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Synthesis of carboxyl group functionalized silica composite resin for strontium removal

Authors :
Siyi Wang
Shunyan Ning
Wei Zhang
Shichang Zhang
Jie Zhou
Xinpeng Wang
Yuezhou Wei
Source :
Materials & Design, Vol 185, Iss , Pp - (2020)
Publication Year :
2020
Publisher :
Elsevier, 2020.

Abstract

Radioactive strontium 90Sr with a half-life of 29 years is one of the most concerned elements in both nuclear accidents and spent fuel reprocessing. Herein, using macroporous silica SiO2 as support, methylacrylic acid as functional monomer and ethylene glycol dimethacrylate as cross-linking agent, a novel resin named SiMaC was prepared via in situ polymerization method for strontium removal. The as-preapred SiMaC was characterized by SEM-EDS, TG-DSC, and BET. Various factors such as pH, m/V, time, and initial concentration of Sr(II) were studied. The maximum adsorption capacity towards Sr(II) was as high as 142.5 mg/g at 298 K. The adsorption equilibrium was almost obtained within 30 min. Moreover, SiMaC was easily and fastly regenerated by 0.1 M HCl and exhibited no obvious decrease in adsorption capacity after five times of successive adsorption-desorption cycles. Most attractively, the uptake rate of Sr(II) reached more than 99% in real river and lake water mediums, as well as reached 76% in real seawater mediums. Finally, XPS and FTIR were used to analyze the adsorption mechanism towards Sr(II). Keywords: Strontium, Polymerization, Adsorption, Synthesis, XPS

Details

Language :
English
ISSN :
02641275
Volume :
185
Issue :
-
Database :
Directory of Open Access Journals
Journal :
Materials & Design
Publication Type :
Academic Journal
Accession number :
edsdoj.1aae09b3b9394d9b9f5a4d841666d036
Document Type :
article
Full Text :
https://doi.org/10.1016/j.matdes.2019.108224