Journal of Radiation Research and Radiation Proces ›› 2017, Vol. 35 ›› Issue (6): 60301-060301.doi: 10.11889/j.1000-3436.2017.rrj.35.060301

• RADIATION CHEMISTRY • Previous Articles     Next Articles

Degradation of orange Ⅱ by “γ ray-BaF2-nano TiO2” radiocatalysis system

QI Guangxia1,2,3, ZHANG Xi1,2, ZHANG Simeng1,2, LI Lei3, WANG Bangda3, REN Lianhai1,2, WANG Yi3, WANG Wei3,4   

  1. 1 Department of Environmental Science and Engineering, Beijing Technology and Business University, Beijing 100048, China;
    2 Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry, Beijing Technology and Business University, Beijing 100048, China;
    3 Key Laboratory for Solid Waste Management and Environment Safety Tsinghua University, Ministry of Education of China, Beijing 100084, China;
    4 Beijing Engineering Research Center of Biogas Centralized Utilization Tsinghua University, Beijing 100084, China
  • Received:2017-06-23 Revised:2017-07-23 Online:2017-12-20 Published:2017-12-20
  • Supported by:

    Supported by China Postdoctoral Science Foundation (No. 2014M560983), Key Laboratory for Solid Waste Management and Environment Safety (Tsinghua University), Ministry of Education of China (No. SWMES201605), and Beijing Technology and Business University (No. QNJJ2016-21)

Abstract:

In order to realize the proper treatment of wastewater containing azo dyes, a silica-base supported BaF2-nano-TiO2 composite (hereinafter called the composite) was prepared by a three-step synthetic procedure and utilized for the decolorization and degradation of orange Ⅱ in aqueous solution. It was found that the irradiation time and solution pH value was important parameter that ensured the degradation effect of γ-rays at low dose. The optimal doping ratio of BaF2 to nano-TiO2 was determined to be 1:1 (mBaF2:mTiO2). Furthermore, it was found that a highly reductive atmosphere (N2) favored the formation of hydroxyl radicals (·OH), which were responsible for the efficient degradation and mineralization of orange Ⅱ. The decolorization rate of the orange Ⅱ, Reactive black 5 and Reactive blue 222 dyes solution by the radiocatalysis system was 96.8%, 95.3% and 99.9%, respectively; and total organic carbon (TOC) removal rate of the orange Ⅱ, Reactive black 5 and Reactive blue 222 dyes solution achieved 92.5%, 40.2% and 98.6%, respectively. Thus, it was shown that the composite could be applied to the treatment of wastewater containing azo dye mixtures. The results of this study extend the technical applications of the TiO2 photocatalytic oxidation technology.

Key words: Ionizing radiation, Radiocatalysis, Scintillator, Composite material, Azo dye

CLC Number: 

  • X522