| STUDY OF ADSORPTION OF RARE EARTH ELEMENTSBY FERRIC OXIDE GEL |
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| 引用本文： | Zhang Ping (Department of Mineral Engineering,Central South University of Technology,Changsha 410083,China)Chi Ruan, Lu Shouci (Institute of Nuclear Energy Technology,Tsinghua University,Beijing 102201,China)(Beijing University of Science and Technology. STUDY OF ADSORPTION OF RARE EARTH ELEMENTSBY FERRIC OXIDE GEL[J]. 中南工业大学学报(英文版), 1997, 4(2): 96-99. DOI: 10.1007/s11771-997-0006-3 |
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| 作者姓名： | Zhang Ping (Department of Mineral Engineering Central South University of Technology Changsha 410083 China)Chi Ruan Lu Shouci (Institute of Nuclear Energy Technology Tsinghua University Beijing 102201 China)(Beijing University of Science and Technology |
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| 作者单位： | Zhang Ping (Department of Mineral Engineering，Central South University of Technology，Changsha 410083，China)Chi Ruan; Lu Shouci (Institute of Nuclear Energy Technology，Tsinghua University，Beijing 102201，China)(Beijing University of Science and Technology |
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| 摘 要： | Thereexistthreeformsofrareearthelements(REE)intheknownnaturalores:mineralcrystallineform,isomorphousreplacementformandexchangeableionicadsorptionform.Resently,however,anewkindofsecondaryoreofrareearthelementswidelydistributedintheoxidationzoneofthelargerbast--naesitedepositshasbeendiscoveredintheSouthwestofChinaandVietnam.Theneworelookslikeblackearthyefflorescence,andmainlyconsistsofamorphousFe--MnoxideandSt--Aloxide.Theformeraccountsfor74.14%(volumerate)andthelatter25.86%(volumerate).Ther…
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Study of adsorption of rare earth elements by ferric oxide gel |
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| Zhang Ping , Chi Ruan and Lu Shouci. Study of adsorption of rare earth elements by ferric oxide gel[J]. Journal of Central South University of Technology, 1997, 4(2): 96-99. DOI: 10.1007/s11771-997-0006-3 |
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| Authors: | Zhang Ping Chi Ruan Lu Shouci |
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| Affiliation: | (1) Department of Mineral Engineering, Central South University of Technology, 410083 Changsha, China;(2) Institute of Nuclear Energy Technology, Tsinghua University, 102201 Beijing, China |
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| Abstract: | A new secondary ore of rare earth was discovered in the Southwest of China. It is a kind of product of the weathered mineral. The rare earth elements (REE) in it exist probably as ionic characteristic adsorption state in manganesian and ferric oxide colloid mineral, and one bearer of REE is amorphous ferric oxide gel. It is neessary to study the binding state of rare earth elements on manganesian and ferric oxide in order to utilize comprehensively the rare earth resources and avoid latent influence on the environment resulting from the fact that highcontent rare earth elements are carried into soil by the mineral efflorescence. A simulating adsorption test of rare earth ions in weak acid media is carried out with ferric oxide gel prepared by sol-gel method. The experimental results show that the characteristics of adsorption isotherm correspond well with the Flory-Huggins equation, but deviated from the Langmuir equation. The standard molar adsorption Gibbs function, standard molar adsorption entropy and standard molar adsorption enthaply are calculated. The measurements of the point of zero charge and isoelectric point show occurrence of the characteristic adsorption. It has been proved that the OH group on the skeleton of ferric oxide gel is the innate cause of the characteristic adsorption. |
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| Keywords: | ferric oxide gel rare earth elements characteristic adsorption |
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