Rapid Separation and Concentration of Anions Using Polymer Complexes

使用聚合物复合物快速分离和浓缩阴离子

• 批准号: 05640680
• 负责人: YUCHI Akio
• 金额: $ 1.22万
• 依托单位: Nagoya Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05640680/
• 关键词: Polymer Comlex; Halide Ions; Separation; Preconcentration; Chelating Polymer; Mixed Ligand Complex; Flow Injection Analysis; ジルコニウム

Zirconium (IV) complexes with hydrophilic chelating polymer, -RZr (OH) _2, adsorbed fluoride ion in an acidic medium, which was desorbed in a weakly alkaline medium. Both reactions proceeded quite rapidly. The adsorption-desorption mechanisms were studied. Adsorption by an ion-exchange mechanism [formation of -RZr(OH) F] is predominant in a strongly acidic medium, whereas fluoride is adsorbed with a counter ion in a weakly acidic medium [formation of -RZr (OH) _2 F・K]. The adsorbed fluoride is released throught the formation of -RZr(OH) _3・K type complex, which regenerates the original polymer complex under the influence of an acid.In a batch system, 10^<-4> mol dm^<-3> F^- was quantitatively adsorbed in the presence of halides, alkali and alkaline earth metal ions. Recovery for F^- less than 10^<-5> mol dm^<-3>, however, was not satisfactory. Using the flow adsorption system, the sufficient recovery was obtained even for 10^<-6> mol dm^<-3> F^-.This preconcentration was applied to flow-injection spectrophotometry of fluoride to increase the tolerance limit of Al almost 10-fold. Similar adsorbents for other halide such as bromide and iodide were also studied.

锆（IV）配合物与亲水螯合聚合物-RZr (OH) _2在酸性介质中吸附氟离子，在弱碱性介质中解吸氟离子。这两种反应都进行得相当迅速。研究了吸附-解吸机理。在强酸性介质中主要通过离子交换机制吸附[-RZr(OH) F的形成]，而在弱酸性介质中则通过反离子吸附[-RZr(OH) _2 F·K的形成]。吸附的氟化物通过形成-RZr(OH) _3·K型配合物释放出来，在酸的作用下再生原有的聚合物配合物。在间歇式体系中，在卤化物、碱和碱土金属离子存在下，定量吸附10^<-4> mol dm^<-3> F^-。然而，对于F^-小于10^<-5> mol dm^<-3>，回收率并不令人满意。采用流动吸附系统，即使10^<-6> mol dm^<-3> F^-也能获得足够的回收率。将该预富集方法应用于氟的流动注射分光光度法，使氟对铝的容忍极限提高了近10倍。对其他卤化物如溴化物和碘化物的吸附剂也进行了类似的研究。

项目成果

A.Yuchi: "Rapid Adsorption and Desorption of Fluoride on Zirconium(IV)Complex with Hydrophilic Chelating Polymer" Chemistry Letters. 1191-1194 (1994)

A.Yuchi：“亲水性螯合聚合物在锆（IV）络合物上快速吸附和解吸氟化物”化学快报。

A.Yuchi: "Determination of Fluoride in the Presence of Tetravalent Metal Ions with an Ion-selective Electrode:Application to Raw Material of Fluoride Glasses" Analyst. 120. 167-170 (1995)

A.Yuchi：“用离子选择电极测定四价金属离子存在下的氟化物：在氟化物玻璃原材料中的应用”分析师。

A.Yuchi et.al.: "Determination of Fuoride in the Presence of Tetravalent Metal Ions with an Ion-selective Electrode : Application to Raw Material of Fluoride Glasses" Analyst. Vol.120. 167-170 (1995)

A.Yuchi 等人：“用离子选择性电极测定四价金属离子存在下的氟化物：在氟化物玻璃原材料中的应用”分析师。

A.Yuchi: "Determination of Fluoride in the Presence of Tetravalent Metal Ions with an Ion-selective Electrode: Application to Raw Material of Fluoride Glasses" Analyst. 120. 167-170 (1995)

A.Yuchi：“用离子选择电极测定四价金属离子存在下的氟化物：在氟化物玻璃原材料中的应用”分析师。

A.Yuchi et.at.: "Rapid Adsorption and Desorption of Fluoride on Zirconium (IV) Complex with Hydrophilic Chelating Polymer" Chem.Lett.1191-1194 (1994)

A.Yuchi 等人：“氟化物在具有亲水性螯合聚合物的锆 (IV) 络合物上的快速吸附和解吸”Chem.Lett.1191-1194 (1994)