膨胀石墨负载铁氰化铜吸附Cs^(+)特性研究  

Adsorption characteristics of Cs^(+)by expanded graphite loaded with copper ferricyanide

作　　者：刘霂宇 邱杨率[1,2] 张凌燕[1,2] LIU Muyu;QIU Yangshuai;ZHANG Lingyan(School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan Hubei 430070;Hubei Key Laboratory of Mineral Resources Processing and Environment,Wuhan Hubei 430070)

机构地区：[1]武汉理工大学资源与环境工程学院,湖北武汉430070 [2]矿物资源加工与环境湖北省重点实验室,湖北武汉430070

出　　处：《环境污染与防治》2023年第11期1554-1558,共5页Environmental Pollution & Control

摘　　要：核能开发过程中产生的含放射性Cs^(+)废水,给社会带来了巨大隐患。以膨胀石墨为基底材料负载铁氰化铜(CuHCF)颗粒,制备出能够高效去除废水中Cs^(+)的膨胀石墨负载CuHCF复合材料(EG-CuHCF),并分析其吸附机理。结果表明:当接触时间为120 min、反应温度为25℃、CuHCF/膨胀石墨质量比为1.5、EG-CuHCF投加量为6 g/g、初始Cs^(+)为50 mg/L、pH为7时,Cs^(+)去除率达到95.11%。吸附机理主要是膨胀石墨上负载的CuHCF中的K+与溶液中Cs^(+)接触,发生离子交换。EG-CuHCF对Cs^(+)的吸附过程符合准二级动力学模型和Langmuir等温吸附模型,吸附过程是非均相扩散的化学吸附。The wastewater containing radioactive Cs^(+)produced in the process of nuclear energy development has brought great danger to the society.The expanded graphite loaded with copper ferricyanide composite(EG-CuHCF)which could efficiently remove Cs^(+)from wastewater was prepared by using the expanded graphite as the base material,and its adsorption mechanism was analyzed.The results showed that when contact time was 120 min,reaction temperature was 25℃,CuHCF/expanded graphite mass ratio was 1.5,EG-CuHCF dosage was 6 g/g,intial Cs^(+)was 50 mg/L and pH was 7,the removal rate reached 95.11%.And the adsorption mechanism was obtained as follows:K+in CuHCF loaded on expanded graphite contacted with Cs^(+)in solution,and ion exchange occured.The adsorption process of Cs^(+)on EG-CuHCF conformed to the quasi-second-order kinetic model and Langmuir isothermal adsorption model,indicating that the adsorption process was the chemisorption with heterogeneous diffusion.

关 键 词：膨胀石墨 铁氰化铜 Cs^(+) 吸附 

分 类 号：X771[环境科学与工程—环境工程]