Chromium removal from aqueous solution by a PEI-silica nanocomposite

Keunsu Choi, Soon-Jae Lee, Jin Ock Park, Jeong Ann Park, So Hye Cho, Seung Yong Lee, Jun Hee Lee, Jae Woo Choi

Research output: Contribution to journalArticle

24 Citations (Scopus)

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 +.

Original languageEnglish
Article number1438
JournalScientific Reports
Volume8
Issue number1
DOIs
Publication statusPublished - 2018 Dec 1

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Nanocomposites
Chromium
Silicon Dioxide
Adsorption
Nanoparticles
Ions
Poisons
Waste Water
Heavy Metals
Amines
Polymers
Research

ASJC Scopus subject areas

  • General

Cite this

Choi, K., Lee, S-J., Park, J. O., Park, J. A., Cho, S. H., Lee, S. Y., ... Choi, J. W. (2018). Chromium removal from aqueous solution by a PEI-silica nanocomposite. Scientific Reports, 8(1), [1438]. https://doi.org/10.1038/s41598-018-20017-9

Chromium removal from aqueous solution by a PEI-silica nanocomposite. / Choi, Keunsu; Lee, Soon-Jae; Park, Jin Ock; Park, Jeong Ann; Cho, So Hye; Lee, Seung Yong; Lee, Jun Hee; Choi, Jae Woo.

In: Scientific Reports, Vol. 8, No. 1, 1438, 01.12.2018.

Research output: Contribution to journalArticle

Choi, K, Lee, S-J, Park, JO, Park, JA, Cho, SH, Lee, SY, Lee, JH & Choi, JW 2018, 'Chromium removal from aqueous solution by a PEI-silica nanocomposite', Scientific Reports, vol. 8, no. 1, 1438. https://doi.org/10.1038/s41598-018-20017-9
Choi, Keunsu ; Lee, Soon-Jae ; Park, Jin Ock ; Park, Jeong Ann ; Cho, So Hye ; Lee, Seung Yong ; Lee, Jun Hee ; Choi, Jae Woo. / Chromium removal from aqueous solution by a PEI-silica nanocomposite. In: Scientific Reports. 2018 ; Vol. 8, No. 1.
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