A study of phosphate adsorption by different temperature treated hydrous cerium oxides

被引：34

作者：

Guo Huichao ^{[2
]}

Li Wenjun ^{[1
]}

Wang Huanying ^{[2
]}

Zhang Jinghua ^{[3
]}

Liu Yang ^{[3
]}

Zhou Yue ^{[3
]}

机构：

[1] Univ Sci & Technol Beijing, Sch Appl Sci, Beijing 100083, Peoples R China

[2] Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing 100083, Peoples R China

[3] Beijing Ctr Phys & Chem Anal, Beijing 100089, Peoples R China

来源：

RARE METALS | 2011年 / 30卷 / 01期

基金：

中国国家自然科学基金;

关键词：

phosphates; adsorption; cerium compounds; hydroxyl group; ion exchange; RARE-EARTH-OXIDES; REMOVAL; SPECTROSCOPY; ADSORBENT; GOETHITE; FLUORIDE;

D O I：

10.1007/s12598-011-0197-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An alkaline precipitation method was introduced to produce hydrous cerium oxides. The prepared powder was characterized by Brunauer-Emmett-Teller (BET) nitrogen adsorption-desorption, X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectrometry, and thermal gravimetry (TG) approaches. The adsorbent has a chemical formula of CeO2 center dot nH(2)O (n < 2) and a cubic fluorite-type structure after high temperature treatment. Adsorption capacity of different temperature treated hydrous cerium oxides does not directly correlate with BET specific surface area. Phosphate adsorption isotherms follow the Langmuir equation below the treatment temperature of 800 degrees C. Phosphate adsorption causes no change on the structure of a hydrous cerium oxides, and no signs of CePO4 precipitates are found. The ion-exchanging structure of hydrous cerium oxide plays a fundamental role in phosphate adsorption. The structure is highly temperature resistant and forms adsorption sites which adsorb both water and some anions. Complete loss of adsorption ability cannot be achieved unless the treatment temperature is higher than 1200 degrees C. Mechanism study shows that the adsorption of phosphates is mainly an anion-exchange process.

引用

页码：58 / 62

页数：5

共 20 条

[11] Adsorption of selected ions on hydrous cerium oxide [J].

Nilchi, A. ;

Yaftian, M. ;

Aboulhasanlo, G. ;

Rasouli Garmarodi, S. .

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, 2009, 279 (01) :65-74

[12] Effect of oxygen release on the sintering of fine CeO2 powder at low temperature [J].

Ozawa, M .

SCRIPTA MATERIALIA, 2004, 50 (01) :61-64

[13] MECHANISM OF PHOSPHATE FIXATION BY IRON OXIDES [J].

PARFITT, RL ;

ATKINSON, RJ ;

SMART, RSC .

SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, 1975, 39 (05) :837-841

[14] Adsorption of fluoride onto mixed rare earth oxides [J].

Raichur, AM ;

Basu, MJ .

SEPARATION AND PURIFICATION TECHNOLOGY, 2001, 24 (1-2) :121-127

[15] INFRARED SPECTROSCOPY OF FERRIHYDRITE - EVIDENCE FOR THE PRESENCE OF STRUCTURAL HYDROXYL-GROUPS [J].

RUSSELL, JD .

CLAY MINERALS, 1979, 14 (02) :109-114

[16] SURFACE-STRUCTURES OF GIBBSITE GOETHITE AND PHOSPHATED GOETHITE [J].

RUSSELL, JD ;

PARFITT, RL ;

FRASER, AR ;

FARMER, VC .

NATURE, 1974, 248 (5445) :220-221

[17] Nanostructured ceria: a comparative study from X-ray diffraction, Raman spectroscopy and BET specific surface measurements [J].

Saitzek, S. ;

Blach, J. -F. ;

Villain, S. ;

Gavarri, J. -R. .

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 2008, 205 (07) :1534-1539

[18] Hydrothermal synthesis and characterization of rare earth doped ceria nanoparticles [J].

Tok, A. I. Y. ;

Du, S. W. ;

Boey, F. Y. C. ;

Chong, W. K. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2007, 466 (1-2) :223-229

[19] Fluoride removal performance of a novel Fe-Al-Ce trimetal oxide adsorbent [J].

Wu, Xiaoinei ;

Zhang, Yu ;

Dou, Xiaomin ;

Yang, Min .

CHEMOSPHERE, 2007, 69 (11) :1758-1764

[20] Arsenic(V) removal with a Ce(IV)-doped iron oxide adsorbent [J].

Zhang, Y ;

Yang, M ;

Huang, X .

CHEMOSPHERE, 2003, 51 (09) :945-952

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