Chang Ming-Chin, Shu Hung-Yee, Yu Hsin-Hung
Department of Environmental Engineering, Hungkuang University, No. 34 Chung-Chie Rd., Shalu, Taichung County, Taiwan 433, ROC.
J Hazard Mater. 2006 Dec 1;138(3):574-81. doi: 10.1016/j.jhazmat.2006.05.088. Epub 2006 Jun 3.
The zero-valent iron (ZVI) reduction succeeds for decolorization, while UV/H(2)O(2) oxidation process results into mineralization, so that this study proposed an integrated technique by reduction coupling with oxidation process in order to acquire simultaneously complete both decolorization and mineralization of C.I. Acid Black 24. From the experimental data, the zero-valent iron addition alone can decolorize the dye wastewater yet it demanded longer time than ZVI coupled with UV/H(2)O(2) processes (Red-Ox). Moreover, it resulted into only about 30% removal of the total organic carbon (TOC), which was capable to be effectively mineralized by UV/H(2)O(2) process. The proposed sequential ZVI-UV/H(2)O(2) integration system cannot only effectively remove color and TOC in AB 24 wastewater simultaneously but also save irradiation power and time demand. Furthermore, the decolorization rate constants were about 3.77-4.0 times magnitude comparing with that by UV/H(2)O(2) process alone.
零价铁（ZVI）还原可成功实现脱色，而UV/H₂O₂氧化过程则导致矿化，因此本研究提出了一种还原与氧化过程耦合的集成技术，以便同时实现C.I.酸性黑24的完全脱色和矿化。从实验数据来看，单独添加零价铁可以使染料废水脱色，但所需时间比ZVI与UV/H₂O₂过程（还原-氧化）耦合时长。此外，它仅导致约30%的总有机碳（TOC）去除，而UV/H₂O₂过程能够有效地将其矿化。所提出的顺序ZVI-UV/H₂O₂集成系统不仅能同时有效去除AB 24废水中的颜色和TOC，还能节省辐照功率和时间需求。此外，脱色速率常数与单独使用UV/H₂O₂过程相比约为其3.77 - 4.0倍。
