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Volume 6 Issue 1
Mar.  2021
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Article Navigation >  Journal of Mining Science and Technology  > 2021  >  6(1): 109-114
Peng Siwei, He Xuwen, Liu Haiyang, Bai Yuyong, Gu Xiaobing, Li Yehong. Study on the removal of benzenes pollutants from coal chemical wastewater based on ozonation technology[J]. Journal of Mining Science and Technology, 2021, 6(1): 109-114. doi: 10.19606/j.cnki.jmst.2021.01.012
Citation: Peng Siwei, He Xuwen, Liu Haiyang, Bai Yuyong, Gu Xiaobing, Li Yehong. Study on the removal of benzenes pollutants from coal chemical wastewater based on ozonation technology[J]. Journal of Mining Science and Technology, 2021, 6(1): 109-114. doi: 10.19606/j.cnki.jmst.2021.01.012
shu

Study on the removal of benzenes pollutants from coal chemical wastewater based on ozonation technology

doi: 10.19606/j.cnki.jmst.2021.01.012
  • 1.

    Datang Environmental Industry Group Co., Ltd., Beijing 100097, China

  • 2.

    School of Chemical & Environmental Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China

  • Received Date: 2020-03-31
  • Rev Recd Date: 2020-08-31
  • Publish Date: 2021-02-01
    Abstract
  • Benzene, toluene, ethylbenzene and xylene(BTEX)are typical organic pollutants in coal chemical wastewater, which were difficult to be biodegraded under normal conditions, and were often removed by chemical means in the actual production process. This study based on the strong oxidizing free radicals generated in the process of ozone oxidation, used ozone oxidation technology to remove BTEX in simulated wastewater. The effects of pH value, temperature, ozone dosage and ozone dosing mode on the degradation of BTEX were investigated. The reaction mechanism of degradation by ozone was explored by using tertiary butanol as hydroxyl radical inhibitor and free radical dismutase as superoxide radical inhibitor. The results showed that the degradation effect of BTEX was the best when pH was 8, reaction temperature was 30 ℃, ozone dosage was 3.5 g/L and ozone dosage mode was countercurrent. The existence of superoxide radicals and hydroxyl radicals were the fundamental reason for the effective removal of BTEX from water by ozonization.
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