Catalytic effect of cesium on the oxidation behavior of cation exchange resins in Li2CO3-Na2CO3-K2CO3 melt

被引：9

作者：

Zheng, Yang-Hai ^{[1
]}

Yan, Yong-De ^{[1
,2
,3
]}

Xue, Yun ^{[1
,2
,3
]}

Wang, Yue-Lin ^{[1
]}

Liu, Xin ^{[1
]}

Mi, Wan-Sheng ^{[4
]}

Zhang, Qing-Guo ^{[1
]}

Li, Yu ^{[1
]}

Ma, Fu-Qiu ^{[1
,2
,3
]}

Zhang, Mi-Lin ^{[1
]}

Gan, Zhi-Hao ^{[1
]}

Zhu, Kai ^{[1
]}

机构：

[1] Harbin Engn Univ, Harbin 150001, Peoples R China

[2] Harbin Engn Univ, Yantai Res Inst, Yantai 264006, Shandong, Peoples R China

[3] Harbin Engn Univ, Grad Sch, Yantai 264006, Shandong, Peoples R China

[4] CSIC, Res Inst 703, Harbin 150078, Peoples R China

来源：

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH | 2022年 / 29卷 / 42期

基金：

中国国家自然科学基金;

关键词：

Molten salt oxidation; Carbonate salt; Cation exchange resin; Cesium sulfate; Lithium peroxide; Radioactive waste; MOLTEN-SALT OXIDATION; RADIOACTIVE RESINS; SOLIDIFICATION; DESTRUCTION; DEGRADATION; PYROLYSIS; DIOXIDE; SO2;

D O I：

10.1007/s11356-022-22158-x

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

After the treatment of liquid radioactive waste, there is a certain amount of Cs in the waste resin, and these Cs-doped resins are prone to volatilize during the thermal treatment process and cause radionuclide leakage. The molten salt oxidation (MSO) can effectively prevent the volatilization of toxic metal, especially the volatilization of Cs. Under nitrogen and air conditions, it is found that the oxidation behavior between Cs-doped and clean cation exchange resins (CERs) is quite different. In the presence of oxygen and molten carbonate salt, Cs2CO3 is generated by the destruction of functional groups in Cs-doped CERs. The Cs2CO3 in Na2CO3-K2CO3-Li2CO3 reacts with oxygen to form Li2O2, which reduces the content of S in residue from 26.33 to 13.38% in air conditions at 400 degrees C and promotes the generation of sulfate in the molten carbonate salt. The elements Cs and S in the Cs doped CERs spontaneously form thermally stable Cs2SO4 in the molten carbonate salt.

引用

页码：64215 / 64224

页数：10

共 52 条

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