柚子皮活性炭对铀的吸附性能研究  

Study on Adsorption Properties of Activated Carbons(PPAC)Prepared by Grapefruit Peel for Uranium

作　　者：常兰[1,2] 向容瑶 张梅 CHANG Lan;XIANG Rong yao;ZHANG Mei(Southwestern Institute of Nuclear Industry & Physics,Chengdu 614001,China;The Engineering Technical College of Chengdu University of Technology,Leshan,Sichuan 614007,China)

机构地区：[1]核工业西南物理研究院,成都610041 [2]成都理工大学工程技术学院,四川乐山614007

出　　处：《四川环境》2020年第5期119-123,共5页Sichuan Environment

基　　金：四川省教育厅重点项目(18ZA0065)。

摘　　要：利用食品废弃物柚子果皮为碳源制备活性炭,研究了其对放射性铀元素的吸附效果。考察了pH值、吸附时间、初始浓度等对吸附的影响,并对不同温度下的吸附数据用langmuir方程和Freundlich方程进行了拟合。结果表明,柚子皮活性炭对铀离子的吸附在120min达到平衡,平衡吸附量随着铀离子初始浓度和吸附剂投加量的增大而增大;柚子皮活性炭对铀的吸附能力随温度的升高而增大,langmuir等温吸附模型更适合描述其吸附行为;在318K时,理论最大吸附容量为12.10mg/g。This study prepared activated carbons(PPAC)from wastes grapefruit peel,and investigated its adsorption effect for uranium.The effect of pH,adsorption time and initial concentration on adsorption were investigated.The adsorption data at different temperatures were analyzed by Langmuir equation and Freundlich equation.The results showed that the adsorption of uranium ions on activated carbon of grapefruit peel reached equilibrium in 120min.The equilibrium adsorption capacity increased with the increase of the initial concentration of uranium ions and the dosage of adsorbent.The adsorption capacity of PPAC for uranium increased with the increase of temperature.Langmuir isothermal adsorption model is more suitable to describe the adsorption behavior of uranium..The theoretical maximum adsorption capacity Qmax was 12.10mg/g at 318K.

关 键 词：活性炭 吸附 铀 

分 类 号：X703[环境科学与工程—环境工程]