Improvement of the regenerability and surface electronegativity of rectorite via magnetic modification

IF 5.2 2区化学 Q2 CHEMISTRY, PHYSICAL Journal of Molecular Liquids Pub Date : 2025-06-01 Epub Date: 2025-03-10 DOI:10.1016/j.molliq.2025.127321

Dan Su , Jingyi Huang , Ge Zhang , Jing Gao , Zhipan Wen , Yingru Wang

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Abstract

In this study, the magnetic modification of rectorite was conducted to enhance its regenerability and surface electronegativity. When using the raw rectorite, the removal rate of ciprofloxacin was 78 % and the recovery rate was only 26 % after six regeneration cycles. However, with magnetized modified rectorite (M-REC), the removal rate of ciprofloxacin was 97 % and the recovery rate exceeded 75 %. The magnetic properties, easy magnetic separation and enhanced surface electronegativity of M-REC were confirmed through SEM, TEM, VSM, XRD, BET and XPS characterization. After six regeneration recycles, the basic skeleton structure of M-REC remained largely unchanged, indicating that has excellent stability. Additionally, the adsorption kinetics and thermodynamics of M-REC were investigated, and the Langmuir model accurately described the adsorption isotherm. The adsorption kinetics data fit the pseudo-second order models. The adsorption rate was determined by the number of available adsorption sites on the M-REC surface, and the removal process was primarily driven by chemisorption. Therefore, M-REC is an environmentally friendly adsorption material with potential applications in environmental remediation.

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磁改性提高累托石的可再生性和表面电负性

本研究对累托石进行了磁性改性，以提高其可再生性和表面电负性。使用原料累托石再生6次后，环丙沙星的去除率为78%，回收率仅为26%。磁化改性累托石（M-REC）对环丙沙星的去除率可达97%，回收率超过75%。通过SEM、TEM、VSM、XRD、BET和XPS表征，证实了M-REC的磁性能、易磁分离和表面电负性增强。经过6次再生循环后，M-REC的基本骨架结构基本保持不变，具有良好的稳定性。此外，对M-REC的吸附动力学和热力学进行了研究，Langmuir模型准确地描述了吸附等温线。吸附动力学数据符合准二级模型。吸附速率由M-REC表面可用吸附位点的数量决定，去除过程主要由化学吸附驱动。因此，M-REC是一种环境友好型吸附材料，在环境修复中具有潜在的应用前景。

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麦克林

FeCl3·6H2O

麦克林

FeCl3·6H2O

阿拉丁

ciprofloxacin

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.