Iron nanoparticles-chitosan/reduced graphene oxide (mCS@rGO) beads as a multifunctional material for the adsorption and degradation of phenol from aqueous media

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Surfaces and Interfaces Pub Date : 2025-09-24 DOI:10.1016/j.surfin.2025.107744

Marina Barbosa de Farias , Patrícia Prediger , Melissa Gurgel Adeodato Vieira

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Abstract

A magnetic multifunctional material (mCS@rGO) was developed and used to remove phenol from water through adsorption and Fenton-based degradation processes. The adsorption performance of the mCS@rGO beads towards phenol was evaluated through kinetic, equilibrium, and thermodynamic analyses. An adsorption capacity of 50.1 mg/g and a removal rate of 55 % were obtained. The kinetic data showed that multiple adsorption mechanisms and rate-limiting steps may be involved. The equilibrium data were most accurately described by the Sips isothermal model. Thermodynamic parameters indicated that the process is spontaneous and endothermic. The beads were also used as catalysts in Fenton-type processes. The influence of process variables on degradation performance was assessed through a factorial design, which revealed that the optimal conditions were an H₂O₂:phenol molar ratio of 25:1, a catalyst dosage of 1.5 g/L, and a solution pH of 4.95. Then, a heterogeneous Fenton-type process, a heterogeneous sono-Fenton-type process, and a combination of adsorption and oxidation processes were evaluated, yielding removals of 63 %, 83 %, and 91 %, respectively. The best performance, observed for the adsorption/heterogeneous sono-Fenton-type system, confirmed the synergistic effect of the combined techniques. Characterization analyses revealed no significant changes in the composition of mCS@rGO after the processes. Phenol removal was suggested to occur in two sequential stages: adsorption onto the beads via hydrogen bonding and π–π interactions, followed by oxidative reactions.

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铁纳米颗粒-壳聚糖/还原氧化石墨烯（mCS@rGO）微珠作为吸附和降解水中苯酚的多功能材料

开发了一种磁性多功能材料（mCS@rGO），并通过吸附和fenton降解工艺去除水中的苯酚。通过动力学、平衡和热力学分析，评价了mCS@rGO微球对苯酚的吸附性能。吸附量为50.1 mg/g，去除率为55%。动力学数据表明，可能涉及多种吸附机制和限速步骤。Sips等温模型最准确地描述了平衡数据。热力学参数表明该过程是自发的吸热过程。这些微球也被用作fenton型工艺的催化剂。通过析因设计考察工艺参数对降解性能的影响，得出H2O2：苯酚摩尔比为25:1、催化剂用量为1.5 g/L、溶液pH为4.95的最佳工艺条件。然后，对非均相fenton型工艺、非均相sono- fenton型工艺以及吸附和氧化组合工艺进行了评价，其去除率分别为63%、83%和91%。吸附/非均相sono- fenton型体系的性能最好，证实了两种技术的协同作用。表征分析显示，加工后mCS@rGO的组成没有显著变化。苯酚的去除过程分为两个阶段：通过氢键和π -π相互作用吸附在微珠上，然后是氧化反应。

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来源期刊

Surfaces and Interfaces Chemistry-General Chemistry

CiteScore

8.50

自引率

6.50%

发文量

753

审稿时长

35 days

期刊介绍： The aim of the journal is to provide a respectful outlet for ''sound science'' papers in all research areas on surfaces and interfaces. We define sound science papers as papers that describe new and well-executed research, but that do not necessarily provide brand new insights or are merely a description of research results. Surfaces and Interfaces publishes research papers in all fields of surface science which may not always find the right home on first submission to our Elsevier sister journals (Applied Surface, Surface and Coatings Technology, Thin Solid Films)