物理化学学报
物理化學學報
물이화학학보
ACTA PHYSICO-CHIMICA SINICA
2013年
2期
418-422
,共5页
敖银勇%王茜%彭静%黄玮%翟茂林*%龙兴贵*
敖銀勇%王茜%彭靜%黃瑋%翟茂林*%龍興貴*
오은용%왕천%팽정%황위%적무림*%룡흥귀*
BPC6%铯离子萃取剂%g辐射%辐解产物%气相色谱分析
BPC6%銫離子萃取劑%g輻射%輻解產物%氣相色譜分析
BPC6%색리자췌취제%g복사%복해산물%기상색보분석
BPC6%Cs+ extractant%γ-Radiation%Radiolytic product%Gas chromatography analysis
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.
異丙氧基杯[4]冠-6(1,3-交替-25,27-二(2-丙氧基)杯[4]芳烴-26,28-冠-6,簡稱BPC6)對高放廢液中的放射性Cs離子具有很好的選擇萃取性能,然而在萃取過程中BPC6會受到彊輻射場輻照,所以有必要研究其輻射穩定性.本文應用氣相色譜(GC)、傅裏葉變換顯微紅外(Micro-FTIR)和覈磁共振(NMR)譜等手段分析瞭BPC6固體分彆在O2和N2氣氛下的γ輻照效應.結果錶明,噹劑量為1 MGy時, O2氣氛下BPC6的輻解率明顯高于 N2(分彆約為10.4%和2.5%),而且氣體輻解產物也有很大差異,在 O2氣氛下主要為 H2、CH4、CO 和 CO2,而在N2輻照氣氛下還有C2H4、C2H6、C3H6和C3H8等產物.通過綜閤分析氣體與固體輻解產物,我們提齣BPC6在不同氣氛下具有不同的輻解途徑,這將為 BPC6萃取體繫的輻射效應研究提供新的方法與思路,加深對其輻解機理的認識.
이병양기배[4]관-6(1,3-교체-25,27-이(2-병양기)배[4]방경-26,28-관-6,간칭BPC6)대고방폐액중적방사성Cs리자구유흔호적선택췌취성능,연이재췌취과정중BPC6회수도강복사장복조,소이유필요연구기복사은정성.본문응용기상색보(GC)、부리협변환현미홍외(Micro-FTIR)화핵자공진(NMR)보등수단분석료BPC6고체분별재O2화N2기분하적γ복조효응.결과표명,당제량위1 MGy시, O2기분하BPC6적복해솔명현고우 N2(분별약위10.4%화2.5%),이차기체복해산물야유흔대차이,재 O2기분하주요위 H2、CH4、CO 화 CO2,이재N2복조기분하환유C2H4、C2H6、C3H6화C3H8등산물.통과종합분석기체여고체복해산물,아문제출BPC6재불동기분하구유불동적복해도경,저장위 BPC6췌취체계적복사효응연구제공신적방법여사로,가심대기복해궤리적인식.
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 wil 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 underγ-irradiation conditions. In this work, the radiolysis products including the gaseous and solid products of BPC6 solid were systematical y 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. Final y, a mechanism for the radiolysis of BPC6 under different atmospheres was suggested, in terms of the gas and solid radiolytic products. This work wil be of significant help in understanding the degradation mechanism of the BPC6 extraction system.
