检索结果-南通市图书馆

Kinetics and thermodynamics modeling of Nd(Ⅲ) removal from aqueous solution using modified Amberlite XAD7

Journal of Rare Earths 2020年第3期38卷 306-314页

作者： Petru Negrea Andreea Gabor Corneliu Mircea davidescu Mihaela Ciopec Adina Negrea Narcis Duteanu Politehnica University of Timisoara Faculty of Industrial Chemistry and Environmental Engineering 2 Piata Victoriei RO 300006 Timisoara Romania

New adso rbent material was obtained by modification of commercial Amberlite XAD7 with thiourea that represents a non-toxic,cheap and environmentally friendly *** adsorbent was used for removal of neodymium ions from aqueous *** modified Amberlite involved in this study shows good adsorption capacities(74.3 mg/g) and excellent efficiency during Nd removal *** order to elucidate the mechanism of the Nd adsorption process kinetic,thermodynamic and equilibrium studies were performed,establishing this way which kinetic model better describes the Nd adsorption *** the thermodynamic studies prove that the Nd adsorption on thiourea modified Amberlite XAD7 is an endothermic and spontaneous process.

关键词： Neodymium Amberlite XAD7 Adsorption mechanism Adsorption isotherm Thiourea Rare earths

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Performance Evaluation of the Fe-IR-120（Na）-DEHPA Impregnated Resin in the Removal Process of As（V） from Aqueous Solution

引用

材料科学与工程（中英文B版） 2011年第4期1卷 421-432页

作者： Mihaela Ciopec Adina Negrea Lavinia Lupa Comeliu davidescu Petru Negrea Paula Sfarloaga Faculty of Industrial Chemistry and Environmental Engineering University ＂Politehnica＂ Timisoara Piata Victoriei No.2Timisoara 300006 Romania National Institute for Research and Development in Electrochemistry and Condensed Matter Timisoara Plautius AndronescuNo. 1 Timisoara 300224 Romania

In the present paper the performance of a new functionalized material Fe-IR-120(Na)-DEHPA in the removal process of As(V) from aqueous solutions, has been investigated. The new material was obtained trough impregnation of Amberlite IR-120(Na) with di(2-ethylhexyl) phosphoric acid (DEHPA) trough the dry method. Trough impregnation of the Amberlite IR-120(Na) was obtained a resin with two functional groups which was further loaded with Fe(III) ions because of the high affinity of arsenic towards iron. The physicochemical methods of analysis (FTIR spectroscopy, EDX and SEM) approved that the impregnation with DEHPA and the iron loading, respectively, occurred. By applying the kinetic model to the experimental data it was found that the removal of As(V) ions by Fe-IR-120(Na)-DEHPA follows the pseudo-second-order rate kinetics. The linear Langmuir and Freundlich isotherm models were used to represent the experimental data and these could be well interpreted by the Langmuir isotherm. RL values between 0 and 1.0 further indicate a favorable adsorption of As(V) ions onto Fe-IR-120(Na)-DEHPA. The maximum As(V) ions uptake calculated from Langmuir model was 21.8 μg/g.

关键词： DEHPA 浸渍树脂水溶液 Langmuir模型 IR NA 搬运过程绩效评价

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

ANTIBACTERIAL ACTIVITY OF SINGLE AND MIXED AMMONIUM AND PHOSPHONIUM SALTS GRAFTED ON "GEL-TYPE" STYRENE-DIVINYLBENZENE COPOLYMERS

引用

Chinese Journal of Reactive Polymers 2000年第2期9卷 118-128页

作者： Adriana POPA Corneliu-Mircea davidescu Smaranda ILIESCU Gheorghe ILIA Gheorghe DEHELEAN Lavinia MACARIE Radu TRIF Rumanian Academy Institute of Chemistry24 M.Viteazul Str.1900 TimisoaraRoumania. "Politehnica"University Faculty of Industrial Chemistry and Enviromental EngineeringPhysical Chemistry DepartmentBul.V.Parvan 61900 TimisoaraRoumania. Banat University of Agricultural Science and Veterinary Medicine Microbiology DepartmentCalea Aradului 1191900 TimisoaraRoumania

A systematic study on the synthesis and antibacterial activity of the quaternary "onium" salts grafted on an insoluble "gel-type" styrene-7% divinylbenzene copolymer by polymer-analogous reactions is showed. Antibacterial activity of quaternary ammonium and/or phosphonium salts grafted on polymer-supports has been studied against Staphylococcus aureus and Escherichia coli. A wide variety of "onium" salts bound to macromolecular supports with different quaternary groups and different quaternary chain length substituents were examined. The antibacterial activity of mixed "onium" salts increases as a consequence of the association of ammonium and phosphonium salts grafted on the same polymeric support.

关键词： Antibacterial activity Staphylococcus aureus Escherichia coli Quaternary ammonium and/or phosphonium salts grafted on polymer-supports`

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

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

在线全文

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

在线全文

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：