Carboxylated chitosan-phthalate/ZrO2 nanocomposite for removal of methylene blue dye: Characterization and adsorption modeling via response surface methodology

IF 4 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Structure Pub Date : 2025-04-15 DOI:10.1016/j.molstruc.2025.142386

Ahmed Saud Abdulhameed , Rima Heider Al Omari , Mohammad K. Younes , Sameer Algburi

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引用次数: 0

Abstract

Herein, phthalic anhydride was employed to carboxylate the chitosan polymer modified with metal oxide nanoparticles (zirconium dioxide, nano ZrO₂, NZ) to obtain efficient adsorbent of carboxylated chitosan-phthalic anhydride/ZrO₂ biocomposite (CTS-PHT/NZ) for the removal of methylene blue (MB) dye. The properties of CTS-PHT/NZ were investigated via several techniques, i.e., FTIR, BET, CHNO, FESEM-EDX, and XRD. Response surface methodology was applied for modeling the adsorption parameters, including the dosage of CTS-PHT/NZ (ranging from 0.02 to 0.08 g), the time (10 to 110 min), and the pH (ranging from 4 to 10). The results of adsorption isotherms indicated that the Freundlich model provided the best fit for the MB adsorption. In contrast, the kinetic outcomes demonstrated that both pseudo-second-order and pseudo-first-order models adequately characterized the MB adsorption. The adsorption capability of CTS-PHT/NZ is 240.1 mg/g. The MB uptake on the CTS-PHT/NZ ascribes to several interactions, including electrostatic, H-bond interactions, π-π, and n-π stacking. The newly developed CTS-PHT/NZ adsorbent represents a significant advancement in the field of dyeing wastewater remediation, offering high promise for achieving exceptional efficiency in cationic dye removal.

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羧化壳聚糖邻苯二甲酸酯/ZrO2纳米复合材料去除亚甲基蓝染料：表征和响应面法吸附建模

本文采用邻苯二酸酐对金属氧化物纳米粒子（二氧化锆、纳米ZrO2、NZ）修饰的壳聚糖聚合物进行羧化处理，得到羧化壳聚糖-邻苯二酸酐/ZrO2生物复合材料（CTS-PHT/NZ）对亚甲基蓝（MB）染料的高效吸附剂。通过FTIR、BET、CHNO、FESEM-EDX、XRD等技术对CTS-PHT/NZ的性能进行了表征。采用响应面法对CTS-PHT/NZ的投加量（0.02 ~ 0.08 g）、作用时间（10 ~ 110 min）、pH（4 ~ 10）等吸附参数进行建模。吸附等温线结果表明，Freundlich模型最适合MB吸附。相反，动力学结果表明，伪二阶和伪一阶模型都能充分表征MB的吸附。CTS-PHT/NZ的吸附量为240.1 mg/g。CTS-PHT/NZ上的MB吸收归因于几种相互作用，包括静电作用、氢键相互作用、π-π和n-π堆积。新开发的CTS-PHT/NZ吸附剂代表了印染废水处理领域的重大进步，为实现优异的阳离子染料去除效率提供了很大的希望。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Molecular Structure 化学-物理化学

CiteScore

7.10

自引率

15.80%

发文量

2384

审稿时长

45 days

期刊介绍： The Journal of Molecular Structure is dedicated to the publication of full-length articles and review papers, providing important new structural information on all types of chemical species including: • Stable and unstable molecules in all types of environments (vapour, molecular beam, liquid, solution, liquid crystal, solid state, matrix-isolated, surface-absorbed etc.) • Chemical intermediates • Molecules in excited states • Biological molecules • Polymers. The methods used may include any combination of spectroscopic and non-spectroscopic techniques, for example: • Infrared spectroscopy (mid, far, near) • Raman spectroscopy and non-linear Raman methods (CARS, etc.) • Electronic absorption spectroscopy • Optical rotatory dispersion and circular dichroism • Fluorescence and phosphorescence techniques • Electron spectroscopies (PES, XPS), EXAFS, etc. • Microwave spectroscopy • Electron diffraction • NMR and ESR spectroscopies • Mössbauer spectroscopy • X-ray crystallography • Charge Density Analyses • Computational Studies (supplementing experimental methods) We encourage publications combining theoretical and experimental approaches. The structural insights gained by the studies should be correlated with the properties, activity and/ or reactivity of the molecule under investigation and the relevance of this molecule and its implications should be discussed.