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用于从水溶液中高效去除砷的氧化石墨烯-碳纳米管-磁铁矿纳米复合材料

Graphene oxide-carbon nanotube-magnetite nanocomposites for efficient arsenic removal from aqueous solutions.

作者信息

Tan Pham The, Thu Hien Le Thi, Anh Nguyen Ngoc, Minh Phan Ngoc, Van Trinh Pham, Van Hao Nguyen

机构信息

Hung Yen University of Technology and Education Khoai Chau Distr. Hung Yen Province Vietnam.

Institute of Materials Science, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Str., Cau Giay Distr. Hanoi Vietnam

出版信息

RSC Adv. 2025 Jun 19;15(26):20792-20809. doi: 10.1039/d5ra02925b. eCollection 2025 Jun 16.

DOI:10.1039/d5ra02925b
PMID:40538744
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12178118/
Abstract

In this study, graphene oxide-carbon nanotube-magnetite (GO/CNT/FeO) nanocomposites were synthesized a co-precipitation method for wastewater treatment. The obtained results indicated that FeO nanoparticles exhibited a spherical-shaped morphology, with an average diameter of around 20 nm, and decorated the surface of GO and CNTs. The adsorption data fitted well with the Langmuir isothermal model, exhibiting a coefficient of > 0.998, and the adsorption kinetics followed the pseudo-second-order model. This indicated that the adsorption mechanism involved surface complexation between adsorbents and As(iii) ions rather than electrostatic interactions. The As(iii) removal results also indicated that the GO/CNT/FeO nanocomposites exhibited a significantly enhanced adsorption capacity ( ) of 128.5 mg g compared with those of CNT/FeO (106.3 mg g) and GO/FeO (113.9 mg g) composites. In addition, GO/CNT/FeO nanocomposites exhibited the highest adsorption efficiency of up to 99.18%. The coexisting ions, such as phosphate and sulfate, showed a negligible influence on the adsorption of As(iii) in solutions. The obtained results demonstrated that the GO/CNT/FeO nanocomposites could be promising candidates for the removal of arsenic and other contaminants from aqueous solutions.

摘要

在本研究中，采用共沉淀法合成了氧化石墨烯-碳纳米管-磁铁矿（GO/CNT/FeO）纳米复合材料用于废水处理。所得结果表明，FeO纳米颗粒呈现球形形态，平均直径约为20 nm，并修饰在GO和CNT的表面。吸附数据与Langmuir等温模型拟合良好，系数>0.998，吸附动力学遵循准二级模型。这表明吸附机制涉及吸附剂与As(iii)离子之间的表面络合作用，而非静电相互作用。As(iii)的去除结果还表明，与CNT/FeO（106.3 mg/g）和GO/FeO（113.9 mg/g）复合材料相比，GO/CNT/FeO纳米复合材料表现出显著增强的吸附容量（128.5 mg/g）。此外，GO/CNT/FeO纳米复合材料表现出高达99.18%的最高吸附效率。共存离子，如磷酸盐和硫酸盐，对溶液中As(iii)的吸附影响可忽略不计。所得结果表明，GO/CNT/FeO纳米复合材料有望成为从水溶液中去除砷和其他污染物的候选材料。

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