摘要
利用人工合成的针铁矿(α-FeOOH)作为吸附剂,对针铁矿吸附铀废水中U(VI)的影响因素、吸附动力学和吸附等温线进行了研究。探讨在不同pH值、吸附剂投加量和初始铀的质量浓度条件下针铁矿对U(VI)的吸附特性。研究结果表明:当温度为25℃、U(VI)浓度为10 mg/L、pH值为6、投加量为0.6 g/L时,针铁矿对U(VI)的吸附率最高可达98.44%;针铁矿对U(VI)的吸附符合准二级动力学方程,说明针铁矿对U(VI)的吸附主要是化学吸附;Freundlich等温吸附模型能更好地拟合针铁矿对U(VI)的吸附过程,说明针铁矿对U(VI)的吸附属于多层吸附。
Using synthetic goethite(α-FeOOH)as adsorbent,the influence factors,adsorption kinetics and adsorption isotherm of absorption of uranium on goethite(α-FeOOH)were studied.The effects of pH,amount of absorbent,initial U(VI)concentration on removal of U(VI)by goethite were investigated.The results showed that the removal rate could reach 98.44%when the temperature was 25℃,the initial concentration of U(VI)was 10 mg/L,pH=6 and dosage of goethite was 0.6 g/L.The adsorption process followed well with the pseudo-second-order kinetic equation,indicated that the adsorption is mainly the chemical adsorption.The adsorption isotherm for the adsorbent was consistent with the Freundlich adsorption model,meaning the adsorbent is mainly involved with multilayer adsorption.
作者
丁德馨
尤青
於照惠
戴仲然
DING Dexin;YOU Qing;YU Zhaohui;DAI Zhongran(Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy,Hengyang,Hunan 421001,China;Hunan Province Key Laboratory of Green Development Technology for Extremely Low Grade Uranium Resources,University of South China,Hengyang,Hunan 421001,China)
出处
《南华大学学报（自然科学版）》
2020年第6期6-11,共6页
Journal of University of South China：Science and Technology
基金
国家自然科学基金核技术创新联合基金重点项目(U1967210)
国家自然科学基金面上项目(11775106)。
关键词
针铁矿
铀
吸附
吸附动力学
goethite
uranium(VI)
adsorption
adsorption kinetics
