Efficient thiacalix[4]arenes for the extraction and separation of Au(III),Pd(II)and Pt(IV)metal ions from acidic media incorporated in membranes and solid phases

Claudia Fontas; Enriqueta Antico; Francis Vocanson

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Efficient thiacalix[4]arenes for the extraction and separation of Au(III),Pd(II)and Pt(IV)metal ions from acidic media incorporated in membranes and solid phases

机译：高效硫杂杯[4]芳烃可从膜和固相中结合的酸性介质中萃取和分离Au（III），Pd（II）和Pt（IV）金属离子

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The complexation of noble metal chloro complexes with thiacalix[4]arene derivatives bearing or not bearing functional groups was studied by liquid-liquid extraction.Among the four tested thiacalixarenes dissolved in chloroform,it was found that the derivative bearing amide groups(macrocycle 1)effectively extracted gold,palladium and platinum from chloride aqueous media via an ion-exchange mechanism,and its affinity was ranked according to Au>Pd>Pt.Moreover,the thiacalix[4]arene(macrocycle 4)selectively extracted palladium.In all cases,a solution of 0.5 M thiourea in 1M HCl effectively eluted the extracted metals.Based on these results,different membrane systems(supported liquid membranes and polymer plasticized membranes)were designed for the selective transport of Au(III)and Pd(II).A new solid phase extraction(SPE)support was also prepared by adsorption of macrocycle 1 or 4 onto commercially available supports.It was found that the extraction ability of these supports towards noble metals was markedly enhanced,showing higher affinity for gold(III)and palladium(II)due to the presence of thiacalixarenes.

机译：通过液-液萃取研究了贵金属氯配合物与带有或不带有官能团的硫杂杯[4]芳烃衍生物的络合物。在四种测试的硫杂杯芳烃溶解于氯仿中的过程中，发现带有酰胺基的衍生物（大环1）通过离子交换机制有效地从氯化物水溶液中提取了金，钯和铂，并根据Au> Pd> Pt对其亲和力进行了排序。此外，硫杂杯[4]芳烃（大环4）选择性地提取了钯。因此，在1M HCl中的0.5 M硫脲溶液可有效洗脱所萃取的金属。基于这些结果，设计了不同的膜系统（支持的液膜和聚合物增塑膜）来选择性运输Au（III）和Pd（II）。还通过将大环1或4吸附到市售载体上制备了一种新的固相萃取（SPE）载体，发现这些载体对贵金属的萃取能力tals显着增强，由于存在噻唑烷芳烃，因此对金（III）和钯（II）的亲和力更高。

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《Separation and Purification Technology》 |2007年第3期|共7页
作者
Claudia Fontas; Enriqueta Antico; Francis Vocanson;
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正文语种 eng
中图分类分离过程;
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Thiacalixarene; Gold; Palladium; Platinum; Membrane; Solid phase extraction;

机译：硫杂杯芳烃;金;钯;铂;膜;固相萃取;

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1. Efficient thiacalix[4]arenes for the extraction and separation of Au(III),Pd(II)and Pt(IV)metal ions from acidic media incorporated in membranes and solid phases [J] . Claudia Fontas, Enriqueta Antico, Francis Vocanson Separation and Purification Technology . 2007,第3期

机译：高效硫杂杯[4]芳烃可从膜和固相中结合的酸性介质中萃取和分离Au（III），Pd（II）和Pt（IV）金属离子
2. Selective thiacalix[4]arene bearing three amide groups as ionophore of binary Pd(II) and Au(III) extraction by a supported liquid membrane system [J] . Asma Zaghbani, Rafik Tayeb, Mahmoud Dhahbi Separation and Purification Technology . 2007,第2期

机译：负载的液膜系统萃取带有三个酰胺基的选择性噻唑杯[4]芳烃，作为二元Pd（II）和Au（III）的离子载体
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Efficient thiacalix[4]arenes for the extraction and separation of Au(III),Pd(II)and Pt(IV)metal ions from acidic media incorporated in membranes and solid phases

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