Understanding the role of Fe(III)/Fe(II) couple in mediating reductive transformation of 2-nitrophenol in microbial fuel cells
文献类型: 外文期刊
作者: Feng, Chunhua 2 ; Li, Fangbai 1 ; Sun, Kewen 4 ; Liu, Yongye 3 ; Liu, Liang 1 ; Yue, Xianjun 3 ; Tong, Hui 1 ;
作者机构: 1.Guangdong Inst Ecoenvironm & Soil Sci, Guangdong Key Lab Agr Environm Pollut Integrated, Guangzhou 510650, Guangdong, Peoples R China
2.S China Univ Technol, Sch Environm Sci & Engn, Higher Educ Mega Ctr, Guangzhou 51006, Guangdong, Peoples R China
3.S China Univ Technol, Sch Chem & Chem Engn, Minist Educ, Key Lab Enhanced Heat Transfer & Energy Conservat, Guangzhou 510640, Guangdong, Peoples R China
4.Wenzhou Med Coll, Inst Hlth & Environm Ecol
关键词: 2-Nitrophenol;Electrochemical mediator;Ferrous iron;Microbial fuel cell;Reductive transformation
期刊名称:BIORESOURCE TECHNOLOGY ( 2020影响因子:9.642; 五年影响因子:9.237 )
收录情况: SCI
摘要: 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 0.12h~(-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 1.0Wm~(-3), which is the highest value among those obtained with other iron species for the similar MFC system.
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