检索结果-南通市图书馆

Efficient adsorption of europium(Ⅲ)and uranium(Ⅵ)by titanate nanorings:Insights into radioactive metal species

Environmental Science and Ecotechnology 2020年第2期2卷 76-85页

作者： Maosheng Zheng Haodong Ji Jun Duan Chenyuan Dang Xingmin Chen Wen Liu The Key Laboratory of Water and Sediment Sciences Ministry of EducationCollege of Environmental Sciences and EngineeringPeking UniversityBeijing100871China The Key Laboratory of Resources and Environmental Systems Optimization Ministry of EducationCollege of Environmental Science and EngineeringNorth China Electric Power UniversityBeijing102206China The Beijing Innovation Center for Engineering Science and Advanced Technology(BIC-ESAT) Peking UniversityBeijing100871China Beijing Engineering Research Center for Advanced Wastewater Treatment Department of Environmental EngineeringPeking UniversityBeijing100871China College of Environmental Science and Engineering Ocean University of ChinaQingdao266100China

Radioactive wastewater containing high concentration of radionuclides poses severe threats to ecosystem and human health,so efficient removal of these toxic heavy metals is urgently *** nanomaterials have been demonstrated good adsorbents for heavy metals due to ion exchange *** this study,titanate nanorings(TNRs)were synthesized using the facile hydrothermal-cooling *** TNRs were composed of sodium trititanate,with a chemical formula of Na_(0.66)H_(1.34)-Ti_(3)O_(7)·0.27H_(2)O and a Na content of 2.38 mmol/*** TNRs demonstrated sufficient adsorption performance to radionuclides europium(Eu)and uranium(U)***,even at a high initial concentration of 50 mg/L,86.5% and 92.6% of the two metal ions can be rapidly adsorbed by the TNRs within 5 min,and equilibrium was reached within 60 min at pH *** maximum adsorption capacity(Qmax)obtained by the Langmuir isotherm model was 115.3 mg/g for Eu(Ⅲ)and 282.5 mg/g for uranium U(Ⅵ)at pH 5,*** adsorption capacities of the two metals under various water chemical conditions were highly related to their *** exchange between metal cations and Na^(+) in the TNR interlayers was the dominant adsorption mechanism,and adsorption of U(Ⅵ)was more complicated because of the co-existence of various uranyl(UO_(2)^(2+))and uranyl-hydroxyl *** spent TNRs were effectively regenerated through an acid-base or ethylenediamine tetraacetic acid(EDTA)treatment and *** the large adsorption capacity and quick kinetic,TNRs are promising materials to remove radionuclides in environmental purification applications,especially emergent treatment of leaked radionuclides.

关键词： titanate nanorings Ion exchange Radionuclides Species Adsorption

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：