摘要
利用腐植酸(HA)与具有较强电容性的纳米Fe_(3)O_(4)颗粒形成的金属化合物(HA@Fe_(3)O_(4))修饰微生物燃料电池(MFC)阳极,探究含有以17α-乙炔基雌二醇(EE2)为代表性类固醇雌激素(SEs)的模拟废水在MFC阳极的降解特性,并对EE2降解过程中MFC的产电特性进行了表征。电化学交流阻抗测试结果表明,与不存在HA@Fe_(3)O_(4)的MFC相比,存在HA@Fe_(3)O_(4)的MFC的欧姆阻抗降低了79.58%,电荷转移阻抗降低了89.60%。循环伏安扫描结果显示,HA@Fe_(3)O_(4)的存在显著增加了阳极板的电容。HA@Fe_(3)O_(4)修饰阳极后MFC最大功率密度可达537.37 mW/m~2。HA@Fe_(3)O_(4)修饰的阳极可显著提高MFC对EE2的去除率,EE2在低浓度下(≤5.0μmol/L)可以介导电子转移,提高MFC的产电性能,进而提高MFC去除EE2的能力,但高浓度(5.0~10.0μmol/L)时会抑制微生物的活性并降低MFC产电效率。
Microbial fuel cell (MFC) anode was modified with a metal compound (HA@Fe_3O_4) formed by humic acid (HA) and nano-Fe_3O_(4) particles with strong capacitive properties.The degradation characteristics of simulated wastewater containing 17α-ethynylestradiol (EE2) as representative steroid estrogen (SEs) at the MFC anode were evaluated,while the electrogenic properties of MFC during EE2 degradation were also characterized.Data from electrochemical AC impedance test showed that,the ohmic impedance and charge-transfer impedance of the MFC with HA@Fe_3O_(4) were reduced by 79.58%and 89.60%,respectively,compared with those of the MFC without HA@Fe_3O_4.Cyclic voltammetry results indicated that the presence of HA@Fe_3O_(4) significantly increased the capacitance of the anode plate.The maximum power density of the MFC after HA@Fe_3O_(4) modification reached up to 537.37 m W/m~2.HA@Fe_3O_(4) modified anode significantly improved the removal rate of EE2 by MFC.EE2 could mediate electron transfer at low concentrations (≤5.0μmol/L) and improve the electrical performance of MFC,thus promoting the ability of MFC to remove EE2.However,high concentration (5.0~10.0μmol/L) could inhibit microbial activity and reduce the electrical generation efficiency of MFC.
作者
王昌鲁
余厂
黄斌
来超超
郭子维
潘学军
WANG Changlu;YU Chang;HUANG Bin;LAI Chaochao;GUO Ziwei;PAN Xuejun(Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650500,Yunnan,China;Bureau of Development and Reform of Hekou Yao Autonomous County,Honghe Hani and Yi Autonomous Prefecture 661000,Yunnan,China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2024年第1期166-173,194,共9页
Fine Chemicals
基金
国家自然科学基金项目(42067056,21866017)。
