Eco-Friendly Synthesis of Silver-Cellulose Nanocomposite Adsorbent from Agricultural Residues for Binary Dye System Remediation.

IF 4.9 3区工程技术 Q1 POLYMER SCIENCE

Polymers Pub Date : 2025-09-22 DOI:10.3390/polym17182555

Doaa S Al-Raimi, Reem M Alghanmi, Ghalia S Aljeddani, Ragaa A Hamouda

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引用次数: 0

Abstract

This work reports a one-step, green synthesis of silver-micro cellulose nanocomposite (Ag@Ce NCs) using Azadirachta indica A. Juss leaf extract to load micro-cellulose isolated from peanut shells with silver nanoparticles, followed by comprehensive physicochemical characterization (FTIR, TEM, EDX-SEM, zeta potential, and XRD). The composite has pH_PZC ≈ 5.0 and was tested for simultaneous removal of methylene blue (MB) and safranin O (SO) under batch conditions across various pH levels, doses, contact times, initial concentrations, ionic strengths, and temperatures. The high removal efficiencies observed at pH 10 for MB and 6.0 for SO. The adsorption reached the maximum at 45 min before partially declining, indicating reversible binding on saturated surfaces. Isotherm study favored the Langmuir model, with similar affinities (K_L ≈ 0.106, and 0.110 L/mg) and monolayer capacities of 17.99 mg/g for MB and 14.90 mg/g for SO, suggesting non-selective competition on uniform sites. Kinetic data fitted the pseudo-second-order model, while thermodynamic analysis indicated mainly exothermic and physisorption interactions. Higher ionic strength reduced removal efficiency (at 1.0 M NaCl, %RE ≈ 33-48%), highlighting salt sensitivity typical of electrostatic attraction. The adsorbent maintained about 90% of its initial performance after five adsorption-desorption cycles in 0.1 M H₂SO₄, indicating excellent reusability. Overall, Ag@Ce NCs provide an inexpensive, eco-friendly, and reuseable platform for treating binary mixtures of cationic dyes.

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农用废渣合成银-纤维素纳米复合吸附剂修复二元染料系统的研究。

本工作报道了一种一步绿色合成银-微纤维素纳米复合材料（Ag@Ce NCs），使用印楝叶提取物将从花生壳中分离的微纤维素装载银纳米颗粒，然后进行全面的物理化学表征（FTIR， TEM, EDX-SEM， zeta电位和XRD）。该复合材料pHPZC≈5.0，在不同pH水平、剂量、接触时间、初始浓度、离子强度和温度的批处理条件下，对亚甲基蓝（MB）和红花素O （SO）的同时去除进行了测试。在pH为10和6.0时，对MB和SO的去除率较高。吸附在45 min达到最大值，然后部分下降，表明在饱和表面上的可逆结合。等温线研究支持Langmuir模型，其亲和度相似（KL≈0.106和0.110 L/mg）， MB和SO的单分子容量分别为17.99 mg/g和14.90 mg/g，表明在均匀位点上存在非选择性竞争。动力学数据符合拟二阶模型，而热力学分析主要表明放热和物理吸附相互作用。较高的离子强度降低了去除效率（1.0 M NaCl, %RE≈33-48%），突出了静电吸引的典型盐敏感性。在0.1 M H2SO4中进行5次吸附-解吸循环后，吸附剂保持了90%左右的初始性能，具有良好的重复使用性能。总体而言，Ag@Ce NCs为处理阳离子染料的二元混合物提供了廉价，环保和可重复使用的平台。

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来源期刊

Polymers POLYMER SCIENCE-

CiteScore

8.00

自引率

16.00%

发文量

4697

审稿时长

1.3 months

期刊介绍： Polymers (ISSN 2073-4360) is an international, open access journal of polymer science. It publishes research papers, short communications and review papers. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Polymers provides an interdisciplinary forum for publishing papers which advance the fields of (i) polymerization methods, (ii) theory, simulation, and modeling, (iii) understanding of new physical phenomena, (iv) advances in characterization techniques, and (v) harnessing of self-assembly and biological strategies for producing complex multifunctional structures.