Phosphate removal from water using freshly formed Fe-Mn binary oxide: Adsorption behaviors and mechanisms

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

	Phosphate removal from water using freshly formed Fe-Mn binary oxide: Adsorption behaviors and mechanisms
	Lu, Jianbo ; Liu, Huijuan ; Zhao, Xu ; Jefferson, William ; Cheng, Fang ; Qu, Jiuhui
刊名	COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
	2014
卷号	455 期号:1 页码:11-18
关键词	Ferric oxide Manganese oxide Binary oxide Phosphate Adsorption
ISSN号	0927-7757
中文摘要	Freshly formed metal oxide suspensions usually have high reactivity and are easy to achieve in-situ preparation and dosing in water treatment. In this study, a freshly formed Fe-Mn binary oxide (FMBO) suspension was prepared for phosphate removal using simultaneous oxidation and coprecipitation method. FMBO was characterized by SEM, TEM, XRD and zeta potential and compared with the mixture of ferric oxide and manganese oxides (FMMO), hydrous ferric oxide (HFO) and hydrous manganese oxide (HMO). Results indicated that ferric oxide was relatively enriched on the surface of nanostructured binary oxide, resulting in its pH(ZPC) and XRD pattern close to HFO. At pH 3-10, phosphate removals followed trend: FMBO > FMMO > HFO > HMO. The pseudo-second-order kinetics model provided a better fit for phosphate adsorption onto FMBO, indicating that chemisorption may play a dominant role. The maximum adsorption capacity estimated from the Langmuir equation was 0.223 mol-P/mol-Fe at pH 5.0. The competition effects of coexisting substances such as sulfate, bicarbonate, silicate and DOC on phosphate adsorption using FMBO were not significant. Phosphate adsorption onto FMBO could be attributed to electrostatic interaction and replacement of surface hydroxyl groups via formation of monodentate and bidentate complexes. (C) 2014 Elsevier B.V. All rights reserved.
WOS记录号	WOS:000337878400002
公开日期	2015-03-26
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/9580]
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	Lu, Jianbo,Liu, Huijuan,Zhao, Xu,et al. Phosphate removal from water using freshly formed Fe-Mn binary oxide: Adsorption behaviors and mechanisms[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2014,455(1):11-18.
APA	Lu, Jianbo,Liu, Huijuan,Zhao, Xu,Jefferson, William,Cheng, Fang,&Qu, Jiuhui.(2014).Phosphate removal from water using freshly formed Fe-Mn binary oxide: Adsorption behaviors and mechanisms.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,455(1),11-18.
MLA	Lu, Jianbo,et al."Phosphate removal from water using freshly formed Fe-Mn binary oxide: Adsorption behaviors and mechanisms".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 455.1(2014):11-18.