Easily modified polyamine resin: Its synthesis and adsorption performance for perrhenate ion in acidic sulfate media

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-02-10 DOI:10.1016/j.colsurfa.2025.136392

Yu Wang , Chengqiang Hu , Junlian Wang , Guoyong Huang , Fengshan Yu , Lingling Xiao

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引用次数: 0

Abstract

Developing novel extractive resins for Re^7 + (in ReO₄^- form) enrichment and separation that have prospect of practical applications has drawn great attention in recent years. In this study, a kind of highly efficient polyamine-modified resin (marked as Merrifield resins-TEPA-Et) was synthesized by simply modified Merrifield resins with TEPA and bromoethane. This resin was characterized by FT-IR, SEM, EA, XPS and BET. Its adsorption behaviors for Re⁷⁺ at different oscillating time, initial Re⁷⁺ concentration and acidity were investigated. Its selectivity and saturation capacity for Re⁷⁺ were evaluated. The Re⁷⁺ adsorption kinetics, isotherm, thermodynamics and mechanism were studied. The desorption behavior of the adsorbed Re⁷⁺ was also explored. Merrifield resins-TEPA-Et has as high adsorption saturation capacity as 422.47 mg/g, and excellent selectivity for Re⁷⁺ with separation factors β_Re/Mo, β_Re/Cu, β_Re/Ni and β_Re/Mn reaching to 7, 48, 74 and 102, respectively, and hardly adsorbs the coexisting metal ions Co²⁺, Zn²⁺, Al³⁺ and Fe³⁺ at acidity of 0.05 mol/L H₂SO₄. The Re⁷⁺ adsorption Merrifield resins-TEPA-Et fit pseudo-first order kinetic model and Freundlich adsorption isotherm model, and is endothermic. The adsorbed Re⁷⁺ can be easily and completely desorbed by 0.3 mol/L NH₄SCN solution. The adsorption process includes protonation of the amine groups and then interaction with ReO₄^- via electrostatic attraction.

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.