2,6-双(4-甲氧基苯甲酰基)二氨基吡啶在溶剂萃取和聚合物膜分离中从水溶液中回收 Au(III)、Ag(I)、Pd(II)和 Pt(II)离子的应用。

The Application of 2,6-Bis(4-Methoxybenzoyl)-Diaminopyridine in Solvent Extraction and Polymer Membrane Separation for the Recovery of Au(III), Ag(I), Pd(II) and Pt(II) Ions from Aqueous Solutions.

机构信息

Faculty of Chemical Technology and Engineering, UTP University of Science and Technology, 3 Seminaryjna Street, PL 85326 Bydgoszcz, Poland.

Faculty of Chemistry, Adam Mickiewicz University in Poznań, 8 Uniwersytetu Poznańskiego Street, PL 61712 Poznań, Poland.

出版信息

Int J Mol Sci. 2021 Aug 24;22(17):9123. doi: 10.3390/ijms22179123.

DOI:10.3390/ijms22179123

PMID:34502032

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8431065/

Abstract

The work describes the results of the first application of 2,6-bis(4-methoxybenzoyl)-diaminopyridine () for the recovery of noble metal ions (Au(III), Ag(I), Pd(II), Pt(II)) from aqueous solutions using two different separation processes: dynamic (classic solvent extraction) and static (polymer membranes). The stability constants of the complexes formed by the L with noble metal ions were determined using the spectrophotometry method. The results of the performed experiments clearly show that 2,6-bis(4-methoxybenzoyl)-diaminopyridine is an excellent extractant, as the recovery was over 99% for all studied noble metal ions. The efficiency of 2,6-bis(4-methoxybenzoyl)-diaminopyridine as a carrier in polymer membranes after 24 h of sorption was lower; the percentage of metal ions removal from the solutions (%R) decreased in following order: Ag(I) (94.89%) > Au(III) (63.46%) > Pt(II) (38.99%) > Pd(II) (23.82%). The results of the desorption processes carried out showed that the highest percentage of recovery was observed for gold and silver ions (over 96%) after 48 h. The results presented in this study indicate the potential practical applicability of 2,6-bis(4-methoxybenzoyl)-diaminopyridine in the solvent extraction and polymer membrane separation of noble metal ions from aqueous solutions (e.g., obtained as a result of WEEE leaching or industrial wastewater).

摘要

本文描述了 2,6-双(4-甲氧基苯甲酰基)-二氨基吡啶 () 在两种不同分离过程中（动态（经典溶剂萃取）和静态（聚合物膜））从水溶液中回收贵金属离子（Au(III)、Ag(I)、Pd(II)、Pt(II)）的首次应用结果。使用分光光度法测定了 L 与贵金属离子形成的配合物的稳定常数。进行的实验结果清楚地表明，2,6-双(4-甲氧基苯甲酰基)-二氨基吡啶是一种极好的萃取剂，因为所有研究的贵金属离子的回收率均超过 99%。在吸附 24 小时后，2,6-双(4-甲氧基苯甲酰基)-二氨基吡啶作为聚合物膜中的载体的效率较低；从溶液中去除金属离子的百分比（%R）按以下顺序降低：Ag(I)（94.89%）>Au(III)（63.46%）>Pt(II)（38.99%）>Pd(II)（23.82%）。进行的解吸过程的结果表明，在 48 小时后，金和银离子的回收率最高（超过 96%）。本研究的结果表明，2,6-双(4-甲氧基苯甲酰基)-二氨基吡啶在从水溶液中溶剂萃取和聚合物膜分离贵金属离子（例如，从 WEEE 浸出或工业废水中获得）方面具有潜在的实际应用前景。