摘要
采用液相还原法制备了羟基磷灰石-铁基复合材料,考察了pH值、吸附材料用量、铀初始质量浓度、反应时间、Mn^(2+)和CO_3^(2-)对羟基磷灰石(HAP)与羟基磷灰石-铁基复合材料去除地下水中的铀效果的影响,利用扫描电子显微镜(SEM)、X射线衍射(XRD)等手段表征分析了HAP和复合材料的结构与物相,并探讨了去除铀的机理。结果表明,复合材料对铀有很好的去除效果,当溶液pH值为5. 0、复合材料投加量为0. 05 g、铀的初始浓度为10 mg/L,60 min时去除率达到98. 53%。反应过程符合准二级动力学方程,能够很好地用Freundlich和Langmuir方程进行拟合。
Hydroxyapatite-Iron matrix composites were synthesized by liquid phase reduction method.The effects of pH value,dosage of the material,initial concentration of Uranium,reaction time and the ions of Mn^2+and CO3^2-on removal uranium from groundwater by hydroxyapatite and composite were investigated respectively.The mechanism was analyzed combining with the characterization results of scanning electron microscope(SEM)and X-ray diffraction(XRD)before and after the material reaction.The results show that the composites has a very good removal effect on uranium.The removal rate reaches 98.53%at 60 minutes when the pH value is 5.0,dosage of composite is 0.05 g and the initial concentration of uranium is 10 mg/L.The reaction process conforms to the quasi-second-order kinetic equation and can be well fitted with the Freundlich and Langmuir equations.
作者
曾华
卢龙
郭亚丹
张卫民
谈施佳
李辉
ZENG Hua;LU Long;GUO Yadan;ZHANG Weiming;TAN Shijia;LI Hui(School of Resources Environmental&Chemical Engineering,Nanchang University,Nanchang 330031,China;Fundamental Science on Radioactive Geology and Exploration Technology Laboratory, East China University of Technology,Nanchang 330013,China;School of Water Resources and Environmental Engineering,East China University of Technology,Nanchang 330013,China)
出处
《有色金属工程》
CAS
CSCD
北大核心
2018年第6期21-26,共6页
Nonferrous Metals Engineering
基金
国家自然科学基金资助项目(41562011
41562011)
江西省教育厅科技计划项目(GJJ150577)
放射性地质与勘探技术国防重点学科实验室开放基金项目(RGET1509)
关键词
羟基磷灰石
铁基
复合材料
铀
动力学
hydroxyapatite
iron matrix
composite
uranium
kinetics
