Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/44627
DC FieldValueLanguage
dc.contributor.authorWang, S.L.en_US
dc.contributor.author王尚禮zh_TW
dc.contributor.authorHseu, R.J.en_US
dc.contributor.authorChang, R.R.en_US
dc.contributor.authorChiang, P.N.en_US
dc.contributor.authorChen, J.H.en_US
dc.contributor.authorTzou, Y.M.en_US
dc.contributor.author鄒裕民zh_TW
dc.contributor.author陳仁炫zh_TW
dc.date2006zh_TW
dc.date.accessioned2014-06-06T08:12:55Z-
dc.date.available2014-06-06T08:12:55Z-
dc.identifier.issn0927-7757zh_TW
dc.identifier.urihttp://hdl.handle.net/11455/44627-
dc.description.abstractLi/Al layered double hydroxide (Li/Al LDH), known as anionic clay, comprises positive charges, which are counter-balanced by interlayer anions. The material is capable of adsorbing anions through ion-exchange reaction. This property of LDH leads to its potential application in scavenging anionic contaminants, such as Cr(VI) in the waste streams. In this study, the adsorption of Cr(VI) by Li/Al LDH was investigated at 10 and 30 degrees C. The results showed that Cr(VI) adsorption was relatively rapid; however, a portion of adsorbed Cr(VI) was released over the reaction time and the releasing rate was dependent on reaction temperature. Particularly at 30 degrees C as high as 80.1% of adsorbed Cr(VI) was released after 24 h reaction. The release of adsorbed Cr(VI) is due to the deintercalation of Li+ from Li/Al LDH structures in aqueous Solution and gibbsite, which wits used as the precursor to synthesize Li/Al LDH, was the product of the deintercalation reaction. The Li deintercalation reaction of Li/Al LDH and its dependence on temperature may be utilized to develop a method of treating Cr(VI)-containing wastes and recovering Cr(VI). That is, Li/Al LDH can be used as an adsorbent to remove Cr(VI) in wastewater. Then the Cr(VI)-bearing LDH particles are collected and re-suspended in hot water to enhance Li deintercalation and Cr(VI) desorption. Consequently Cr(VI) can be recovered from the solution and the solid product, i.e., gibbsite, can be recycled for further uses. (c) 2005 Elsevier B.V. All rights reserved.en_US
dc.language.isoen_USzh_TW
dc.relationColloids and Surfaces a-Physicochemical and Engineering Aspectsen_US
dc.relation.ispartofseriesColloids and Surfaces a-Physicochemical and Engineering Aspects, Volume 277, Issue 1-3, Page(s) 8-14.en_US
dc.relation.urihttp://dx.doi.org/10.1016/j.colsurfa.2005.10.073en_US
dc.subjectLi/Al LDHen_US
dc.subjectCr(VI)en_US
dc.subjectadsorptionen_US
dc.subjectdeintercalationen_US
dc.subjectthermal desorptionen_US
dc.subjectanion-exchange intercalationen_US
dc.subjectx-ray-diffractionen_US
dc.subjectchemistryen_US
dc.subjecthydrotalcitesen_US
dc.subjectchromium(vi)en_US
dc.subjectreductionen_US
dc.subjectremovalen_US
dc.subjectionsen_US
dc.subjectclayen_US
dc.subjectsalten_US
dc.titleAdsorption and thermal desorption of Cr(VI) on Li/Al layered double hydroxideen_US
dc.typeJournal Articlezh_TW
dc.identifier.doi10.1016/j.colsurfa.2005.10.073zh_TW
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