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首页> 外文期刊>Clean >Metal Ions Extraction from Solid Matrix in Supercritical Carbon Dioxide with DMBP as Chelating Ligand
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Metal Ions Extraction from Solid Matrix in Supercritical Carbon Dioxide with DMBP as Chelating Ligand

机译：以DMBP为螯合物的超临界二氧化碳萃取固体基质中的金属离子。

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摘要

The effects of pressure, temperature, time, and ligand to metal ratio (50:1-200:1) on the extraction efficiency of metal ions with 4,4'-dimethyl-2,2'-bipyridyl (DMBP) as a chelating ligand were systematically investigated in supercritical carbon dioxide (sc-CO_2). Eight metal ions (Mn~(2+), Fe~(3+), Co~(2+), Ni~(2+), Cu~(2+), Zn~(2+), Cd~(2+), and Pb~(2+)) were tested, respectively, to be extracted from solid matrix into sc-CO_2. The best extraction efficiency for Co~(2+) (83.68%) was obtained in the optimized condition (DMBP and perfluoro-1-octanesulfonic acid tetraethylammonium salt as a co-ligand used, 25MPa, 323 K, 20 min, ligand to metal ratio of 200). Extraction from mixed metal ions with DMBP was also achieved and the results showed that selectivity for Co~(2+) ion was notable (98.17%) in the above-mentioned conditions. Finally, the detailed calculation results exhibited that the extraction constants (K_(ex)) of the metal ions increased with the increase of the extraction efficiency in the same extraction system.
机译：压力，温度，时间和配体与金属的比率（50：1-200：1）对以4,4'-二甲基-2,2'-联吡啶（DMBP）螯合的金属离子的萃取效率的影响在超临界二氧化碳（sc-CO_2）中系统地研究了配体。八种金属离子（Mn〜（2 +），Fe〜（3 +），Co〜（2 +），Ni〜（2 +），Cu〜（2 +），Zn〜（2 +），Cd〜（2分别测试+）和Pb〜（2+）），以从固体基质中提取到sc-CO_2中。在最佳条件下（DMBP和全氟-1-辛磺酸四乙基铵盐作为共配体使用），在25MPa，323 K，20 min的条件下，对Co〜（2+）的最佳萃取效率为83.68％。比200）。还用DMBP从混合金属离子中萃取，结果表明，在上述条件下，对Co〜（2+）离子的选择性显着（98.17％）。最后，详细的计算结果表明，在相同的萃取系统中，金属离子的萃取常数（K_（ex））随萃取效率的增加而增加。

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  • 来源
    《Clean》 |2010年第6期|p.543-547|共5页
  • 作者

    Jia Tian; Hai-Jian Yang; Wei Wang; Hakwon Kim;

  • 作者单位

    Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission, Key Laboratory of Materials Science of the State Ethnic Affairs Commission and Ministry of Education, Hubei Province, College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan, R R. China;

    rnKey Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission, Key Laboratory of Materials Science of the State Ethnic Affairs Commission and Ministry of Education, Hubei Province, College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan 430074, P. R. China;

    rnKey Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission, Key Laboratory of Materials Science of the State Ethnic Affairs Commission and Ministry of Education, Hubei Province, College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan, R R. China;

    rnDepartment of Applied Chemistry, Industrial Liaison Research Institute, College of Applied Science, Kyung Hee University, Gyeonggi, Republic of Korea Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission, Key Laboratory of Materials Science of the State Ethnic Affairs Commission and Ministry of Education, Hubei Province, College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan 430074, P. R. China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    4,4'-Dimethyl-2,2'-bipyridyl; extraction constant; metal ions extraction; supercritical CO_2;

    机译：4,4'-二甲基-2,2'-联吡啶;提取常数金属离子提取;超临界CO_2;

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