SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2015, Vol. 23 ›› Issue (4): 704-709.DOI: 10.1016/j.cjche.2015.01.004

• 能源、资源与环境技术 • 上一篇    下一篇

Anaerobic biodegradation of RDX and HMX with different co-substrates

Zongkuan Liu, Lei Zhang, Yonghong Liu, Yanling He   

  1. 1 Department of Environmental Science and Technology, School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an 710049, China;
    2 Department of Chemical Engineering, Xi'an Jiaotong University, Xi'an 710049, China;
    3 Department of Environmental and Chemical Engineering, Xi'an Polytechnic University, Xi'an 710048, China
  • 收稿日期:2013-05-08 修回日期:2014-01-15 出版日期:2015-04-28 发布日期:2015-05-13
  • 通讯作者: Zongkuan Liu
  • 基金资助:

    Supported by the National Natural Science Foundation of China (2117619) and Major Project of Innovation of Science and Technology of Shaanxi Province (2011KTZB03-03-01).

Anaerobic biodegradation of RDX and HMX with different co-substrates

Zongkuan Liu, Lei Zhang, Yonghong Liu, Yanling He   

  1. 1 Department of Environmental Science and Technology, School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an 710049, China;
    2 Department of Chemical Engineering, Xi'an Jiaotong University, Xi'an 710049, China;
    3 Department of Environmental and Chemical Engineering, Xi'an Polytechnic University, Xi'an 710048, China
  • Received:2013-05-08 Revised:2014-01-15 Online:2015-04-28 Published:2015-05-13
  • Contact: Zongkuan Liu
  • Supported by:

    Supported by the National Natural Science Foundation of China (2117619) and Major Project of Innovation of Science and Technology of Shaanxi Province (2011KTZB03-03-01).

摘要: Simulated wastewater of hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) and octahydro-1,3,5,7-tetranitro-1,3,5,7- tetrazocine (HMX)was treated under anaerobic conditions with co-substrates such as ammonium chloride, dex-trose, sodium acetic, sodium nitrate and sulfate. The results showed that with nitrogen compounds such as ammonium chloride added as co-substrate, no significant change was observed, indicating that the molar ratio of N/C for RDX and HMX is sufficient for biodegradation.With the addition of dextrose and acetate to the system, biodegradation efficiency was enhanced greatly. For example, with dextrose as the co-substrate, degradation efficiency of 99.1% and 98.5% was achieved for RDX and HMX, respectively, after treatment for 7 days. When sodiumacetic was used as the co-substrate, the enhancement of degradation percentage was similar, but was not as high as that with dextrose, indicating the selectivity of RDX and HMX to co-substrate during anaerobic degradation. With sodium nitrate as the co-substrate, the degradation efficiency of RDX or HMX decreased with the increase of salt concentration. Sodium sulfate has no significant effect on the biodegradation of RDX and HMX. A well-selected co-substrate should be employed in applications for degradation of RDX and HMX wastewaters.

关键词: Anaerobic biodegradation, Co-substrate, Octahydro-1, 3, 5, 7-tetranitro-1, 3, 5, 7- tetrazocine, Hexahydro-1, 3, 5-trinitro-1, 3, 5-triazine, Wastewater

Abstract: Simulated wastewater of hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) and octahydro-1,3,5,7-tetranitro-1,3,5,7- tetrazocine (HMX)was treated under anaerobic conditions with co-substrates such as ammonium chloride, dex-trose, sodium acetic, sodium nitrate and sulfate. The results showed that with nitrogen compounds such as ammonium chloride added as co-substrate, no significant change was observed, indicating that the molar ratio of N/C for RDX and HMX is sufficient for biodegradation.With the addition of dextrose and acetate to the system, biodegradation efficiency was enhanced greatly. For example, with dextrose as the co-substrate, degradation efficiency of 99.1% and 98.5% was achieved for RDX and HMX, respectively, after treatment for 7 days. When sodiumacetic was used as the co-substrate, the enhancement of degradation percentage was similar, but was not as high as that with dextrose, indicating the selectivity of RDX and HMX to co-substrate during anaerobic degradation. With sodium nitrate as the co-substrate, the degradation efficiency of RDX or HMX decreased with the increase of salt concentration. Sodium sulfate has no significant effect on the biodegradation of RDX and HMX. A well-selected co-substrate should be employed in applications for degradation of RDX and HMX wastewaters.

Key words: Anaerobic biodegradation, Co-substrate, Octahydro-1,3,5,7-tetranitro-1,3,5,7- tetrazocine, Hexahydro-1,3,5-trinitro-1,3,5-triazine, Wastewater