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有色金属工程:2018,8(6):-
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羟基磷灰石-铁基复合材料去除铀的效果和机理研究
曾 华,卢龙,郭亚丹,张卫民,谈施佳
(南昌大学资源环境与化工学院,南昌大学资源环境与化工学院,东华理工大学水资源与环境工程学院,东华理工大学水资源与环境工程学院,东华理工大学水资源与环境工程学院)
Study on Removal Effect and Mechanism of Uranium by Hydroxyapatite-Iron Matrix composites
Hua Zeng,Long Lu,Yadan Guo,Weiming Zhang and Shijia Tan
(School of Resources Environmental &Chemical Engineering,NanChang University,School of Resources Environmental &Chemical Engineering,NanChang University,School of Water Resources and Environmental Engineering,East China University of Technology,School of Water Resources and Environmental Engineering,East China University of Technology,School of Water Resources and Environmental Engineering,East China University of Technology)
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投稿时间:2017-07-17    修订日期:2018-03-03
中文摘要: 本文采用液相还原法制备羟基磷灰石-铁基复合材料,研究考察pH值、用量、铀初始质量浓度、反应时间、Mn2+ 和 CO32-对羟基磷灰石与复合材料去除地下水中的铀效果的影响,并结合材料反应前后扫描电镜、X衍射等表征分析结果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0.05g(1g/L)、铀的初始浓度为10mg/L,60min时去除率达到98.53%。反应过程符合准二级动力学方程,能很好地用Freundlich和Langmuir方程进行拟合。
中文关键词: 羟基磷灰石  铁基  复合材料    动力学
Abstract:Hydroxyapatite-Iron matrix composites,synthesized by reduction method in aqueous solutions were used to remove Uranium in the groundwater.The effects of pH value, dosage of reaction material,initial concentration of Uranium, reaction time and the ions of Mn2+ and CO32- on removal  uranium by Hydroxyapatite and composite were investigated respectively.The mechanism was analyzed by scanning electron microscope(SEM) and X-ray diffraction(XRD) before and after reaction. The results show that composites has very good removal efficiency on Uranium,the removal rate is up to 98.53% at 60 minutes,when the pH value is 5 and dosage of composite is 0.05g.Moreover, the equilibrium data were wll fitted to Langmuir and Freundlich equations and the kinetic date were well described by the pseudo-second-order kinetic model.
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基金项目:国家自然科学基金(41562011)、江西省教育厅科技计划项目(GJJ150577)、江西省科技落地计划项目(KJLD13054)、东华理工大学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)资助。
引用文本:
曾 华,卢龙,郭亚丹,张卫民,谈施佳.羟基磷灰石-铁基复合材料去除铀的效果和机理研究[J].有色金属工程,2018,8(6):.

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