Page 184 - 《精细化工》2022年第12期

第 39 卷第 12 期 精 细 化 工 Vol.39, No.12
2 022 年 12 月 FINE CHEMICALS Dec. 2022

水处理技术与环境保护
Cu O/rGO 修饰阴极对 MFC 产电脱氮性能及
2

菌群结构的影响

1*
1
1
1
2
1
郭金燕 ，马志远 ，杨佳琪 ，廉 静 ，牛艳艳 ，岳 琳
（1. 河北科技大学 环境科学与工程学院，河北省污染防治生物技术实验室，河北 石家庄 050018；2. 河
北省地质环境监测院，河北省地质资源环境监测与保护重点实验室，河北 石家庄 052460）
摘要：通过还原法制备了 Cu 2 O/还原氧化石墨烯（Cu 2 O/rGO）复合材料，采用 SEM、FTIR、EDS、XRD、
XPS、氮气吸附-脱附、循环伏安曲线对其结构和氧还原性能进行了表征和测试。将 Cu 2 O/rGO 复合材料负
载于碳布制得了 Cu 2 O/rGO 阴极，以硝酸盐作为模型污染物，将其作为微生物燃料电池（MFC）的阴极，探
究其对 MFC 产电脱氮性能和微生物菌落结构的影响。结果表明，Cu 2 O/rGO 复合材料具有大量的介孔结构和良
好的氧还原可逆性。与 Pt/C 阴极相比，Cu 2 O/rGO 阴极的交换电流密度升高了 47.77%，电荷转移阻抗降低了
–
2
65.53%。Cu 2 O/rGO-MFC 在处理 NO 3 -N 废水时平均最大输出电压为 662.54 mV、最大功率密度为 26.27 mW/cm 、
–
2
平均库仑效率为 32.02%、NO 3 -N 去除速率为 83.33 mg/(L·h)，均高于 Pt/C-MFC〔485.33 mV、16.98 mW/cm 、7.38%、
41.67 mg/(L·h)〕。Cu 2 O/rGO-MFC 阴极生物膜中反硝化关键酶活性和胞外聚合物含量增加，同时，功能性微
生物 Betaproteobacteria 和 Alphaproteobacteria 纲的丰度分别较 Pt/C-MFC 增加了 35.66%和 36.96%。
关键词：Cu 2 O/rGO 复合材料；微生物燃料电池；电化学性能；输出电压；脱氮；微生物群落；水处理技术
中图分类号：X703；TM911.45 文献标识码：A 文章编号：1003-5214 (2022) 12-2550-12

Effects of Cu 2O/rGO modified cathode on MFC electricity generation,

denitrification performance and bacterial community structure

1
2
1
1
1*
1
GUO Jinyan , MA Zhiyuan , YANG Jiaqi , LIAN Jing , NIU Yanyan , YUE Lin
（1. College of Environmental Sciences and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018,
Hebei, China; 2. Key Laboratory of Geological Resources and Environment Monitoring and Protection of Hebei Province,
Hebei Institute of Geological Environment Monitoring, Shijiazhuang 052460, Hebei, China）
Abstract: Cuprous oxide/reduced graphene oxide (Cu 2O/rGO) composites were synthesized via reduction
methods, characterized and tested by SEM, FTIR, EDS, XRD, XPS, N 2 adsorption-desorption and cyclic
voltammetry curves for analysis on structure and oxygen reduction performance. Cu 2O/rGO cathode was
then prepared by loading Cu 2O/rGO composites obtained on carbon fabric and used as the cathode of
microbial fuel cell (MFC) with nitrate as model pollutant, followed by investigation on the effect of
Cu 2O/rGO cathode on the performance of MFC for electricity generation, nitrogen removal and the
structure of microbial colony. The results showed that Cu 2O/rGO composites had a mesopore-rich structure
and good redox reversibility. Compared with those of Pt/C cathode, the exchange current density of
Cu 2O/rGO cathode increased by 47.77%, while the charge transfer impedance decreased by 65.53%.
Moreover, Cu 2O/rGO-MFC exhibited higher average maximum output voltage (662.54 mV), maximum
2
–
power density (26.27 mW/cm ), NO 3 -N removal rate [83.33 mg/(L·h)], and average coulomb efficiency
2
(32.02%) than Pt/C-MFC [485.33 mV, 16.98 mW/cm , 7.38%, 41.67 mg/(L·h)]. Meanwhile, the activity of
denitrification key enzymes and content of extracellular polymer in Cu 2O/rGO-MFC cathode biofilm were

收稿日期：2022-04-14; 定用日期：2022-07-06; DOI: 10.13550/j.jxhg.20220351
基金项目：国家自然科学基金（51678387）；河北省人才工程资助项目（A201902019）
作者简介：郭金燕（1995—），女，硕士生，E-mail：962708136@qq.com。联系人：廉 静（1980—），女，教授，E-mail：ningjingzhiyuan98@
163.com。