核桃壳生物炭电极在微生物燃料电池中的产电性能及其对污染物的去除性能  

Electricity production and pollutant removal performance of walnut shell biochar electrode in microbial fuel cell

作　　者：陈传杰 张铭川[1] 陈熙[1] 闫佳丽 李海波[1] 徐新阳[1] CHEN Chuanjie;ZHANG Mingchuan;CHEN Xi;YAN Jiali;LI Haibo;XU Xinyang(School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学资源与土木工程学院,沈阳110819

出　　处：《环境工程学报》2022年第10期3281-3290,共10页Chinese Journal of Environmental Engineering

基　　金：国家重点研发课题资助项目(ZX20200121)。

摘　　要：微生物燃料电池(MFC)的电极材料是决定MFC性能的关键。本研究利用核桃壳生物炭制成MFC电极材料,对核桃壳生物炭基电极的制备条件、MFC的产电性能进行了探讨,利用比表面积分析、扫描电镜、拉曼光谱及电极电化学等方法对生物炭电极进行表征。结果表明:最佳电极制备条件为活化时生物炭:氯化锌质量比5:3,真空煅烧温度600℃,生物炭:聚苯胺:热熔胶质量比5:1:4,在进水COD平均值为685 mg·L^(−1)、氨氮平均值为38 mg·L^(−1)、外电阻为1000Ω条件下,MFC的稳定输出电压为0.136 V,最大功率密度达到51 mW·m^(−3),内阻为762Ω,运行7 d后,COD和氨氮的去除率分别可达到85%和88%,以上研究结果为制备有前景的MFC的电极材料提供了参考。The electrode material is the key to determine the performance of microbial fuel cell(MFC).In this study,walnut shell biochar was used to prepare the MFC electrode.Both the preparation conditions of walnut shell biochar based electrode and MFC electricity production performance were discussed.The biochar electrode was characterized by specific surface area analysis scanning electron microscopy,Raman spectroscopy and electrochemistry.The experimental results showed that the optimum fabrication conditions were as follows:the mass ratio of biochar to zinc chloride was 5:3,the vacuum calcination temperature was 600℃,the mass ratio of biochar,polyaniline and hot melt glue was 5:1:4.At the average influent COD concentration of 685 mg·L^(−1),the average ammonia nitrogen concentration of 38 mg·L^(−1) and the external resistance of 1000Ω,the stable output voltage of MFC was 0.136 V,the maximum power density reached 51 mW·m^(−3) and the internal resistance was 762Ω.After 7 days of operation,the removal rates of COD and ammonia nitrogen could reach 85%and 88%,respectively.These results provide a reference for the preparation of the promising MFC electrode materials.

关 键 词：微生物燃料电池 核桃壳生物炭电极 产电 电极 活化 

分 类 号：X703.1[环境科学与工程—环境工程]