不溶性腐殖酸对铀的吸附研究  

Study on adsorption of Uranium by insolubilized humic acid

作　　者：魏振[1] 杨晓东[1] 王小玉[2] 祁晓婷[1] 王娟[1,2] 

机构地区：[1]湖北大学化学化工学院,湖北武汉430062 [2]江西省科学院应用化学研究所,江西南昌330029

出　　处：《湖北大学学报（自然科学版）》2012年第1期52-55,共4页Journal of Hubei University：Natural Science

基　　金：江西省自然科学基金(2010GZH0054);湖北省自然科学基金(2009CDB164)资助

摘　　要：通过改变震荡时间、不溶性腐殖酸的投加量、pH值、铀酰离子的浓度等因素,研究不溶性腐殖酸(insolubilized humic acid简写IHA)对铀酰离子(UO22+)的吸附作用.实验表明,在铀酰离子的浓度在4.79×10-5 mol.L-1以上,pH≈7时,不溶性腐殖酸对六价铀有较好的吸附能力,吸附效率在96%以上.对于浓度为1.60×10-4 mol.L-1的铀溶液,不溶性腐殖酸的用量在0.015g左右时,吸附可达饱和.IHA的投加量、pH值、铀酰离子的浓度、震荡时间等对吸附具有明显的影响,研究表明,IHA对铀酰离子的吸附符合一级反应特征,实验数据服从Freundlich等温式.Influence of insolubilized humic acid on adsorption of hexavalent uranium was mainly investigated in this study.Effects of reaction time,pH,concent rations of IHA and concentrations of UO2+2 etc on the adsorption of U(Ⅵ) were examined while the optimum reaction conditions were determined.The results revealed that the removal rate of uranium by insolubilized humic acid was more than 96% in the uranium solution of above 4.79×10-5 mol·L-1 and the pH≈7.0.When the concentrations of was 1.60×10-4 mol·L-1,the dosage of IHA was about 0.015 g,the saturated adsorption could be reached.The pH value,amount of IHA,concentrations of uranium and the reaction time all had considerable influence on the adsorption.The research indicated that the adsorption reaction was one order,met the Freundlich equation.

关 键 词：吸附 不溶性腐殖酸IHA 铀酰离子UO22+ 

分 类 号：O615.2[理学—无机化学]