Removal of phosphate from water by a Fe-Mn binary oxide adsorbent

CORC > 烟台海岸带研究所 > 中国科学院烟台海岸带研究所 > 中科院海岸带环境过程与生态修复重点实验室 > 污染过程与控制实验室

	Removal of phosphate from water by a Fe-Mn binary oxide adsorbent
	Zhang, Gaosheng1,2 ; Liu, Huijuan 1; Liu, Ruiping 1; Qu, Jiuhui 1
刊名	JOURNAL OF COLLOID AND INTERFACE SCIENCE
	2009-07-15
卷号	335 期号:2 页码:168-174
关键词	Fe-mn Binary Oxide Phosphate Removal Mechanism Specific Adsorption
ISSN号	0021-9797
通讯作者	Qu, JH, Chinese Acad Sci, Ecoenvironm Sci Res Ctr, State Key Lab Environm Aquat Chem, POB 2871, Beijing 100085, Peoples R China
产权排序	Chinese Acad Sci, Ecoenvironm Sci Res Ctr, State Key Lab Environm Aquat Chem;Chinese Acad Sci, Yantai Inst Coastal Zone Res Sustainable Dev
文献子类	Article
英文摘要	Phosphate removal is important in the control of eutrophication of water bodies and adsorption is one of the promising approaches for this purpose. A Fe-Mn binary oxide adsorbent with a Fe/Mn molar ratio of 6:1 for phosphate removal was synthesized by a simultaneous oxidation and coprecipitation process. Laboratory experiments were carried out to investigate adsorption kinetics and equilibrium, in batch mode. The effects of different experimental parameters, namely contact time, initial phosphate concentration, solution pH, and ionic strength on the phosphate adsorption were investigated. The adsorption data were analyzed by both Freundlich and Langmuir isotherm models and the data were well fit by the Freundlich isotherm model. Kinetic data correlated well with the pseudo-second-order kinetic model, suggesting that the adsorption process might be chemical sorption. The maximal adsorption capacity was 36 mg/g at pH 5.6. The phosphate adsorption was highly pH dependent. The effects of anions such as Cl(-), SO(4)(2-), and CO(3)(2-) on phosphate removal were also investigated. The results suggest that the presence of these ions had no significant effect on phosphate removal. The phosphate removal was mainly achieved by the replacement of surface hydroxyl groups by the phosphate species and formation of inner-sphere surface complexes at the water/oxide interface. In addition, the adsorbed phosphate ions can be effectively desorbed by dilute NaOH solutions. This adsorbent, with large adsorption capacity and high selectivity, is therefore a very promising adsorbent for the removal of phosphate ions from aqueous solutions. (C) 2009 Elsevier Inc. All rights reserved.
学科主题	Chemistry, Physical
URL标识	查看原文
WOS关键词	WASTE-WATER ; PHOSPHORUS REMOVAL ; FLY-ASH ; RED MUD ; ADSORPTION ; IRON ; SOILS ; MECHANISMS ; GOETHITE ; SORBENTS
WOS研究方向	Chemistry
语种	英语
WOS记录号	WOS:000266644000002
资助机构	Funds for Creative Research Groups of China [50621804]; National Natural Science Foundation of China [20577063]
公开日期	2011-07-05
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/3545]
专题	烟台海岸带研究所_污染过程与控制实验室
作者单位	1.Chinese Acad Sci, Ecoenvironm Sci Res Ctr, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China 2.Chinese Acad Sci, Yantai Inst Coastal Zone Res Sustainable Dev, Yantai 264003, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Gaosheng,Liu, Huijuan,Liu, Ruiping,et al. Removal of phosphate from water by a Fe-Mn binary oxide adsorbent[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2009,335(2):168-174.
APA	Zhang, Gaosheng,Liu, Huijuan,Liu, Ruiping,&Qu, Jiuhui.(2009).Removal of phosphate from water by a Fe-Mn binary oxide adsorbent.JOURNAL OF COLLOID AND INTERFACE SCIENCE,335(2),168-174.
MLA	Zhang, Gaosheng,et al."Removal of phosphate from water by a Fe-Mn binary oxide adsorbent".JOURNAL OF COLLOID AND INTERFACE SCIENCE 335.2(2009):168-174.