Removal of phosphate from water by a Fe-Mn binary oxide adsorbent
Zhang, Gaosheng1,2; Liu, Huijuan1; Liu, Ruiping1; Qu, Jiuhui1
2009-07-15
Source PublicationJOURNAL OF COLLOID AND INTERFACE SCIENCE
ISSN0021-9797
Volume335Issue:2Pages:168-174
Contribution RankChinese Acad Sci, Ecoenvironm Sci Res Ctr, State Key Lab Environm Aquat Chem;Chinese Acad Sci, Yantai Inst Coastal Zone Res Sustainable Dev
AbstractPhosphate 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.
Corresponding AuthorQu, JH, Chinese Acad Sci, Ecoenvironm Sci Res Ctr, State Key Lab Environm Aquat Chem, POB 2871, Beijing 100085, Peoples R China
KeywordFe-mn Binary Oxide Phosphate Removal Mechanism Specific Adsorption
Department污染过程与控制实验室
Subject AreaChemistry, Physical
Funding OrganizationFunds for Creative Research Groups of China [50621804]; National Natural Science Foundation of China [20577063]
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Indexed BySCI
WOS KeywordWASTE-WATER ; PHOSPHORUS REMOVAL ; FLY-ASH ; RED MUD ; ADSORPTION ; IRON ; SOILS ; MECHANISMS ; GOETHITE ; SORBENTS
SubtypeArticle
Language英语
WOS Research AreaChemistry
WOS IDWOS:000266644000002
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Document Type期刊论文
Identifierhttp://ir.yic.ac.cn/handle/133337/3544
Collection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
Affiliation1.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
First Author AffilicationYantai Institute of Coastal Zone Research, Chinese Academy of Sciences
Recommended Citation
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.
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