氧化物TiO_(2)的合成及对含^(63)Ni放射性废液的吸附行为研究  

Study on the Synthesis of Oxide TiO2 and Its Adsorption Behavior on Radioactive Waste Containing 63Ni

作　　者：任春侠 刘明阳 高岩 Ren Chunxia;Liu Mingyang;Gao Yan(HTA.Co.,Ltd.,Beijing 102413,China)

机构地区：[1]原子高科股份有限公司,北京102413

出　　处：《广东化工》2024年第6期41-44,共4页Guangdong Chemical Industry

摘　　要：吸附法具有操作简单,绿色环保的优点,在放射性废液处理方面受到越来越多的关注。本文采用水热法合成了TiO_(2)吸附剂,对其进行了SEM、XRD、BET表征。之后研究了接触时间对吸附^(63)Ni^(2+)的影响,结果表明TiO_(2)对^(63)Ni^(2+)的吸附在10 min即可达平衡,去除率高达99.3%。该吸附过程符合Langmuir吸附模型和拟二级动力学方程,在25℃时最大吸附容量为32.1 mg/L。TiO_(2)可以在pH=3~12的范围内有效的吸附^(63)Ni^(2+),当放射性废液中K+浓度大于0.5 mol/L时吸附过程会受其影响。该研究对含63Ni^(2+)放射性废液的处理提供了一个新的思路。The adsorption method is gaining increasing attention in the treatment of radioactive waste liquid due to its advantages of simplicity and environmental friendliness.In this study,TiO_(2) adsorbent was synthesized using the hydrothermal method and characterized through SEM,XRD,and BET analysis.Subsequently,the impact of contact time on the adsorption of ^(63)Ni^(2+) was investigated.The results revealed that equilibrium for ^(63)Ni^(2+) adsorption onto TiO2 could be achieved within 10 minutes with a remarkable removal rate of 99.3%.The adsorption process followed both Langmuir's adsorption model and pseudo-second-order kinetic equation,with a maximum adsorption capacity of 32.1 mg/L at 25℃.Moreover,TiO_(2) demonstrated efficient capability in capturing ^(63)Ni^(2+) over a wide pH range(3-12),although its performance was influenced by K+when the concentration exceeded 0.5 mol/L.This study presents a novel approach for treating radioactive waste liquid containing ^(63)Ni^(2+) .

关 键 词：TiO_(2) 吸附 ^(63)Ni^(2+) 

分 类 号：TQ[化学工程]