Simultaneous removal of radioactive cesium and strontium from seawater using a highly efficient Prussian blue-embedded alginate aerogel

被引：54
作者：
Eun, Semin [1 ]
Ryu, Jungho [2 ]
Kim, Hyuncheol [3 ,4 ]
Hong, Hye-Jin [5 ]
Kim, Soonhyun [1 ,6 ]
机构：
[1] Daegu Gyeongbuk Inst Sci & Technol DGIST, Div Energy Technol, Daegu 42988, South Korea
[2] Korea Inst Geosci & Mineral Resources KIGAM, Geol Environm Res Div, Daejeon 34132, South Korea
[3] Korea Atom Energy Res Inst KAERI, Nucl Emergency & Environm Protect Div, Daejeon 34057, South Korea
[4] Univ Sci & Technol, Radiochem & Nucl Nonproliferat, 217 Gajeong Ro, Daejeon 34113, South Korea
[5] Chungbuk Natl Univ, Dept Environm Engn, Cheongju 28644, Chungbuk, South Korea
[6] Daegu Gyeongbuk Inst Sci & Technol DGIST, Dept Interdisciplinary Engn, Daegu 42988, South Korea
来源：
JOURNAL OF ENVIRONMENTAL MANAGEMENT | 2021年 / 297卷
基金：
新加坡国家研究基金会;
关键词：
Alginate; (CS)-C-137; PB-alginate aerogel; Prussian blue; Sr-90; FUKUSHIMA NUCLEAR ACCIDENT; CALCIUM ALGINATE; ADSORPTION; BEADS; WASTE; RADIONUCLIDES; COMPOSITE; MECHANISM; ADSORBENT; BEHAVIOR;
D O I：
10.1016/j.jenvman.2021.113389
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Radioactive cesium (Cs-137) and strontium (Sr-90) contaminants in seawater have been a serious problem since the Fukushima accident in 2011 due to their long-term health risks. For the effective and simultaneous removal of radioactive cesium (Cs-137) and strontium (Sr-90) from seawater, a Prussian blue (PB)-immobilized alginate aerogel (PB-alginate aerogel) was fabricated and its adsorption performance was evaluated. PB nanoparticles were homogeneously dispersed in the three-dimensional porous alginate aerogel matrix, which enabled facile contact with seawater. The PB-alginate aerogel exhibited Cs+ and Sr2+ adsorption capacities of 19.88 and 20.10 mg/g, respectively, without substantial interference because Cs+ and Sr2+ adsorption occurred at different adsorption sites on the composite. The Cs+ and Sr2+ adsorption onto the PB-alginate aerogel was completed within 3 h due to the highly porous morphology of the aemgel. The Cs+ and Sr2+ adsorption behaviors on the PB-alginate aemgel were systematically investigated under various conditions. Compared with Cs+ adsorption, Sr2+ adsorption onto the PB-alginate aerogel was more strongly influenced by competing cations (Na+, Mg2+, Ca2+, and K+) in seawater. Cs-137 and Sr-90 removal tests in real seawater demonstrated the practical feasibility of the PB-alginate aerogel as an adsorbent.
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页数：9
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