Mn(VII)-Fe(II) pre-treatment for Microcystis aeruginosa removal by Al coagulation: Simultaneous enhanced cyanobacterium removal and residual coagulant control

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境水质学国家重点实验室

	Mn(VII)-Fe(II) pre-treatment for Microcystis aeruginosa removal by Al coagulation: Simultaneous enhanced cyanobacterium removal and residual coagulant control
	Ma, Min ; Liu, Ruiping ; Liu, Huijuan ; Qu, Jiuhui
刊名	WATER RESEARCH
	2014
卷号	65 期号:1 页码:73-84
关键词	Microcystis aeruginosa Mn(VII)-Fe(II)-Al process Fe(III) formed in situ Dual-coagulant Residual coagulant
ISSN号	0043-1354
中文摘要	A novel Mn(VII)-Fe(II) pre-treatment was proposed to simultaneously enhance the removal of Microcystis aeruginosa by aluminum chloride (AlCl3) coagulation and enabled lowering the dose of Al as effective coagulation can be achieved only by Al, however, at higher doses. In this process, permanganate [Mn(VII)] and ferrous sulfate [Fe(II)] were dosed sequentially prior to Al. The application of Fe(II) not only avoids the extensive oxidation of M. aeruginosa by Mn(VII) but also introduces Fe(III) formed in situ into the system. Results show that, at Al doses of 83.3-108.3 mu M, Mn(VII)-Fe(II) pretreatment (Mn(VII) dose: 8.3-16.7 mu M; Fe(II) dose: 39.5 mu M) is capable of enhancing M. aeruginosa removal by 73.4-81.4%. In contrast, only 0 -65.4% and 2.7-8.2% increase in M. aeruginosa removal is achieved by Mn(VII) and Fe(II) pre-treatment, respectively. The ESI-MS spectrum shows that the freshly formed Fe(III) hydrolyzes much more slowly than pre-formed Fe(III) does, and this effect results in its higher efficiency towards the removal of M. aeruginosa. Moreover, in the co-existing system, Fe tends to hydrolyze preferentially and the presence of Fe salts improves the precipitation of Al and vice versa. Thus, the use of Fe and Al as dual-coagulants is practically valuable to control the residual level of coagulant(s) besides its improvement on the removal of M. aeruginosa. (C) 2014 Elsevier Ltd. All rights reserved.
WOS记录号	WOS:000342881300006
公开日期	2015-03-26
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/9570]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Ma, Min,Liu, Ruiping,Liu, Huijuan,et al. Mn(VII)-Fe(II) pre-treatment for Microcystis aeruginosa removal by Al coagulation: Simultaneous enhanced cyanobacterium removal and residual coagulant control[J]. WATER RESEARCH,2014,65(1):73-84.
APA	Ma, Min,Liu, Ruiping,Liu, Huijuan,&Qu, Jiuhui.(2014).Mn(VII)-Fe(II) pre-treatment for Microcystis aeruginosa removal by Al coagulation: Simultaneous enhanced cyanobacterium removal and residual coagulant control.WATER RESEARCH,65(1),73-84.
MLA	Ma, Min,et al."Mn(VII)-Fe(II) pre-treatment for Microcystis aeruginosa removal by Al coagulation: Simultaneous enhanced cyanobacterium removal and residual coagulant control".WATER RESEARCH 65.1(2014):73-84.