Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jcis.2010.04.084
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dc.titleExtended study of DETA-functionalized PGMA adsorbent in the selective adsorption behaviors and mechanisms for heavy metal ions of Cu, Co, Ni, Zn, and Cd
dc.contributor.authorLiu, C.
dc.contributor.authorBai, R.
dc.date.accessioned2014-10-08T08:32:19Z
dc.date.available2014-10-08T08:32:19Z
dc.date.issued2010-10
dc.identifier.citationLiu, C., Bai, R. (2010-10). Extended study of DETA-functionalized PGMA adsorbent in the selective adsorption behaviors and mechanisms for heavy metal ions of Cu, Co, Ni, Zn, and Cd. Journal of Colloid and Interface Science 350 (1) : 282-289. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jcis.2010.04.084
dc.identifier.issn00219797
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/87505
dc.description.abstractIn this paper, the adsorption selectivity and mechanism of diethylenetriamine (DETA)-functionalized PGMA adsorbent (denoted as P-DETA) toward a number of heavy metal ions, including Cu, Co, Ni, Zn, and Cd ions, were experimentally and analytically examined. Experimental results showed a selective adsorption sequence, based on the adsorption affinity, of Cu>Co>Ni>Zn>Cd ions on P-DETA. X-ray absorption fine structure (XAFS) analysis was used to reveal the adsorption coordination geometry, bond length, and coordination number of each type of metal ion with the DETA group. The analysis indicated that Cu, Ni, and Zn ions formed tetrahedral geometry (fourfold coordination) when adsorbed, while Co ion showed an octahedral geometry (sixfold coordination). However, the coordination geometry for Cd could not be obtained in the analysis due to the lack of reference information. The analysis from EXAFS further confirmed that the ratio of DETA ligand to the adsorbed metal ion was probably 1 for Cu, Ni, or Zn ions, while that ratio was 2 for Co ion. From the stability constant (in the logK form) for a metal ion-DETA ligand coordination (denoted as MLn, where M indicates a heavy metal ion, and Ln indicates n numbers of ligands involved), a relationship of logK (CuL)>logK (CoL2)>logK (NiL)>logK (ZnL)>logK (CdL) is suggested. This sequence is in good correlation with the experimentally derived adsorption selective sequence of Cu>Co>Ni>Zn>Cd ions, indicating that the coordination geometry played an important role in the determination of the adsorption selectivity for heavy metal ions by the polyamine-functionalized adsorbent of P-DETA. © 2010 Elsevier Inc.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.jcis.2010.04.084
dc.sourceScopus
dc.subjectAdsorption
dc.subjectCoordination
dc.subjectDETA
dc.subjectHeavy metal ion
dc.subjectSelective
dc.subjectStability constant
dc.typeArticle
dc.contributor.departmentDIVISION OF ENVIRONMENTAL SCIENCE & ENGG
dc.description.doi10.1016/j.jcis.2010.04.084
dc.description.sourcetitleJournal of Colloid and Interface Science
dc.description.volume350
dc.description.issue1
dc.description.page282-289
dc.description.codenJCISA
dc.identifier.isiut000281048300040
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