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IL 功能化 MgAl-LDH 作为从水溶液中回收 Pd 的新型高效吸附剂。

IL-Functionalized MgAl-LDH as New Efficient Adsorbent for Pd Recovery from Aqueous Solutions.

机构信息

Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University Timisoara, Blv. Vasile Parvan No. 6, 300223 Timisoara, Romania.

出版信息

Int J Mol Sci. 2022 Aug 14;23(16):9107. doi: 10.3390/ijms23169107.

DOI:10.3390/ijms23169107
PMID:36012371
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9409223/
Abstract

Palladium is a noble metal of the platinum group metals (PGMs) with a high value and major industrial applications. Due to the scarce palladium resources, researchers' attention is currently focused on Pd ions recovery from secondary sources. Regarding the recovery process from aqueous solutions, many methods were studied, amongst which adsorption process gained a special attention due to its clear advantages. Moreover, the efficiency and the selectivity of an adsorbent material can be further improved by functionalization of various solid supports. In this context, the present work aims at the synthesis and characterization of MgAl-LDH and its functionalization with ionic liquid (IL) (Methyltrialkylammonium chloride) to obtain adsorbent materials with high efficiency in Pd removal from aqueous solutions. The maximum adsorption capacity developed by MgAl-LDH is 142.9 mg Pd., and depending on the functionalization method used (sonication and co-synthesis, respectively) the maximum adsorption capacity increases considerably, q-MgAl IL-US = 227.3 mg/g and q-MgAl IL-COS = 277.8 mg/g.

摘要

钯是铂族金属（PGM）中的一种贵金属，具有很高的价值和主要的工业应用。由于钯资源稀缺，研究人员目前专注于从二次资源中回收钯离子。关于从水溶液中回收的过程，已经研究了许多方法，其中吸附法由于其明显的优势而受到特别关注。此外，通过各种固体载体的功能化，可以进一步提高吸附剂材料的效率和选择性。在这种情况下，本工作旨在合成和表征 MgAl-LDH 及其与离子液体（IL）（甲基三烷基氯化铵）的功能化，以获得从水溶液中去除钯的高效吸附剂材料。MgAl-LDH 表现出的最大吸附容量为 142.9mg Pd.，并且根据使用的功能化方法（超声和共合成），最大吸附容量显著增加，q-MgAl IL-US = 227.3mg/g 和 q-MgAl IL-COS = 277.8mg/g。

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