Please use this identifier to cite or link to this item:
|Title:||Degradation of C.I. Reactive Red 2 (RR2) using ozone-based systems: Comparisons of decolorization efficiency and power consumption||Authors:||Wu, C.-H.
|Keywords:||C.I. Reactive Red 2
|Issue Date:||21-Mar-2008||Citation:||Wu, C.-H., Ng, H.-Y. (2008-03-21). Degradation of C.I. Reactive Red 2 (RR2) using ozone-based systems: Comparisons of decolorization efficiency and power consumption. Journal of Hazardous Materials 152 (1) : 120-127. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jhazmat.2007.06.073||Abstract:||This study investigated the decolorization efficiency of C.I. Reactive Red 2 (RR2) in O3, O3/H2O2, O3/Fe3+, O3/H2O2/Fe3+, UV/O3, UV/O3/Fe3+, UV/O3/H2O2 and UV/O3/H2O2/Fe3+ systems at various pHs. The effective energy consumption constants and the electrical energy per order of pollutant removal (EE/O) were also determined. The experimental results indicated that the energy efficiency was highest at [H2O2]0 = 1000 mg/l and [Fe3+]0 = 25 mg/l. Accordingly, the H2O2 and Fe3+ doses in the hybrid ozone- and UV/ozone-based systems were controlled at these values. This work suggests that the dominant reactant in O3, O3/Fe3+ and O3/H2O2 systems was O3 and that in the O3/H2O2/Fe3+ system was H2O2/Fe3+. The experimental results revealed that the combinations of Fe3+ or H2O2/Fe3+ with O3 at pH 4 and of H2O2 or H2O2/Fe3+ with UV/O3 at pH 4 or 7 yielded a higher decolorization rate than O3 and UV/O3, respectively. At pH 4, the EE/O results demonstrated that the UV/O3/H2O2/Fe3+ system reduced 85% of the energy consumption compared with the UV/O3 system. Moreover, the O3/H2O2/Fe3+ system reduced 62% of the energy consumption compared with the O3 system. At pH 7, the EE/O results revealed that the UV/O3/H2O2/Fe3+ system consumed half the energy of the UV/O3 system. © 2007 Elsevier B.V. All rights reserved.||Source Title:||Journal of Hazardous Materials||URI:||http://scholarbank.nus.edu.sg/handle/10635/87477||ISSN:||03043894||DOI:||10.1016/j.jhazmat.2007.06.073|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Mar 1, 2021
WEB OF SCIENCETM
checked on Mar 1, 2021
checked on Feb 28, 2021
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.