Citation: AO Yin-Yong, WANG Qian, PENG Jing, HUANG Wei, ZHAI Mao-Lin, LONG Xing-Gui. Influence of Atmosphere on the Radiolysis Products of BPC6 under γ-Irradiation[J]. Acta Physico-Chimica Sinica, ;2013, 29(02): 418-422. doi: 10.3866/PKU.WHXB201211215 shu

Influence of Atmosphere on the Radiolysis Products of BPC6 under γ-Irradiation

AO Yin-Yong ^1,2 ,
WANG Qian ¹ ,
PENG Jing ² ,
HUANG Wei ¹ ,
ZHAI Mao-Lin ^2, ,
LONG Xing-Gui ^1,

1.
1 Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, Sichuan Province, P. R. China;
2 Beijing National Laboratory for Molecular Sciences, Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China

Received Date: 25 September 2012
Available Online: 21 November 2012
Fund Project: 国家自然科学基金(91126014, 11079007, 21073008) (91126014, 11079007, 21073008)高等学校博士点基金(20100001110021)资助项目 (20100001110021)

Bis(2-propyloxy)calix[4]crown-6 (BPC6) is an effective separation agent for the removal of cesium from high-level liquid wastes, because of its high selectivity and coordination capacity toward cesium ions. BPC6 will be exposed to ionizing radiation generated by radionuclides during the treatment of high-level liquid nuclear wastes, so it is necessary to investigate the radiolysis mechanism of BPC6 under γ-irradiation conditions. In this work, the radiolysis products including the gaseous and solid products of BPC6 solid were systematically assessed using gas chromatography (GC), micro Fourier transform infrared (Micro-FTIR) spectroscopy, and nuclear magnetic resonance spectroscopy. The radiolysis ratio for BPC6 in an O₂ atmosphere (approximately 10.4%) was significantly higher than that in an N₂ atmosphere (approximately 2.5%). The main radiolytic gas products of BPC6 under O₂ were H₂, CH₄, CO, and CO₂, while those under N₂ were H₂, CH₄, CO, CO₂, C₂H₄, C₂H₆, C₃H₆, and C₃H₈. Finally, a mechanism for the radiolysis of BPC6 under different atmospheres was suggested, in terms of the gas and solid radiolytic products. This work will be of significant help in understanding the degradation mechanism of the BPC6 extraction system.
- BPC6,
- Cs⁺ extractant,
- γ-Radiation,
- Radiolytic product,
- Gas chromatography analysis
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