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用于从水溶液中吸附有毒元素的新型碳化壳聚糖-氧化锌-磁铁矿纳米复合材料

Novel Nanocomposite of Carbonized Chitosan-Zinc Oxide-Magnetite for Adsorption of Toxic Elements from Aqueous Solutions.

作者信息

Ali Dalia A, Ismail Ganna G, Osman Ahmed I, Alreshaidan Salwa B, Al-Fatesh Ahmed S

机构信息

Department of Chemical Engineering, The British University in Egypt, El-Sherouk City 11837, Egypt.

School of Chemistry and Chemical Engineering, Queen's University Belfast, David Keir Building, Stranmillis Road, Belfast, Northern Ireland BT9 5AG, U.K.

出版信息

ACS Omega. 2024 Nov 20;9(48):47567-47584. doi: 10.1021/acsomega.4c06541. eCollection 2024 Dec 3.

DOI:10.1021/acsomega.4c06541
PMID:39651102
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11618426/
Abstract

Herein, a novel nanocomposite (carbonized chitosan-zinc oxide-magnetite, CCZF) was developed to effectively remove toxic elements in water remediation. Combining the high adsorption capacities of chitosan with the magnetic properties of magnetite and the chemical stability of zinc oxide, the combination of these unique properties makes it an efficient and versatile material that offers a sustainable solution for water purification. The (CCZF) nanocomposite was synthesized through the coprecipitation method and characterized using various techniques, including scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET) analysis, X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and zeta potential analysis. The results showed impressive maximum adsorption capacities of 891.34 mg/g for Ni, 1269.35 mg/g for Co, and 1502.67 mg/g for Cu, fitting well with a modified Langmuir isotherm model. The adsorption process was spontaneous and endothermic, characterized by low positive enthalpy (Δ) values ranging from 10.95 to 34.9 kJ/mol, indicative of the physical adsorption mechanism. Additionally, the nanocomposite demonstrated good reusability over multiple adsorption and desorption cycles. This research highlights the potential of the (CCZF) nanocomposite as a highly efficient, reusable adsorbent for the removal of toxic elements from aqueous solutions, contributing significantly to environmental remediation efforts and pollution control.

摘要

在此，开发了一种新型纳米复合材料（碳化壳聚糖-氧化锌-磁铁矿，CCZF），用于在水修复中有效去除有毒元素。壳聚糖的高吸附能力与磁铁矿的磁性以及氧化锌的化学稳定性相结合，这些独特性能的组合使其成为一种高效且通用的材料，为水净化提供了可持续的解决方案。通过共沉淀法合成了（CCZF）纳米复合材料，并使用各种技术对其进行了表征，包括扫描电子显微镜（SEM）、透射电子显微镜（TEM）、布鲁诺尔-埃米特-泰勒（BET）分析、X射线衍射（XRD）、傅里叶变换红外（FTIR）光谱和zeta电位分析。结果显示，对镍的最大吸附容量高达891.34 mg/g，对钴为1269.35 mg/g，对铜为1502.67 mg/g，与修正的朗缪尔等温线模型拟合良好。吸附过程是自发的且吸热的，其特征在于低的正焓（Δ）值，范围为10.95至34.9 kJ/mol，表明是物理吸附机制。此外，该纳米复合材料在多个吸附和解吸循环中表现出良好的可重复使用性。这项研究突出了（CCZF）纳米复合材料作为一种高效、可重复使用的吸附剂用于从水溶液中去除有毒元素的潜力，对环境修复工作和污染控制做出了重大贡献。

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