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Che Ran, Hao Zhi, Ye Zhengfang. Treatment of hexanitrostilbene wastewater by vacuum distillation coupling in micro-electrolysis[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1405-1410.
Citation: Che Ran, Hao Zhi, Ye Zhengfang. Treatment of hexanitrostilbene wastewater by vacuum distillation coupling in micro-electrolysis[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1405-1410.
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Treatment of hexanitrostilbene wastewater by vacuum distillation coupling in micro-electrolysis

  • 1.

    Department of Environmental Engineering, Peking University, Beijing 100871, China

  • 2.

    School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China

  • 3.

    China North Industries Group Corporation, Beijing 100821, China

  • Received Date: 27/03/2012
    Accepted Date: 18/02/2012
    Available Online: 09/04/2013
    Fund Project:
  • The hexanitrostilbene (HNS) wastewater quality was analyzed, which was the product washing wastewater from the second HNS producing process. The result showed that it contained massive pyridine and variety of bromo and nitro-aromatic compounds. The treatment of HNS wastewater by vacuum distillation coupling in micro-electrolysis was carried out, and the process parameters were optimized. When it was distillated at 70℃, the TOC removal rate was 44% when the volume rate of the residual liquid was reduced to 86.9% of the original volume of the wastewater. And the pyridine concentration of the distillate collected before was between 10%~31.9%(V/V). The vacuum distillation could collect pyridine and reduce the TOC in the wastewater at the same time. After vacuum distillation, the majority of the bromo and nitro-aromatic compounds were left in the residual liquid, and it was treated by micro-electrolysis. The TOC removal efficiency of the wastewater reached 33% under the condition of a 25 g/L zinc dosage, 1∶1 mass ratio of zinc and active carbon, after 60 min reaction when its initial pH was 1.0. The quality of effluent could be improved after multi-stage micro-electrolysis process.
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Treatment of hexanitrostilbene wastewater by vacuum distillation coupling in micro-electrolysis

  • Received Date: 27/03/2012
  • Accepted Date: 18/02/2012
  • Available Online: 09/04/2013
Fund Project:

Abstract: The hexanitrostilbene (HNS) wastewater quality was analyzed, which was the product washing wastewater from the second HNS producing process. The result showed that it contained massive pyridine and variety of bromo and nitro-aromatic compounds. The treatment of HNS wastewater by vacuum distillation coupling in micro-electrolysis was carried out, and the process parameters were optimized. When it was distillated at 70℃, the TOC removal rate was 44% when the volume rate of the residual liquid was reduced to 86.9% of the original volume of the wastewater. And the pyridine concentration of the distillate collected before was between 10%~31.9%(V/V). The vacuum distillation could collect pyridine and reduce the TOC in the wastewater at the same time. After vacuum distillation, the majority of the bromo and nitro-aromatic compounds were left in the residual liquid, and it was treated by micro-electrolysis. The TOC removal efficiency of the wastewater reached 33% under the condition of a 25 g/L zinc dosage, 1∶1 mass ratio of zinc and active carbon, after 60 min reaction when its initial pH was 1.0. The quality of effluent could be improved after multi-stage micro-electrolysis process.

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