Synthesis of carboxyl group functionalized silica composite resin for strontium removal

Siyi Wang; Shunyan Ning; Wei Zhang; Shichang Zhang; Jie Zhou; Xinpeng Wang; Yuezhou Wei

Materials & Design (Jan 2020)

Synthesis of carboxyl group functionalized silica composite resin for strontium removal

Siyi Wang,
Shunyan Ning,
Wei Zhang,
Shichang Zhang,
Jie Zhou,
Xinpeng Wang,
Yuezhou Wei

Affiliations

Siyi Wang: Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, PR China
Shunyan Ning: Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, PR China; Corresponding author. School of Resources, Environment and Materials, Guangxi University, 100 Daxue Road, Nanning, Guangxi, 530004, PR China.
Wei Zhang: Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, PR China
Shichang Zhang: Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, PR China
Jie Zhou: Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, PR China
Xinpeng Wang: Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, PR China
Yuezhou Wei: Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, PR China; School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, PR China

Journal volume & issue: Vol. 185

Abstract

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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

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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