Anodic Fenton process assisted by a microbial fuel cell for enhanced degradation of organic pollutants.
The electro-Fenton process is efficient for degradation of organic pollutants, but it suffers from the high operating costs due to the need of power investment. Here, a new anodic Fenton system is developed for energy-saving and efficient treatment of organic pollutants by incorporating microbial fuel cell (MFC) into an anodic Fenton process. This system is composed of an anodic Fenton reactor and a two-chamber air-cathode MFC. The power generated from a two-chamber MFC is used to drive the anodic Fenton process for Acid Orange 7 (AO7) degradation through accelerating in situ generation of Fe(2+) from sacrificial iron. The kinetic results show that the MFC-assisted anodic Fenton process system had a significantly higher pseudo-first-order rate constant than those for the chemical Fenton methods. The electrochemical analysis reveals that AO7 did not hinder the corrosion of iron. The anodic Fenton process was influenced by the MFC performance. It was also found that increasing dissolved oxygen in the cathode improved the MFC power density, which in turn enhanced the AO7 degradation rate. These clearly demonstrate that the anodic Fenton process could be integrated with MFC to develop a self-sustained system for cost-effective and energy-saving electrochemical wastewater treatment.
Department of Chemistry, University of Science & Technology of China, Hefei 230026, China.
Xian-Wei
XW
Liu
Xue-Fei
XF
Sun
Dao-Bo
DB
Li
Wen-Wei
WW
Li
Yu-Xi
YX
Huang
Guo-Ping
GP
Sheng
Han-Qing
HQ
Yu
D061249:Batch Cell Culture Techniques; D001673:Biodegradation, Environmental; D001674:Bioelectric Energy Sources; D003343:Corrosion; D004566:Electrodes; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D007700:Kinetics; D009930:Organic Chemicals / Q000737:chemistry* / Q000302:isolation & purification*; D010100:Oxygen / Q000032:analysis; D012995:Solubility; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification*; D018508:Water Purification / Q000295:instrumentation* / Q000379:methods*
C045076:Fenton's reagent; D009930:Organic Chemicals; D014874:Water Pollutants, Chemical; D006861:Hydrogen Peroxide; D007501:Iron; D010100:Oxygen