Survey of a heteropoly acid-based organic-inorganic magnetic hybrid for effective removal of heavy metal ions from wastewater

IF 4.4 3区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Inorganic Chemistry Communications Pub Date : 2025-03-31 DOI:10.1016/j.inoche.2025.114446

Zeinab Karim Beigi , Arash Larki , Elahe Nasiri

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Abstract

Heavy metal contamination in wastewater is a severe threat to both human health and the environment. In response to this challenge, a novel nano-magnetic heteropoly acid-based organic–inorganic hybrid adsorbent, CF@[Cu₂(nic)(bpy)₂]₂[PTA], was developed for the efficient removal of multiple heavy metal ions. This synergistic adsorbent consists of copper-containing Keggin-type polyoxometalate-based hybrid immobilized on the surface of cobalt ferrite. It features highly electronegative surfaces enriched with oxo-functional groups and magnetic properties, as well as a large surface area. Characterization of the synergistic material was performed using various techniques, including FT-IR, FESEM-EDX, TEM, XRD, VSM, and TGA. The experimental results revealed that the optimal conditions for maximum metal ion removal were achieved at pH 6.5, with a 40 mg dosage of adsorbent, an initial ions concentration of 5.0 mg L⁻¹, and an equilibrium time of 30 min. The CF@[Cu₂(nic)(bpy)₂]₂[PTA] nanoadsorbent exhibited maximum adsorption capacities ranging from 20.5 to 158.7 mg g⁻¹ for the target ions. Kinetic and isotherm modeling showed that metal ions uptake followed a Langmuir isotherm model and a pseudo-second-order kinetic model, with negative ΔG° values indicating a spontaneous adsorption process. Overall, the CF@[Cu₂(nic)(bpy)₂]₂[PTA] nanoadsorbent demonstrates great potential for heavy metal ions removal from wastewater, making it a promising material for cleaner wastewater treatment strategies.

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废水中的重金属污染严重威胁着人类健康和环境。为了应对这一挑战，我们开发了一种新型纳米磁性杂多酸基有机-无机混合吸附剂 CF@[Cu2(nic)(py)2]2[PTA]，用于高效去除多种重金属离子。这种协同吸附剂由固定在钴铁氧体表面的含铜 Keggin 型聚氧化金属盐基杂化物组成。它具有富含氧化官能团的高电负性表面和磁性，以及较大的比表面积。研究人员采用多种技术对这种协同材料进行了表征，包括傅立叶变换红外光谱（FT-IR）、场发射电子显微镜（FESEM-EDX）、电子显微镜（TEM）、X射线衍射（XRD）、可见分光光度计（VSM）和热重分析（TGA）。实验结果表明，在 pH 值为 6.5、吸附剂用量为 40 毫克、初始离子浓度为 5.0 毫克/升、平衡时间为 30 分钟的条件下，金属离子去除率最高。CF@[Cu2(nic)(py)2]2[PTA]纳米吸附剂对目标离子的最大吸附容量为 20.5 至 158.7 mg g-1。动力学和等温线模型显示，金属离子的吸附遵循 Langmuir 等温线模型和伪二阶动力学模型，负 ΔG° 值表明吸附过程是自发的。总之，CF@[Cu2(nic)(py)2]2[PTA]纳米吸附剂在去除废水中的重金属离子方面表现出巨大的潜力，使其成为清洁废水处理策略的一种有前途的材料。

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来源期刊

Inorganic Chemistry Communications 化学-无机化学与核化学

CiteScore

5.50

自引率

7.90%

发文量

1013

审稿时长

53 days

期刊介绍： Launched in January 1998, Inorganic Chemistry Communications is an international journal dedicated to the rapid publication of short communications in the major areas of inorganic, organometallic and supramolecular chemistry. Topics include synthetic and reaction chemistry, kinetics and mechanisms of reactions, bioinorganic chemistry, photochemistry and the use of metal and organometallic compounds in stoichiometric and catalytic synthesis or organic compounds.