Department of Environmental Engineering, Hungkuang University, No. 34 Chung-Chie Road, Shalu, Taichung County, Taiwan 433, ROC. hyshu@sunrise.hk.edu.tw
Hung-Yee
HY
Shu
Ming-Chin
MC
Chang
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