File Download

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)
Related Researcher

이준희

Lee, Jun Hee
Quantum Materials for Energy Conversion Lab.
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

Chromium removal from aqueous solution by a PEI-silica nanocomposite

Author(s)
Choi, KeunsuLee, SoonjaePark, Jin OckPark, Jeong-AnnCho, So-HyeLee, Seung YongLee, Jun HeeChoi, Jae-Woo
Issued Date
2018-01
DOI
10.1038/s41598-018-20017-9
URI
https://scholarworks.unist.ac.kr/handle/201301/23673
Fulltext
https://www.nature.com/articles/s41598-018-20017-9
Citation
SCIENTIFIC REPORTS, v.8, pp.1438
Abstract
It is essential and important to determine the adsorption mechanism as well as removal efficiency when using an adsorption technique to remove toxic heavy metals from wastewater. In this research, the removal efficiency and mechanism of chromium removal by a silica-based nanoparticle were investigated. A PEI-silica nanoparticle was synthesized by a one-pot technique and exhibited uniformly well-dispersed PEI polymers in silica particles. The adsorption capacity of chromium ions was determined by a batch adsorption test, with the PEI-silica nanoparticle having a value of 183.7 mg/g and monolayer sorption. Adsorption of chromium ions was affected by the solution pH and altered the nanoparticle surface chemically. First principles calculations of the adsorption energies for the relevant adsorption configurations and XPS peaks of Cr and N showed that Cr(VI), [HCrO4](-) is reduced to two species, Cr(III), CrOH2+ and Cr3+, by an amine group and that Cr(III) and Cr(VI) ions are adsorbed on different functional groups, oxidized N and NH3+.
Publisher
NATURE PUBLISHING GROUP
ISSN
2045-2322
Keyword
AUGMENTED-WAVE METHODACTIVATED CARBONMESOPOROUS ADSORBENTSHEXAVALENT CHROMIUMCO2 CAPTUREADSORPTION PERFORMANCEVI REMOVALCR(VI)CHROMATESURFACE

qrcode

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.