文献类型：期刊文献

英文题名：Synergistic adsorption-reduction mechanism of magnetic Fe3O4@Ti3AlC2 composites for high-efficiency uranium (VI) remediation in aqueous systems

作者：Wang, Yinhua[1];Huang, Rui[1,2];Wang, Yixing[1];Pan, Yixin[1,2]

机构：[1]Shaoxing Univ, Coll Civil Engn, Shaoxing 312000, Zhejiang, Peoples R China;[2]Key Lab Rock Mech & Geohazards Zhejiang Prov, Shaoxing 312000, Zhejiang, Peoples R China

年份：2025

卷号：176

外文期刊名：JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS

收录：SCI-EXPANDED(收录号：WOS:001541325100002)、、EI(收录号：20253018846000)、Scopus(收录号：2-s2.0-105011407284)、WOS

语种：英文

外文关键词：Titanium aluminum carbide; Wastewater; Uranium(VI); Adsorption; Kinetics

外文摘要：Background: Uranium(VI) contamination poses severe environmental and health risks due to its high mobility and toxicity. Existing remediation strategies face challenges in efficiency and scalability. This study addresses these limitations by developing a magnetic Fe3O4@Ti3AlC2 composite, leveraging synergistic adsorption-reduction mechanisms for effective U(VI) removal. Methods: The composite was synthesized via co-precipitation, integrating Fe3O4 nanoparticles onto Ti3AlC2 substrates. Batch adsorption experiments evaluated U(VI) removal efficiency under varied pH, temperature, and coexisting ion conditions. Material characterization employed SEM, TEM, XRD, FTIR, XPS, and BET analysis to elucidate structural and mechanistic properties. Significant Findings: Optimal adsorption occurred at pH 7 with a maximum capacity of 151.70 mg/g, driven by chemisorption and multilayer adsorption on heterogeneous surfaces, as confirmed by pseudo-second-order kinetics and Freundlich isotherm models. Mechanistic analyses revealed U(VI) immobilization through redox reactions (partial reduction to U(IV)) and complexation with surface functional groups (e.g., Ti-O, C = O). The composite demonstrated rapid magnetic separation, recyclability, and compatibility with natural groundwater pH, eliminating the need for rigorous pH adjustment. Notably, coexisting Cu2+ enhanced adsorption, while Pb2+ and organic macromolecules inhibited performance. These findings establish Fe3O4@Ti3AlC2 as a sustainable, high-efficiency adsorbent for uranium remediation, offering scalable applications in wastewater treatment and environmental restoration.