采用紫外光/过氧化氢工艺对酞菁染料C.I.直接蓝199进行脱色和矿化处理。
Decolorization and mineralization of a phthalocyanine dye C.I. Direct Blue 199 using UV/H2O2 process.
作者信息
Shu Hung-Yee, Chang Ming-Chin
机构信息
Department of Environmental Engineering, Hungkuang University, No. 34 Chung-Chie Road, Shalu, Taichung County, Taiwan 433, ROC.
出版信息
J Hazard Mater. 2005 Oct 17;125(1-3):96-101. doi: 10.1016/j.jhazmat.2005.05.016.
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.
在本研究中，通过高级氧化工艺（AOP）即紫外光/过氧化氢（UV/H₂O₂），观察到酞菁染料（C.I.直接蓝199，DB 199）实现了成功脱色和矿化，同时评估了过氧化氢用量、紫外光剂量、初始染料浓度和pH值等实验变量。在初始染料浓度为20 mg/L⁻¹、过氧化氢用量为116.32 mM、紫外光剂量为560 W以及pH值为8.9的条件下，30分钟内实现了C.I. DB 199 90%的脱色率和74%的总有机碳（TOC）去除率。伪一级反应速率常数是初始染料浓度倒数的线性函数。它们随紫外光剂量的增加呈线性增加，但随过氧化氢浓度的增加呈非线性增强。当过氧化氢浓度在5.82 - 116.32 mM范围内时，观察到较高的伪一级反应速率常数约为0.15 min⁻¹。此外，在相同操作条件下，观察到C.I. DB 199的脱色比偶氮染料C.I.酸性黑1更困难。
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