摘要
通过静态吸附实验,探讨了改性HA对U(Ⅵ)吸附影响。考查pH值、时间、U(Ⅵ)的初始浓度和温度等对吸附的影响。结果表明:pH值对改性腐殖酸的吸附效果影响较大,改性腐殖酸吸附U(Ⅵ)的最佳pH值为6,最大去除率为99.37%,吸附在60 min内基本达到平衡。UO22+在改性腐殖酸上的吸附是放热过程,符合Freundlich等温吸附方程,相关系数达0.99以上,表明IHA对铀的吸附是以表面为主要吸附位,并不是均匀的单层吸附。图8,参9.
The mechanism of adsorption has been discussed by static adsorption experiment. Check the pH,time,and U（ Ⅵ） the influence of initial concentration and temperature on adsorption. Results show that the pH value on the absorption effect of modified HA is larger,the modified humic acid adsorption U（ Ⅵ） the best pH value is 6,the maximum removal rate was 99. 37%,the adsorption of basic balance within 60 min. UO22 ＋adsorption on the modified humic acid is exothermic process,accord with the Freundlich isothermal adsorption equation,the correlation coefficient of 0. 99 above. It shows that IHA for uranium adsorption on the surface as the main adsorption,monolayer adsorption is not uniform. 8figs.,9refs.
出处
《湖南生态科学学报》
CAS
2014年第2期23-28,共6页
Journal of Hunan Ecological Science
基金
国家自然科学基金项目(编号:41175117)
湖南省科技厅项目(编号:2010FJ4121)
