不同甲硝比对模拟高放废液脱硝的影响  

Effect of Different Formic Acid to Nitrate Ratio on Denitration of Simulated High Level Liquid Waste

作　　者：王长福 朱冬冬[1] 李玉松 汪润慈 谭盛恒 刘丽君[1] 张生栋[1] WANG Chang-fu;ZHU Dong-dong;LI Yu-song;WANG Run-ci;TAN Sheng-heng;LIU Li-jun;ZHANG Sheng-dong(China Institute of Atomic Energy,P.O.Box 275(93),Beijing 102413,China)

机构地区：[1]中国原子能科学研究院放射化学研究所,北京102413

出　　处：《核化学与放射化学》2020年第5期330-335,I0002,共7页Journal of Nuclear and Radiochemistry

摘　　要：研究了甲酸作为脱硝剂对模拟高放废液脱硝的影响。结果表明:脱硝率随着甲硝比的增加而增加;当甲硝比为1.4时,脱硝后溶液的pH最高;脱硝过程中各元素在沉淀中的含量与甲硝比有关,脱硝产物的热重分析(TGA)表明,甲硝比从1.0→1.6时,随着甲硝比的增加,热分解失重量从45%→35%,热分解终止温度为570~620℃。It was investigated that the denitration of a simulated high level liquid waste using formic acid at 90℃under different formic acid to nitrate ratio(r).The results show that the denitration efficiency increases with the increase of the formic acid to nitrate ratio,and the amounts of precipitating components after denitration vary with formic acid to nitrate ratio.When the formic acid to nitrate ratio is 1.4,the pH of the solution is the highest after denitration.Thermogravimetric analysis for denitration products suggests that the weight loss decreases from 45%to 35%and the temperature of complete decomposition is between 570℃to 620℃with increasing formic acid to nitrate ratio from 1.0 to 1.6.

关 键 词：模拟高放废液 脱硝 甲硝比 甲酸 

分 类 号：TL941[核科学技术—辐射防护及环境保护]