Issue 56, 2018, Issue in Progress

Decontamination of radionuclides by functionalized mesoporous silica under gamma irradiation

Abstract

Schiff base functionalized mesoporous silica (SA-SBA-15) was synthesized by the co-condensation method to remove the radioactive corrosion products from contaminated water coming from nuclear installations. SA-SBA-15 nanoparticles were first irradiated in a solid powder form and then applied to remove Cu(II), Ni(II), and Co(II) from their aqueous mixture in the range from 0 to 1000 Gy of gamma irradiation. The FTIR, TGA, zeta potential, XRD, BET, TEM, and CHN analysis results revealed the stability of a ligand support material, mesopore ordering and the functional groups. The structural and functional group endurance under our studied gamma irradiation makes SA-SBA-15 a potential adsorbent for routine decontamination and decommissioning activities as well as in radioactively contaminated emergency scenarios. Furthermore, the adsorbent-metal complexation followed the Irving–Williams order (Cu(II) > Ni(II) > Co(II)) and showed a higher selectivity for Cu(II) with removal capacity up to 99.76 ± 0.01%, thus suggesting its applicability to separate Cu(II) from other metal ions.

Graphical abstract: Decontamination of radionuclides by functionalized mesoporous silica under gamma irradiation

Article information

Article type
Paper
Submitted
12 Jul 2018
Accepted
11 Sep 2018
First published
18 Sep 2018
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2018,8, 32211-32220

Decontamination of radionuclides by functionalized mesoporous silica under gamma irradiation

S. Iqbal and J. Yun, RSC Adv., 2018, 8, 32211 DOI: 10.1039/C8RA05939J

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