Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/44631
DC FieldValueLanguage
dc.contributor.authorHsu, L.C.en_US
dc.contributor.author王尚禮zh_TW
dc.contributor.authorWang, S.L.en_US
dc.contributor.authorTzou, Y.M.en_US
dc.contributor.authorLin, C.F.en_US
dc.contributor.authorChen, J.H.en_US
dc.contributor.author鄒裕民zh_TW
dc.contributor.author陳仁炫zh_TW
dc.date2007zh_TW
dc.date.accessioned2014-06-06T08:12:56Z-
dc.date.available2014-06-06T08:12:56Z-
dc.identifier.issn0304-3894zh_TW
dc.identifier.urihttp://hdl.handle.net/11455/44631-
dc.description.abstractHexavalent Cr has been identified as one of the toxic metals commonly present in industrial effluents. Among the treatment techniques developed for removing Cr(VI) from waste waters, sorption is most commonly applied, due to its simplicity and efficiency. However, few adsorbents can be recycled and reused cost-effectively. In this study, the removal and recovery of Cr(VI) from water using Li/Al LDH was investigated. The removal of Cr(VI) by Li/Al LDH was evaluated in a batch mode. The results demonstrated that Cr(VI) adsorption onto Li/Al LDH occurs by replacing the Cl(-) that originally exists in the interlayer of the adsorbent. The degree of Cr(VI) adsorption observed for Li/Al LDH was relatively high and the process occurred rapidly; however, a portion of adsorbed Cr(VI) was gradually desorbed, due to the Li de-intercalation of Li/Al LDH. Lithium de-intercalation from LVAI LDH with interlayer Cl(-) and interlayer Cr(VI) follows the first order kinetics and has the activation energies of 76.6 and 41.5 kJ mol(-1), respectively. The properties of thermal unstablility and the high adsorption capacity of Li/Al LDH may lead to the development of an innovative technique for the removal of Cr(VI) from Cr(VI)-containing wastewater. That is, LVAI LDH may be used as an effective adsorbent for the adsorption of Cr(VI) in an ambient environment. Following the adsorptive process, the adsorbed Cr(VI) may be released, using heated water to treat the Cr(VI)-containing Li/Al LDH particles. Through this hydrothermal treatment of the used adsorbent, Cr(VI) can be recovered and the solid product (gibbsite) can be recycled for further use. (c) 2006 Elsevier B.V. All rights reserved.en_US
dc.language.isoen_USzh_TW
dc.relationJournal of Hazardous Materialsen_US
dc.relation.ispartofseriesJournal of Hazardous Materials, Volume 142, Issue 1-2, Page(s) 242-249.en_US
dc.relation.urihttp://dx.doi.org/10.1016/j.jhazmat.2006.08.024en_US
dc.subjectLi/Al LDHsen_US
dc.subjectchromiumen_US
dc.subjectadsorptionen_US
dc.subjectkineticsen_US
dc.subjecthydrotalcite-like compoundsen_US
dc.subjectx-ray-diffractionen_US
dc.subjectphysicochemicalen_US
dc.subjectpropertiesen_US
dc.subjectintercalationen_US
dc.subjectadsorptionen_US
dc.subjectchromateen_US
dc.subjectchromium(vi)en_US
dc.subjectchemistryen_US
dc.subjectexchangeen_US
dc.subjectni(ii)en_US
dc.titleThe removal and recovery of Cr(VI) by Li/Al layered double hydroxide (LDH)en_US
dc.typeJournal Articlezh_TW
dc.identifier.doi10.1016/j.jhazmat.2006.08.024zh_TW
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