Efficient Elimination of Inorganic/Organic Pollutants by Fe3O4/biochar@sodium Alginate Gel Beads

IF 3.7 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY Langmuir Pub Date : 2024-10-18 DOI:10.1021/acs.langmuir.4c02070

Xiaonan Li, Jing Li, Xiyu Jia, Nian Liu, Xinrui Gao, Zuoqin Zhou, Wei Yang, Bing Wei, Zheng Yang, Suhua Fan, Hai Wu, Hui Zhang

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Abstract

The magnetic composite gel bead (Fe₃O₄–C@SA GB) adsorbent was prepared by sodium alginate (SA) crosslinking with pitaya peel-derived porous carbons (PPDPCs) and magnetic iron oxide nanoparticles (Fe₃O₄ NPs). The adsorption effects of Fe₃O₄–C@SA GBs on heavy metal ions (HMIs) and 17 β-estradiol (E2) in water are evaluated by classical kinetic models and isotherm models. The pseudo-second-order kinetic model shows that Fe₃O₄–C@SA GBs have maximum adsorption capacities of 9.62, 7.50, and 13.61 mg/g for Cu (II), Cd (II), and Pb (II), respectively. Meanwhile, the highest adsorption performance of the synthesized gel beads to E2 is of ca. 276.3 mg/g. In addition, the Fe₃O₄–C@SA GBs can still maintain a high level of adsorption efficiency after five adsorption cycles, displaying economic efficiency and reusability. Hence, this work provides useful insights into the efficient adsorption elimination of pollutants in sewage and the corresponding adsorption mechanisms.

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用 Fe3O4/生物炭@海藻酸钠凝胶珠高效消除无机/有机污染物

海藻酸钠（SA）与番木瓜皮衍生多孔碳（PPDPCs）和磁性氧化铁纳米颗粒（Fe3O4 NPs）交联制备了磁性复合凝胶珠（Fe3O4-C@SA GB）吸附剂。通过经典动力学模型和等温线模型评估了 Fe3O4-C@SA GBs 对水中重金属离子（HMIs）和 17 β-雌二醇（E2）的吸附效果。伪二阶动力学模型表明，Fe3O4-C@SA GBs 对 Cu (II)、Cd (II) 和 Pb (II) 的最大吸附容量分别为 9.62、7.50 和 13.61 mg/g。同时，合成凝胶珠对 E2 的最高吸附性能约为 276.3 mg/g。此外，Fe3O4-C@SA GBs 在经过五个吸附循环后仍能保持较高的吸附效率，显示出经济效益和可重复使用性。因此，这项工作为高效吸附消除污水中的污染物以及相应的吸附机理提供了有益的启示。

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来源期刊

Langmuir 化学-材料科学：综合

CiteScore

6.50

自引率

10.30%

发文量

1464

审稿时长

2.1 months

期刊介绍： Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).