Highly Selective Capture of ReO4– by a Conjugated Amine-Based Polymer Synthesized via a One-Pot Strategy

IF 5.2 2区化学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Polymer Materials Pub Date : 2026-10-09 Epub Date: 2026-09-16 DOI:10.1021/acsapm.6c02862

Zhifeng Nie, Hongxing He, Yi Zhang, Xiaodong Zhuang, Xiaoying Li, Ni Yang

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引用次数: 0

Abstract

Given the highly dispersed occurrence of rhenium in the natural environment, it is commonly encountered in conjunction with other minerals and primarily occurs as perrhenate ions (ReO₄^–) in the acidic waste solutions produced by nonferrous metallurgical operations. The advancement of techniques for the efficient, economical, and selective extraction of rhenium from metallurgical waste acids holds significant socio-economic value. In the present study, a functional polymer designated CY-PPZ, characterized by a conjugated amine structure, was synthesized via a one-pot reaction employing cyanuric chloride and piperazine as monomeric precursors, designed for the targeted adsorption of ReO₄^– ions. Experimental investigations revealed that CY-PPZ exhibited superior adsorption performance for ReO₄^– across a broad pH range (2–8), achieving adsorption equilibrium within 480 min and demonstrating a maximum adsorption capacity of 350.92 mg/g. The polymer also displayed remarkable selectivity and resistance to interference from competing ions, as evidenced by a distribution coefficient (K_d) of 14.34 L/g. Notably, in simulated metallurgical waste acid solutions characterized by elevated concentrations of competing anions, specifically with a molar ratio of ReO₄^– to NO₃^–, SO₄^2–, and Cl^– of 1:3000, the removal efficiency of ReO₄^– consistently exceeded 88.52%. Additionally, CY-PPZ exhibited excellent recyclability, retaining a removal efficiency of 90.20% after 8 successive adsorption–desorption cycles. Economic analysis indicated that each gram of CY-PPZ could yield an approximate socio-economic value of $26.866. Mechanistic insights obtained from XPS and DFT calculations confirmed that the primary adsorption mechanisms involved synergistic electrostatic interactions and chemical coordination between CY-PPZ and ReO₄^– ions. In summary, CY-PPZ emerges as a highly promising material for the selective, efficient, and cost-effective extraction of rhenium from metallurgical waste acid streams.

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通过一锅策略合成的共轭胺基聚合物的高选择性捕获ReO4 -

考虑到铼在自然环境中的高度分散，它通常与其他矿物一起出现，主要以过氧化物离子（ReO4 -）的形式出现在有色冶金作业产生的酸性废液中。从冶金废酸中高效、经济、选择性地提取铼的技术的进步具有重要的社会经济价值。本研究以三聚氰胺和哌嗪为单体前驱体，通过一锅反应合成了一种具有共轭胺结构的功能聚合物CY-PPZ，用于靶向吸附ReO4 -离子。实验研究表明，CY-PPZ在较宽的pH范围内（2-8）对ReO4 -表现出优异的吸附性能，在480 min内达到吸附平衡，最大吸附量为350.92 mg/g。聚合物的分布系数（Kd）为14.34L/g，具有良好的选择性和抗竞争离子干扰能力。值得注意的是，在以阴离子竞争浓度升高为特征的模拟冶金废酸溶液中，特别是当ReO4 -与NO3 -、SO42 -和Cl -的摩尔比为1:3000时，ReO4 -的去除率始终超过88.52%。此外，cy - ppz表现出优异的可回收性，在连续8次吸附-解吸循环后，其去除率仍保持在90.20%。经济分析表明，每克CY-PPZ可产生约26.866美元的社会经济价值。XPS和DFT计算证实了CY-PPZ和ReO4 -离子之间的静电协同作用和化学配位是主要的吸附机制。综上所述，CY-PPZ是一种极具前景的材料，可用于从冶金废酸流中选择性、高效、低成本地提取铼。

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来源期刊

ACS Applied Polymer Materials Multiple-

CiteScore

7.20

自引率

6.00%

发文量

810

期刊介绍： ACS Applied Polymer Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics, and biology relevant to applications of polymers. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates fundamental knowledge in the areas of materials, engineering, physics, bioscience, polymer science and chemistry into important polymer applications. The journal is specifically interested in work that addresses relationships among structure, processing, morphology, chemistry, properties, and function as well as work that provide insights into mechanisms critical to the performance of the polymer for applications.