Efficient removal of copper ions from wastewater using a novel magnetic ZnO-MnFe2O4 decorated on MWCNTs adsorbent

IF 5.2 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Liquids Pub Date : 2025-09-25 DOI:10.1016/j.molliq.2025.128579

Saeed Zeinali Heris , Hadi Pourpasha , Ahsan Sagheb Asl , Yaghoub Mohammadfam

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引用次数: 0

Abstract

Copper (Cu), though an essential element, can become environmentally hazardous at elevated concentrations. Industrial releases of Cu(II) into water systems may accumulate in living organisms, posing health risks. Nanocomposite-based adsorption represents one of the most effective methods for Cu removal. In the present study the new magnetic nanocomposite, which includes ZnO and MnFe₂O₄ decorated on MWCNTs (MWCNTs&ZnO&MnFe₂O₄), was synthesized to elucidate its capability to adsorb Cu(II) ions from wastewater. This new adsorbent retained a high specific surface area (58.383 m²/g). This characteristic is crucial as it provides ample adsorption sites. Additionally, the ZnO nanoparticles play a vital role in preventing MWCNT agglomeration, which further improves the accessibility of these sites. These analyses indicated that the new magnetic nanocomposite was synthesized as a mesoporous material with a pore size of 13.5 nm and without impurities. The batch adsorption method and response surface methodology (RSM) were used to study adsorption efficiency. The maximum Cu(II) adsorption efficiency of 99.92 % was achieved at a Cu(II) ion concentration of 24.09 mg/L and an adsorbent dosage of 0.97 g/L. The kinetic study indicated the pseudo-second-order (PSO) exhibit a high level of agreement with the experimental data. The Freundlich isotherm (FI) model exhibited the best fit with the experimental data. Thermodynamic analyses revealed that the adsorption (AD) process is spontaneous and endothermic. As the adsorption/desorption process progressed through five stages, the efficiency showed a slight decline, dropping from 99.92 % to 92.12 %. One advantage is that the lowest concentration of MWCNTs&ZnO&MnFe₂O₄ (CZM) adsorbent can effectively purify water contaminated with Cu(II) ions over multiple cycles.

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新型磁性ZnO-MnFe2O4修饰MWCNTs吸附剂对废水中铜离子的高效去除

铜（Cu）虽然是一种必需元素，但浓度过高会对环境造成危害。工业排放的铜（II）进入水系统可能在生物体中积累，构成健康风险。纳米复合材料基吸附是最有效的除铜方法之一。在本研究中，合成了一种新型磁性纳米复合材料，包括ZnO和MnFe2O4修饰在MWCNTs上（MWCNTs&ZnO&MnFe2O4），以阐明其吸附废水中Cu（II）离子的能力。这种新型吸附剂保持了较高的比表面积（58.383 m2/g）。这个特性是至关重要的，因为它提供了充足的吸附位点。此外，ZnO纳米颗粒在防止MWCNT团聚方面起着至关重要的作用，这进一步提高了这些位点的可及性。这些分析表明，新型磁性纳米复合材料是一种孔径为13.5 nm且不含杂质的介孔材料。采用间歇吸附法和响应面法（RSM）研究了吸附效率。当Cu（II）离子浓度为24.09 mg/L，吸附剂用量为0.97 g/L时，Cu（II）的最大吸附效率为99.92%。动力学研究表明，伪二阶（PSO）与实验数据具有较高的一致性。Freundlich等温线（FI）模型与实验数据拟合最好。热力学分析表明，吸附过程是自发的吸热过程。随着吸附/解吸过程的进行，效率略有下降，从99.92%下降到92.12%。优点之一是MWCNTs&；ZnO&MnFe2O4 （CZM）吸附剂的最低浓度可以在多次循环中有效地净化被Cu（II）离子污染的水。

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来源期刊

Journal of Molecular Liquids 化学-物理：原子、分子和化学物理

CiteScore

10.30

自引率

16.70%

发文量

2597

审稿时长

78 days

期刊介绍： The journal includes papers in the following areas: – Simple organic liquids and mixtures – Ionic liquids – Surfactant solutions (including micelles and vesicles) and liquid interfaces – Colloidal solutions and nanoparticles – Thermotropic and lyotropic liquid crystals – Ferrofluids – Water, aqueous solutions and other hydrogen-bonded liquids – Lubricants, polymer solutions and melts – Molten metals and salts – Phase transitions and critical phenomena in liquids and confined fluids – Self assembly in complex liquids.– Biomolecules in solution The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include: – Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.) – Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.) – Light scattering (Rayleigh, Brillouin, PCS, etc.) – Dielectric relaxation – X-ray and neutron scattering and diffraction. Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.