摘要
研究了用某尾矿库周边稻田土吸附废水中的钍,通过静态吸附试验考察了废水初始pH、吸附时间、初始Th(Ⅳ)质量浓度、有机酸-无机酸盐对废水中钍的吸附行为,并进行了吸附动力学模型和等温吸附模型拟合,探讨了吸附机制。结果表明:针对初始Th(Ⅳ)质量浓度为100 mg/L的含钍废水,在废水初始pH=4~5、吸附时间6 h适宜条件下,Th(Ⅳ)吸附量达1.99 mg/g,吸附率达99.59%;稻田土对废水中Th(Ⅳ)的吸附过程为物理-化学吸附,吸附机制主要是均一的单分子层吸附和非均一的多分子层吸附共存。
The adsorption of thorium on paddy soil surrounding the tailing reservoir was studied.The effects of solution pH,adsorption time,initial Th(Ⅳ)mass concentration and organic acid-inorganic salts on adsorption behavior of thorium was investigated by static adsorption tests.The adsorption kinetics model and isothermal adsorption model were fitted to analyze the adsorption mechanism.The results show that under the conditions of initial Th(Ⅳ)mass concentration of 100 mg/L,wastewater pH=4~5,and adsorption time of 6 h,the adsorption capacity of Th(Ⅳ)can reach 1.99 mg/g and the adsorption rate can reach 99.59%.The adsorption process of Th(Ⅳ)on paddy soil is physico-chemical adsorption,and the adsorption mechanism is mainly homogeneous monolayer adsorption and heterogeneous multimolecular layer adsorption.
作者
翁兴潘
刘媛媛
宋勇
高柏
文琪
陈功新
张春艳
吴琳伟
WENG Xingpan;LIU Yuanyuan;SONG Yong;GAO Bai;WEN Qi;CHEN Gongxin;ZHANG Chunyan;WU Linwei(Fundamental Science on Radioactive Geology and Exploration Technology Laboratory,East China University of Technology,Nanchang 330013,China;Faculty of Water Resource and Environmental Engineering,East China University of Technology,Nanchang 330013,China;Nonferrous Geology Brigade,Jiangxi Geological Bureau,Ganzhou 341000,China)
出处
《湿法冶金》
CAS
北大核心
2023年第6期602-607,共6页
Hydrometallurgy of China
基金
国家自然科学基金资助项目(42272301)
放射性地质与勘探技术国防重点学科实验室开放基金资助项目(2020RGET08)
江西省地质局青年科学技术带头人项目(2023JXDZKJRC08)。
关键词
稻田土
废水
钍
吸附
机制
动力学
paddy soil
wastewater
thorium
adsorption
mechanism
kinetics
