浸渍活性炭自然老化后的理化性能变化研究  

Study on physical and chemical properties of impregnated activated carbon after natural aging

作　　者：王坤俊[1] 邓才远[2] 杜建兴[2] 任宏正 张计荣[1] 刘鲜丽 WANG Kun-jun;DENG Cai-yuan;DU Jian-xing;REN Hong-zheng;ZHANG Ji-rong;LIU Xian-li(China Institute for Radiation Protection,Taiyuan 030006,China;Daya Bay Nuclear Power Operations and Management Co.,Ltd.,Shenzhen 518124,China)

机构地区：[1]中国辐射防护研究院,山西太原030006 [2]大亚湾核电运营管理有限责任公司,广东深圳518124

出　　处：《应用化工》2021年第2期423-427,437,共6页Applied Chemical Industry

基　　金：山西省应用基础研究计划项目(201701D221095);中国核工业集团有限公司“青年英才-菁英项目”(JY18030603)。

摘　　要：对自然老化的浸渍活性炭的关键物理性能、热稳定性及吸附放射性碘效率等进行测试,以指导其在核设施通风净化系统中的工程应用。结果表明,自然存放老化60个月的浸渍活性炭,其CCl4吸附率、粒度、强度等物理性能指标以及孔结构参数未有显著变化(为自然老化后的废旧活性炭再生利用提供了重要依据);但其pH值已从初始的9.7下降至9.2左右,这与吸附放射性甲基碘效率的下降趋势相似,该效率值从初始的99.64%下降到60个月后的97.16%,TG测试表明,研究时间段内的样品其热稳定性随时间变化不显著,且失重过程基本一致。To guide the engineering application in the ventilation and purification system of nuclear facilities,the key physical properties,thermal stability and adsorption efficiency of radioactive iodine of impregnated activated carbon with different natural aging time were analyzed.The result showed that there was no significant change in physical properties such as CCl_(4) adsorption rate,particle size,strength and pore structure parameters of impregnated activated carbon that had been aged naturally for 60 months,which provided an important basis for the research on the regeneration of waste activated carbon after natural aging.However,its pH value has decreased from the initial 9.7 to about 9.2,which is similar to the decreasing trend of the adsorption efficiency of radioactive methyl iodine.The efficiency has decreased from the initial 99.64% to 97.16% after 60 months.TG test showed that the thermal stability of the samples during the study period did not change significantly with time,and the weight loss process was basically the same.

关 键 词：浸渍活性炭 自然老化 物理性能 吸附效率 失重 

分 类 号：TQ110.9[化学工程—无机化工] TL941[核科学技术—辐射防护及环境保护]