Efficient separation of strontium radionuclides from high-salinity wastewater by zeolite 4A synthesized from Bayer process liquids

Abstract The efficient, selective, and economical sorbents for the removal of Sr radionuclides are largely needed for the decontamination of effluents with high salinity. In this study, the removal of Sr was investigated using the zeolite produced from the Bayer process liquids. Based on the XRD, SE...

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Autores principales: Ivana Smičiklas, Ivana Coha, Mihajlo Jović, Marijana Nodilo, Marija Šljivić-Ivanović, Slavko Smiljanić, Željko Grahek
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Publicado: Nature Portfolio 2021
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spelling oai:doaj.org-article:5a109b798e364f879c72eb070b30e04b2021-12-02T13:57:13ZEfficient separation of strontium radionuclides from high-salinity wastewater by zeolite 4A synthesized from Bayer process liquids10.1038/s41598-021-81255-y2045-2322https://doaj.org/article/5a109b798e364f879c72eb070b30e04b2021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-81255-yhttps://doaj.org/toc/2045-2322Abstract The efficient, selective, and economical sorbents for the removal of Sr radionuclides are largely needed for the decontamination of effluents with high salinity. In this study, the removal of Sr was investigated using the zeolite produced from the Bayer process liquids. Based on the XRD, SEM/EDS analysis, the product was pure and highly crystalline zeolite 4A (Z4A). Removal of Sr was fast (5 min for 100% removal at 8.80 mg/L), with high maximum sorption capacity (252.5 mg/L), and independent on the initial pH in the range 3.5–9.0. Specific sorption of Sr by protonated groups on the Z4A surface was operating in addition to ion-exchange with Na ions. The selectivity of Z4A decreased in the order Sr > Ca > K > Mg > Na. 84% of Sr was separated from seawater within 5 min, at the Z4A dose of 5 g/L, while efficiency increased to 99% using the dose of 20 g/L. Desorption of radioisotope 89Sr from seawater/Z4A solid residue was very low in deionized water (0.1–0.2%) and groundwater (0.7%) during 60 days of leaching. Z4A is a cost-effective, selective, and high-capacity medium for Sr removal, which provides high stability of retained radionuclides.Ivana SmičiklasIvana CohaMihajlo JovićMarijana NodiloMarija Šljivić-IvanovićSlavko SmiljanićŽeljko GrahekNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Ivana Smičiklas
Ivana Coha
Mihajlo Jović
Marijana Nodilo
Marija Šljivić-Ivanović
Slavko Smiljanić
Željko Grahek
Efficient separation of strontium radionuclides from high-salinity wastewater by zeolite 4A synthesized from Bayer process liquids
description Abstract The efficient, selective, and economical sorbents for the removal of Sr radionuclides are largely needed for the decontamination of effluents with high salinity. In this study, the removal of Sr was investigated using the zeolite produced from the Bayer process liquids. Based on the XRD, SEM/EDS analysis, the product was pure and highly crystalline zeolite 4A (Z4A). Removal of Sr was fast (5 min for 100% removal at 8.80 mg/L), with high maximum sorption capacity (252.5 mg/L), and independent on the initial pH in the range 3.5–9.0. Specific sorption of Sr by protonated groups on the Z4A surface was operating in addition to ion-exchange with Na ions. The selectivity of Z4A decreased in the order Sr > Ca > K > Mg > Na. 84% of Sr was separated from seawater within 5 min, at the Z4A dose of 5 g/L, while efficiency increased to 99% using the dose of 20 g/L. Desorption of radioisotope 89Sr from seawater/Z4A solid residue was very low in deionized water (0.1–0.2%) and groundwater (0.7%) during 60 days of leaching. Z4A is a cost-effective, selective, and high-capacity medium for Sr removal, which provides high stability of retained radionuclides.
format article
author Ivana Smičiklas
Ivana Coha
Mihajlo Jović
Marijana Nodilo
Marija Šljivić-Ivanović
Slavko Smiljanić
Željko Grahek
author_facet Ivana Smičiklas
Ivana Coha
Mihajlo Jović
Marijana Nodilo
Marija Šljivić-Ivanović
Slavko Smiljanić
Željko Grahek
author_sort Ivana Smičiklas
title Efficient separation of strontium radionuclides from high-salinity wastewater by zeolite 4A synthesized from Bayer process liquids
title_short Efficient separation of strontium radionuclides from high-salinity wastewater by zeolite 4A synthesized from Bayer process liquids
title_full Efficient separation of strontium radionuclides from high-salinity wastewater by zeolite 4A synthesized from Bayer process liquids
title_fullStr Efficient separation of strontium radionuclides from high-salinity wastewater by zeolite 4A synthesized from Bayer process liquids
title_full_unstemmed Efficient separation of strontium radionuclides from high-salinity wastewater by zeolite 4A synthesized from Bayer process liquids
title_sort efficient separation of strontium radionuclides from high-salinity wastewater by zeolite 4a synthesized from bayer process liquids
publisher Nature Portfolio
publishDate 2021
url https://doaj.org/article/5a109b798e364f879c72eb070b30e04b
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