Efficient adsorption of Cs(I) and Sr(II) ions from solution by xanthate modified sponge-like chitosan

被引：0
作者：
Xu, Bowen [1 ]
Tian, Huiyu [3 ]
Chen, Jianbo [3 ]
Wei, Lifeng [4 ]
Kai, Wang [4 ]
Wang, Jianlong [1 ,2 ]
机构：
[1] Tsinghua Univ, Lab Environm Technol, INET, Beijing 100084, Peoples R China
[2] Tsinghua Univ, Beijing Key Lab Radioact Waste Treatment, INET, Beijing 100084, Peoples R China
[3] Fujian Ningde Nucl Power Co Ltd, Ningde 355200, Peoples R China
[4] China Datang Nucl Power Co Ltd, Beijing 100033, Peoples R China
来源：
NUCLEAR ENGINEERING AND DESIGN | 2025年 / 437卷
关键词：
Radionuclides; Adsorption; Chitosan-based adsorbent; Chemical modification; Adsorption mechanism; HEAVY-METALS; COMPETITIVE ADSORPTION; AQUEOUS-SOLUTIONS; WASTE-WATER; REMOVAL; ADSORBENT; EQUILIBRIUM; BIOSORPTION; COMPOSITE; MECHANISM;
D O I：
10.1016/j.nucengdes.2025.114031
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
Efficient removal of radionuclides from radioactive wastewater is vital for ensuring the sustainable development of nuclear energy. Herein, xanthate-modified sponge-like chitosan-based adsorbent (CTS-SX) was synthesized through a facile method, which exhibited excellent adsorption performance for Sr(II) and Cs(I). The maximum adsorption capacity of Sr(II) and Cs(I) reached 76.21 and 133.15 mg center dot g(-1) respectively. Various models were used to fit the adsorption process, and the results indicated that the adsorption process of Sr(II) was best fitted by Freundlich isotherm model and phenomenological internal mass transfer kinetic model, while the adsorption of Cs(I) was best fitted by Langmuir isotherm model and Langmuir kinetics model. In addition, the adsorption performance in binary-component system, influence of pH and competing ions were also explored. In summary, the modification could improve the amount of active sites and hydrophobility of CTS-SX. With excellent adsorption performance and simplicity of separation, CTS-SX has potential in application for radioactive wastewater treatment.
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页数：11
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