Enhanced removal of Microcystis aeruginosa in BDD-CF electrochemical   system by simple addition of Fe2+

doi:10.1016/j.cej.2017.05.067

CORC > 北京大学 > 环境科学与工程学院

	Enhanced removal of Microcystis aeruginosa in BDD-CF electrochemical system by simple addition of Fe2+
	Long, Yujiao ; Li, Hongna ; Xing, Xuan ; Ni, Jinren
刊名	CHEMICAL ENGINEERING JOURNAL
	2017
关键词	Blue algae Boron-doped diamond Mechanism Electrochemical Heterogeneous electro-Fenton BORON-DOPED DIAMOND ADVANCED OXIDATION PROCESSES ELECTRO-FENTON PROCESS WASTE-WATER TREATMENT PHOTOELECTRO-FENTON ANODIC-OXIDATION HYDROGEN-PEROXIDE GRAPHITE-FELT DEGRADATION MINERALIZATION
DOI	10.1016/j.cej.2017.05.067
英文摘要	This study presented a significant enhanced removal of Microcystis aeruginosa by simple addition of Fe2+ at circumneutral pH in the electrochemical system with boron-doped diamond (BDD) anode and carbon felt (CF) cathode. Results showed that over 99.9% of the M. aeruginosa cells were removed in 60 min when 0.2 mM Fe2+ was added to the system. The pseudo-first order rate constant for BDD-CF-Fe2+ system was almost 15 times higher than that (0.005 min(-1)) for BDD-CF system. The excellent performance of the BDD-CF-Fe2+ system over the BDD-CF system was observed over a wide range of pH from 3 to 9. Based on the evolution of Fe2+/Fe3+, pH, H2O2 and OH, mechanism of enhanced removal of M. aeruginosa was revealed in the BDD-CF-Fe2+ system. H2O2 was electrochemically generated through reduction of dissolved oxygen on the surface of the CF cathode, and the added Fe+ was rapidly adsorbed and precipitated also on the CF cathode. Comparisons of BDD-CF-Fe2+, BDD-CF-Fe3+ and BDD-CF-Fe2+/Fe3+ systems proved that the electrochemical reduction of Fe(III) to Fe(II) could guarantee the sustainable cycle between Fe(II) and Fe(III). Through heterogeneous electro-Fenton reactions, much higher amount of OH would be continuously generated compared with the BDD-CF system. Thereby, the lipid peroxidation on the cell membrane of M. aeruginosa was intensified through the addition of Fe2+. Moreover, the degradation of intracellular microcystin was remarkably accelerated, and the extracellular microcystin was controlled more safely due to Fe2+ addition. This study provided an alternative method to enhance the electrochemical mitigation of cyanobacteria-polluted waters. (C) 2017 Elsevier B.V. All rights reserved.; National Natural Science Foundation of China [51539001, 51409285]; SCI(E); ARTICLE; 360-368; 325
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/470716]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Long, Yujiao,Li, Hongna,Xing, Xuan,et al. Enhanced removal of Microcystis aeruginosa in BDD-CF electrochemical system by simple addition of Fe2+[J]. CHEMICAL ENGINEERING JOURNAL,2017.
APA	Long, Yujiao,Li, Hongna,Xing, Xuan,&Ni, Jinren.(2017).Enhanced removal of Microcystis aeruginosa in BDD-CF electrochemical system by simple addition of Fe2+.CHEMICAL ENGINEERING JOURNAL.
MLA	Long, Yujiao,et al."Enhanced removal of Microcystis aeruginosa in BDD-CF electrochemical system by simple addition of Fe2+".CHEMICAL ENGINEERING JOURNAL (2017).