Fe/HA修饰阳极对MFC产电和脱氮性能的影响

为了选取具有较高氧化还原活性的铁腐殖酸复合物（Fe/HA）作为阳极材料，开展Fe/HA修饰阳极对MFC产电和硝酸盐降解性能影响的研究。通过电沉积法制备Fe/HA修饰阳极，利用扫描电子显微镜（SEM）和傅里叶红外光谱（FTIR）对Fe/HA修饰阳极的表面形貌特征和活性官能团进行表征；同时采用循环伏安曲线（CV）、塔菲尔曲线（Tafel）和交流阻抗曲线（EIS）对Fe/HA修饰阳极的电化学性能进行测量；并以硝酸盐废水为模拟废水，考察Fe/HA修饰阳极对MFC性能的影响。结果表明：Fe/HA修饰阳极表面具有松散的簇团状结构和氧化还原活性官能团；JP2]同时，与空白阳极相比，Fe/HA修饰阳极电荷转移量增加了75.82%，交换电流密度增加了14.95%，电荷转移阻抗降低了17.60%；Fe/HA修饰阳极MFC的最大平均输出电压和脱氮效率较空白阳极MFC分别增加了16.52%和6.47%。通过Fe/HA对MFC阳极的修饰，可有效增加阳极表面氧化还原活性官能团的数量和微生物附着的面积，从而提高电子传递效率，实现对MFC产电性能和脱氮效率的提高，本研究可为金属与腐殖酸复合物阳极材料的开发及其在MFC废水处理领域的应用提供理论依据。

Effect of Fe/HA modified anode on MFC power generation and nitrogen removal performance

Iron humic acid complex (Fe/HA) was selected as the anode material for its good redox activity,and the effect of Fe/HA modified anode on the power generation and nitrate degradation performance of MFC was investigated.Fe/HA modified anode was prepared by electrodeposition method.The surface morphology and active functional groups of the prepared anode were measured by scanning electron microscopy and flourier transform infrared spectroscopy;cyclic voltammetry curve,tafel curve,and electrochemical impedance spectroscopy curve were used to investigate the electrochemical performance of Fe/HA modified anode;and the performance of MFC was investigated with the synthetic nitrate wastewater.Results showed that Fe/HA modified anode has a loose cluster structure and redox-active functional groups;compared with the control anode,the charge transfer amount,exchange current density and charge transfer impedance of the Fe/HA modified anode improved by 75.82%,14.95% and 17.60%;compared with the control anode MFC,the maximum average output voltage and denitrification efficiency of Fe/HA modified anode MFC were increased by 16.52% and 6.47%.The Fe/HA modified anode has effectively increased the number of redox-active functional groups and the area of microbial attachment on the anode surface,thereby improving the electron transfer efficiency and further achieving the enhancement of the MFC power generation and nitrogen removal efficiency.This work provides theoretical basis for the development of metal humic acid complex anodes and their applications in MFC wastewater treatment field.