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用于铅离子螯合的磺化聚苯乙烯树脂负载氧化钨的研制。

Development of sulfonated polystyrene resin-supported tungsten oxide for Pb ion sequestration.

作者信息

Khaliq Kashmala, Raza Anjum Mohsin Ali, Shahida Shabnam, Akhtar Ramzan, Khan Adil, Shafiq Munib Ahmad, Rafiq Iqra, Rehan Muhammad, Qureshi Rashid Nazir, Iqbal Sajid, Yun Jong-Il, Saifullah Muhammad

机构信息

Department of Chemistry, University of Poonch Rawalakot AJK Pakistan

Chemistry Division, Pakistan Institute of Nuclear Science and Technology (PINSTECH) Nilore 45650 Islamabad Pakistan

出版信息

RSC Adv. 2025 May 1;15(18):14158-14169. doi: 10.1039/d5ra01017a. eCollection 2025 Apr 28.

DOI:10.1039/d5ra01017a
PMID:40313317
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12044525/
Abstract

A sulfonated polystyrene resin-supported tungsten oxide (SO-PSWO) was synthesized and evaluated for its efficiency in removing lead (Pb) from aqueous solutions. Morphology, phase purity, structural properties, thermal stability, and elemental composition of SO-PSWO, are evaluated using SEM, XRD, FTIR, TGA, and CHNS analyzers. The ICP-OES technique was utilized for quantitative measurements of the Pb ions. The influence of key parameters such as pH, adsorbent dose, contact time, metal ion concentration, temperature, and interference of competing ions on Pb removal is systematically investigated. Under optimum conditions (pH 3.5-5.5), SO-PSWO achieved a maximum Pb removal efficiency of 99.7% within one hour and demonstrated an exceptional adsorption capacity of 386 mg g, as described by the Langmuir isotherm model. Kinetic analysis revealed a pseudo-second-order mechanism, highlighting chemisorption as the predominant process. Thermodynamic studies indicated an exothermic and spontaneous adsorption behavior. With its easy synthesis, cost-effectiveness, rapid kinetics, high adsorption capacity, and superior efficiency, SO-PSWO emerges as a promising material for the remediation of Pb contamination in water treatment applications.

摘要

合成了一种磺化聚苯乙烯树脂负载氧化钨（SO-PSWO），并对其从水溶液中去除铅（Pb）的效率进行了评估。使用扫描电子显微镜（SEM）、X射线衍射仪（XRD）、傅里叶变换红外光谱仪（FTIR）、热重分析仪（TGA）和元素分析仪（CHNS）对SO-PSWO的形貌、相纯度、结构性质、热稳定性和元素组成进行了评估。电感耦合等离子体发射光谱法（ICP-OES）用于定量测定铅离子。系统研究了pH值、吸附剂用量、接触时间、金属离子浓度、温度和竞争离子干扰等关键参数对铅去除的影响。在最佳条件（pH 3.5-5.5）下，SO-PSWO在一小时内实现了99.7%的最大铅去除效率，并如朗缪尔等温线模型所述，表现出386 mg/g的优异吸附容量。动力学分析揭示了伪二级动力学机制，突出了化学吸附是主要过程。热力学研究表明吸附行为是放热和自发的。SO-PSWO具有合成简便、成本效益高、动力学快、吸附容量高和效率优异等特点，是水处理应用中修复铅污染的一种有前景的材料。

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