辐照气氛对异丙氧基杯[4]冠-6辐解的影响

doi:10.3866/PKU.WHXB201211215

CORC > 北京大学 > 化学与分子工程学院

	辐照气氛对异丙氧基杯[4]冠-6辐解的影响; Influence of Atmosphere on the Radiolysis Products of BPC6 underγ-Irradiation
	敖银勇 ; 王茜 ; 彭静 ; 黄玮 ; 翟茂林* ; 龙兴贵*
刊名	物理化学学报
	2013
关键词	BPC6 铯离子萃取剂 g辐射辐解产物气相色谱分析 BPC6 Cs+ extractant γ-Radiation Radiolytic product Gas chromatography analysis BPC6 Cs+ extractant Upsilon-Radiation Radiolytic product Gas chromatography analysis
DOI	10.3866/PKU.WHXB201211215
英文摘要	异丙氧基杯[4]冠-6(1,3-交替-25,27-二(2-丙氧基)杯[4]芳烃-26,28-冠-6,简称BPC6)对高放废液中的放射性Cs离子具有很好的选择萃取性能,然而在萃取过程中BPC6会受到强辐射场辐照,所以有必要研究其辐射稳定性.本文应用气相色谱(GC)、傅里叶变换显微红外(Micro-FTIR)和核磁共振(NMR)谱等手段分析了BPC6固体分别在O2和N2气氛下的γ辐照效应.结果表明,当剂量为1 MGy时, O2气氛下BPC6的辐解率明显高于 N2(分别约为10.4%和2.5%),而且气体辐解产物也有很大差异,在 O2气氛下主要为 H2、CH4、CO 和 CO2,而在N2辐照气氛下还有C2H4、C2H6、C3H6和C3H8等产物.通过综合分析气体与固体辐解产物,我们提出BPC6在不同气氛下具有不同的辐解途径,这将为 BPC6萃取体系的辐射效应研究提供新的方法与思路,加深对其辐解机理的认识.; 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 Upsilon-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 O-2 atmosphere (approximately 10.4%) was significantly higher than that in an N-2 atmosphere (approximately 2.5%). The main radiolytic gas products of BPC6 under O-2 were H-2, CH4, CO, and CO2, while those under N-2 were H-2, 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.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000314830400028&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 0; 2; 418-422; 29
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/226605]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	敖银勇,王茜,彭静,等. 辐照气氛对异丙氧基杯[4]冠-6辐解的影响, Influence of Atmosphere on the Radiolysis Products of BPC6 underγ-Irradiation[J]. 物理化学学报,2013.
APA	敖银勇,王茜,彭静,黄玮,翟茂林,&龙兴贵.(2013).辐照气氛对异丙氧基杯[4]冠-6辐解的影响.物理化学学报.
MLA	敖银勇,et al."辐照气氛对异丙氧基杯[4]冠-6辐解的影响".物理化学学报 (2013).