Synthesis of a high surface area porous poly(ortho amino-phenol) resin for effective adsorption of rare earth elements Nd(III) and Er (III) ions

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers Pub Date : 2025-04-29 DOI:10.1016/j.jtice.2025.106153

Fatimah Algarni , Emad A. Elshehy , Muhammad Kashif , Waleed A. El-Said

{"title":"Synthesis of a high surface area porous poly(ortho amino-phenol) resin for effective adsorption of rare earth elements Nd(III) and Er (III) ions","authors":"Fatimah Algarni , Emad A. Elshehy , Muhammad Kashif , Waleed A. El-Said","doi":"10.1016/j.jtice.2025.106153","DOIUrl":null,"url":null,"abstract":"<div><h3>Background</h3><div>The growing need for rare earth elements (REEs) has raised significant concerns regarding the sustainability of their supply. The industrial REEs separation from ores often results in significant environmental pollution and high production costs. So, recovering REEs from different wastes has become essential for reducing costs and minimizing environmental impact.</div></div><div><h3>Methods</h3><div>This study investigates the sorption behavior of Nd(III) and Er(III) ions on a synthesized poly-o(amino-phenol) (POAP) resin, focusing on pH effects, kinetics, isotherms, and selectivity. The resin was characterized using FTIR, XPS, SEM, TEM, STEM-EDX, elemental mapping, and N₂ adsorption/desorption.</div></div><div><h3>Significant Findings</h3><div>The N<sub>2</sub> data exhibited a high surface area and microporous structure (pore diameter: 1.92 nm). Uptake capacities reached 47.7 mg <em>g</em><sup>−1</sup> and 38 mg <em>g</em><sup>−1</sup> for Er(III) and Nd(III), respectively, with data fitting the pseudo-first-order kinetic model and Freundlich isotherm at pH 4.8. Solution pH significantly influenced sorption, with protonation inhibiting uptake at low pH and at higher pH enhancing metal complexation, indicating similar binding affinities for both metals, complicating selective separation. Thermodynamics showed the process to be endothermic, spontaneous, and entropy-driven. POAP exhibited slight Er(III) preference in binary systems, but selectivity was insufficient for effective separation.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"173 ","pages":"Article 106153"},"PeriodicalIF":5.5000,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of the Taiwan Institute of Chemical Engineers","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1876107025002068","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}

引用次数: 0

Abstract

Background

The growing need for rare earth elements (REEs) has raised significant concerns regarding the sustainability of their supply. The industrial REEs separation from ores often results in significant environmental pollution and high production costs. So, recovering REEs from different wastes has become essential for reducing costs and minimizing environmental impact.

Methods

This study investigates the sorption behavior of Nd(III) and Er(III) ions on a synthesized poly-o(amino-phenol) (POAP) resin, focusing on pH effects, kinetics, isotherms, and selectivity. The resin was characterized using FTIR, XPS, SEM, TEM, STEM-EDX, elemental mapping, and N₂ adsorption/desorption.

Significant Findings

The N₂ data exhibited a high surface area and microporous structure (pore diameter: 1.92 nm). Uptake capacities reached 47.7 mg g⁻¹ and 38 mg g⁻¹ for Er(III) and Nd(III), respectively, with data fitting the pseudo-first-order kinetic model and Freundlich isotherm at pH 4.8. Solution pH significantly influenced sorption, with protonation inhibiting uptake at low pH and at higher pH enhancing metal complexation, indicating similar binding affinities for both metals, complicating selective separation. Thermodynamics showed the process to be endothermic, spontaneous, and entropy-driven. POAP exhibited slight Er(III) preference in binary systems, but selectivity was insufficient for effective separation.

Abstract Image

查看原文本刊更多论文

高效吸附稀土元素Nd（III）和Er （III）离子的高比表面积多孔聚邻氨基酚树脂的合成

对稀土元素（ree）日益增长的需求引起了对其供应可持续性的重大关注。工业稀土分离往往造成严重的环境污染和高昂的生产成本。因此，从不同的废物中回收稀土对于降低成本和减少对环境的影响至关重要。方法研究了合成的聚o（氨基酚）（POAP）树脂对Nd（III）和Er（III）离子的吸附行为，重点研究了pH效应、动力学、等温线和选择性。采用FTIR、XPS、SEM、TEM、STEM-EDX、元素图谱、N₂吸附/脱附等方法对树脂进行了表征。结果表明：氮气具有较高的比表面积和微孔结构（孔径为1.92 nm）。Er（III）和Nd（III）的吸收能力分别达到47.7 mg g−1和38 mg g−1，数据符合准一级动力学模型和pH为4.8的Freundlich等温线。溶液pH显著影响吸附，低pH下质子化抑制吸收，高pH下增强金属络合，表明两种金属的结合亲和力相似，使选择性分离复杂化。热力学表明这一过程是吸热的、自发的、熵驱动的。POAP在二元体系中表现出轻微的Er（III）偏好，但选择性不足以实现有效分离。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of the Taiwan Institute of Chemical Engineers 工程技术-工程：化工

CiteScore

9.10

自引率

14.00%

发文量

362

审稿时长

35 days

期刊介绍： Journal of the Taiwan Institute of Chemical Engineers (formerly known as Journal of the Chinese Institute of Chemical Engineers) publishes original works, from fundamental principles to practical applications, in the broad field of chemical engineering with special focus on three aspects: Chemical and Biomolecular Science and Technology, Energy and Environmental Science and Technology, and Materials Science and Technology. Authors should choose for their manuscript an appropriate aspect section and a few related classifications when submitting to the journal online.