School of Environmental Science and Engineering, South China University of Technology, Higher Education Mega Center, Guangzhou 51006, PR China.
Bioresour Technol. 2011 Jan;102(2):1131-6. doi: 10.1016/j.biortech.2010.09.005. Epub 2010 Sep 7.
The Fe(III)/Fe(II) couple can play a significant role in the abiotic reduction of 2-nitrophenol (2-NP) at the cathode chamber of a microbial fuel cell (MFC). Experimental results demonstrate that Fe(II) addition to the cathode chamber contributes to a significant increase in the reaction rate of 2-NP removal and the power performance of MFC. Observed pseudo first-order rate constants and power densities are heavily dependent on the identity of the Fe(II)-complexing ligands. The Fe(II) complex coordinated with citrate results in the highest rate constant up to 0.12 h(-1) as compared to other organically complexed iron species including Fe(II)-EDTA, Fe(II)-acetate and Fe(II)-oxalate, and iron species uncomplexed with any organic ligands. In addition, the presence of Fe(II)-citrate species leads to a maximum volumetric power density of 1.0 W m(-3), which is the highest value among those obtained with other iron species for the similar MFC system.
Fe(III)/Fe(II) 电对可在微生物燃料电池 (MFC) 的阴极室内对 2-硝基苯酚 (2-NP) 的非生物还原起到重要作用。实验结果表明，向阴极室内添加 Fe(II) 可显著提高 2-NP 去除的反应速率和 MFC 的功率性能。观察到的拟一级速率常数和功率密度严重依赖于 Fe(II)-络合剂的特性。与其他有机络合铁物种（包括 Fe(II)-EDTA、Fe(II)-醋酸盐和 Fe(II)-草酸盐以及未与任何有机配体络合的铁物种）相比，与柠檬酸盐配位的 Fe(II) 复合物可达到最高的速率常数，可达 0.12 h(-1)。此外，Fe(II)-柠檬酸盐物种的存在可使体积功率密度达到 1.0 W m(-3)，这是在类似的 MFC 系统中使用其他铁物种获得的最高值。
