SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2018, Vol. 26 ›› Issue (7): 1444-1450.DOI: 10.1016/j.cjche.2018.01.018

• Separation Science and Engineering • 上一篇    下一篇

Degradation and mineralization of aniline by O3/Fenton process enhanced using high-gravity technology

Yuejiao Qin1, Shuai Luo2, Shuo Geng1, Weizhou Jiao1, Youzhi Liu1   

  1. 1 Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan, 030051, China;
    2 Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
  • 收稿日期:2017-10-26 修回日期:2018-01-06 出版日期:2018-07-28 发布日期:2018-08-16
  • 通讯作者: Weizhou Jiao,E-mail address:zbdxjwz@nuc.edu.cn
  • 基金资助:

    Supported by the National Natural Science Foundations of China (U1610106) and Shanxi Excellent Talent Science and Technology Innovation Project (201705D211011), Specialized Research Fund for Sanjin Scholars Program of Shanxi Province and North University of China Fund for Distinguished Young Scholars.

Degradation and mineralization of aniline by O3/Fenton process enhanced using high-gravity technology

Yuejiao Qin1, Shuai Luo2, Shuo Geng1, Weizhou Jiao1, Youzhi Liu1   

  1. 1 Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan, 030051, China;
    2 Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
  • Received:2017-10-26 Revised:2018-01-06 Online:2018-07-28 Published:2018-08-16
  • Contact: Weizhou Jiao,E-mail address:zbdxjwz@nuc.edu.cn
  • Supported by:

    Supported by the National Natural Science Foundations of China (U1610106) and Shanxi Excellent Talent Science and Technology Innovation Project (201705D211011), Specialized Research Fund for Sanjin Scholars Program of Shanxi Province and North University of China Fund for Distinguished Young Scholars.

摘要: The degradation and mineralization of aniline (AN) using ozone combined with Fenton reagent (O3/Fenton) in a rotating packed bed (RPB) was proposed in this study, and the process (RPB-O3/Fenton) was compared with conventional O3/Fenton in a stirred tank reactor (STR-O3/Fenton) or single ozonation in an RPB (RPB-O3). Effects of high gravity factor, H2O2 dosage, H2O2 dosing method and initial pH on the AN mineralization efficiency were investigated in the RPB-O3/Fenton process. In addition, the behavior of Fe(Ⅱ) was monitored at different H2O2 dosing methods and pH values. Finally, the optimal operation conditions were determined with high gravity factor of 100, initial pH of 5, Fe(Ⅱ) concentration of 0.8 mmol·L-1 and H2O2 dosage of 2.5 ml. Under these conditions, for aniline wastewater at the volume of 1 L and concentration of 200 mg·L-1, a fast and thorough decay of AN was conducted in 10 min, and the TOC removal efficiency reached 89% in 60 min. The main intermediates of p-benzoquinone, nitrobenzene, maleic acid and oxalic acid were identified by liquid chromatography/mass spectroscopy (LC/MS), and the degradation pathways of AN in RPB-O3/Fenton system were proposed based on experimental evidence. It could be envisioned that high-gravity technology combined with O3/Fenton processes would be promising in the rapid and efficient mineralization of wastewater.

关键词: O3/Fenton process, High-gravity technology, Aniline, Degradation mechanisms

Abstract: The degradation and mineralization of aniline (AN) using ozone combined with Fenton reagent (O3/Fenton) in a rotating packed bed (RPB) was proposed in this study, and the process (RPB-O3/Fenton) was compared with conventional O3/Fenton in a stirred tank reactor (STR-O3/Fenton) or single ozonation in an RPB (RPB-O3). Effects of high gravity factor, H2O2 dosage, H2O2 dosing method and initial pH on the AN mineralization efficiency were investigated in the RPB-O3/Fenton process. In addition, the behavior of Fe(Ⅱ) was monitored at different H2O2 dosing methods and pH values. Finally, the optimal operation conditions were determined with high gravity factor of 100, initial pH of 5, Fe(Ⅱ) concentration of 0.8 mmol·L-1 and H2O2 dosage of 2.5 ml. Under these conditions, for aniline wastewater at the volume of 1 L and concentration of 200 mg·L-1, a fast and thorough decay of AN was conducted in 10 min, and the TOC removal efficiency reached 89% in 60 min. The main intermediates of p-benzoquinone, nitrobenzene, maleic acid and oxalic acid were identified by liquid chromatography/mass spectroscopy (LC/MS), and the degradation pathways of AN in RPB-O3/Fenton system were proposed based on experimental evidence. It could be envisioned that high-gravity technology combined with O3/Fenton processes would be promising in the rapid and efficient mineralization of wastewater.

Key words: O3/Fenton process, High-gravity technology, Aniline, Degradation mechanisms