碱法改性天然沸石对溶液中铯-137的吸附性能研究  

Adsorption Properties of Zeolite Modified by Alkali on Cesium-137 in Solution

作　　者：冯伟伟[1,2] 王定娜 李宛琼 陈云明 刘琢艺[1,2] 梁帮宏 鲁芸芸 刘伟[1] FENG Wei-wei;WANG Ding-na;LI Wan-qiong;CHEN Yun-ming;LIU Zhuo-yi;LIANG Bang-hong;LU Yun-yun;LIU Wei(The First Sub-institute of Nuclear Power Institute of China,Sichuan Chengdu 610005;Sichuan Engineering Laboratory for Nuclear Facilities Decommissioning and Radwaste Management,Sichuan Chengdu 610005,China)

机构地区：[1]中国核动力研究设计院第一研究所,四川成都610005 [2]四川省核设施退役及放射性废物治理工程实验室,四川成都610005

出　　处：《广州化工》2021年第7期81-84,共4页GuangZhou Chemical Industry

摘　　要：铯-137(^(137) Cs)具有迁移性高和半衰期长(30.2a)的特点,核废液中^(137) Cs的安全有效地去除是十分有必要的。文章对产自新疆的天然沸石进行碱法改性,研究了pH值,吸附时间,沸石加入量,共存离子等因素对改性沸石吸附铯的影响,并开展了热试验。结果表明:该碱法改性沸石对铯的平衡吸附量最高可达224.75 mg/g,对铯的一次性去除率可达96.85%,同时该改性沸石对放射性溶液中^(137) Cs具有明显选择吸附能力。^(137) Cs has the characteristics of high mobility and long half-life(30.2a),so it is necessary to remove ^(137) Cs safely and effectively from nuclear waste liquid.The natural zeolite produced in Xinjiang was modified by alkaline method,and the effects of pH value,adsorption time,amount of zeolite added and co-existing ions on the adsorption of cesium by modified zeolite were studied.The results showed that the equilibrium adsorption capacity of the alkali modified zeolite to cesium could reach up to 224.75 mg/g,and the one-time removal rate of cesium could reach 97.54%and the modified zeolite had obvious selective adsorption ability to ^(137) Cs in radioactive solution.

关 键 词：改性沸石 吸附 铯-137 

分 类 号：X771[环境科学与工程—环境工程] TQ424.23[化学工程]