HA@Fe3O4修饰阳极增强微生物燃料电池降解类固醇雌激素
HA@Fe3O4 modified anode to enhance degradation of estrogen in microbial fuel cells
王昌鲁 1余厂 2黄斌 1来超超 1郭子维 1潘学军1
作者信息
- 1. 昆明理工大学 环境科学与工程学院,云南 昆明 650500
- 2. 昆明理工大学 环境科学与工程学院,云南 昆明 650500;河口瑶族自治县发展和改革局,云南红河哈尼族彝族自治州 661000
- 折叠
摘要
利用腐植酸(HA)与具有较强电容性的纳米 Fe3O4 颗粒形成的金属化合物(HA@Fe3O4)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@Fe3O4 的MFC相比,存在HA@Fe3O4 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@Fe3O4 的存在显著增加了阳极板的电容.HA@Fe3O4 修饰阳极后MFC最大功率密度可达 537.37 mW/m2.HA@Fe3O4 修饰的阳极可显著提高MFC对EE2 的去除率,EE2 在低浓度下(≤5.0 μmol/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(5.0～10.0 μmol/L)时会抑制微生物的活性并降低MFC产电效率.
Abstract
Microbial fuel cell(MFC)anode was modified with a metal compound(HA@Fe3O4)formed by humic acid(HA)and nano-Fe3O4 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@Fe3O4 were reduced by 79.58%and 89.60%,respectively,compared with those of the MFC without HA@Fe3O4.Cyclic voltammetry results indicated that the presence of HA@Fe3O4 significantly increased the capacitance of the anode plate.The maximum power density of the MFC after HA@Fe3O4 modification reached up to 537.37 mW/m2.HA@Fe3O4 modified anode significantly improved the removal rate of EE2 by MFC.EE2 could mediate electron transfer at low concentrations(≤5.0 μmol/L)and improve the electrical performance of MFC,thus promoting the ability of MFC to remove EE2.However,high concentration(5.0～10.0 μmol/L)could inhibit microbial activity and reduce the electrical generation efficiency of MFC.
关键词
腐植酸/燃料电池/17α-乙炔基雌二醇/HA@Fe3O4/生物膜/厌氧/水处理技术Key words
humic acid/fuel cells/17α-ethynylestradiol/HA@Fe3O4/biofilm/anaerobism/water treatment technology引用本文复制引用
基金项目
国家自然科学基金(42067056)
国家自然科学基金(21866017)
出版年
2024
NETL
NSTL
万方数据