高等学校化学学报 ›› 2019, Vol. 40 ›› Issue (9): 1964.doi: 10.7503/cjcu20190088

• 物理化学 • 上一篇    下一篇

生物电化学系统降解多环芳烃萘及微生物群落研究

华涛,李胜男,李凤祥(),王浩楠   

  1. 南开大学环境科学与工程学院, 环境污染过程与基准教育部重点实验室,天津市城市生态环境修复与污染防治重点实验室, 天津 300350
  • 收稿日期:2019-02-01 出版日期:2019-09-10 发布日期:2019-06-12
  • 通讯作者: 李凤祥 E-mail:lifx@nankai.edu.cn
  • 基金资助:
    国家自然科学基金(31570504);天津市自然科学基金(16JCYBJC22900)

Treatment of Naphthalene by Microbial Electrochemical System and the Analysis of Microbial Communities

HUA Tao,LI Shengnan,LI Fengxiang(),WANG Haonan   

  1. College of Environmental Science and Engineering, Key Laboratory of Pollution Processes and Environmental Criteria of Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300350, China
  • Received:2019-02-01 Online:2019-09-10 Published:2019-06-12
  • Contact: LI Fengxiang E-mail:lifx@nankai.edu.cn
  • Supported by:
    ? Supported by the National Natural Science Foundation of China(31570504);the Natural Science Foundation of Tianjin, China(16JCYBJC22900)

摘要:

采用单室空气阴极微生物燃料电池(MFC)反应器构型, 以不同浓度萘为基底物质, 考察MFC的产电性能、 萘降解率、 化学需氧量(COD)和总有机碳含量(TOC)降解率及MFC阴阳极微生物活性和多样性. 结果表明, 循环伏安曲线受不同浓度萘的影响变化较为明显, 随着萘浓度的增大, 最大功率密度呈下降趋势, 且萘对MFC的阴极电极电势影响较大; 当萘的浓度为15 mg/L时, MFC最大功率密度可达(645.841±28.08) mW/m 2; 对萘的降解率高达100%, 且MFC对COD和TOC的降解率随着萘浓度的提高而增大, 但是增大的速率逐渐减小. 对MFC阳极微生物膜进行高通量测序发现, Geobacter是优势菌属, 相对丰度达81%, 阴极主要以Aquamicrobium为主.

关键词: 微生物燃料电池, 萘, 降解率, 功率密度曲线, 极化曲线, 高通量测序

Abstract:

Naphthalene of different concentrations(15, 30, 60 mg/L) were adopted as substrate for single-chamber air cathode microbial fuel cell(MFC) reactors. The electricity production performance(power density, polarization curve and cyclic voltammetry curve), naphthalene degradation rate, chemical oxygen demand(COD) and total organic carbon(TOC) degradation rate, and anode and cathode microbial diversity were investigated. The results show that the cyclic voltammetry curve was apparently affected by different concentrations of naphthalene; with the increase in naphthalene concentration, the maximum power density showed a downward trend, and naphthalene had a great influence on the cathode potential of MFC; the maximum power density of naphthalene could reach (645.841±28.08) mW/m 2; the degradation rate of naphthalene by MFC was as high as 100%. Moreover, the degradation rate of COD and TOC by MFC increased with the increase of naphthalene concentration, but the increase rate decreased gradually. On this basis, high-throughput sequencing of MFC anode microbial membranes revealed that Geobacter was a dominant genus with a relative abundance of 81%, while the cathode was mainly based on Aquamicrobium.

Key words: Microbial fuel cell, Naphthalene, Degradation rate, Power density curve, Polarization curve, High-throughput sequencing

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