Advancing Arsenic Removal: Leveraging the Efficiency of Magnetic Graphene Oxide Nanocomposite

IF 3.8 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Water, Air, & Soil Pollution Pub Date : 2025-04-24 DOI:10.1007/s11270-025-08000-3

Jovana Pešić, Malcolm Watson, Jasmina Nikić, Đurđa Kerkez, Jovana Jokić Govedarica, Marija Maletin, Jasmina Agbaba

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Abstract

The widespread contamination of water resources is a global concern. In this study, magnetic graphene oxide (MGO) was prepared from graphene oxide (GO), and both nanomaterials investigated as adsorbents for the removal of arsenic. GO synthesized by a modified Hummer's method was further modified with magnetite nanoparticles to obtain MGO. Subsequent characterization with a variety of techniques confirmed the structural integrity of both types of nanoparticles and the presence of functional groups essential for effective adsorption. Adsorption kinetics experiments on both materials were well modelled by the pseudo-second order and Weber-Morris models, suggesting that both chemisorption and intra-particle diffusion control the adsorption kinetics of As(V) on MGO and GO. The magnetite modification of GO was highly effective in increasing arsenic adsorption capacity, with the Langmuir isotherm model returning a q_max for MGO more than 5 times greater than GO alone. Response surface methodology (RSM) was used to investigate the impact of initial As concentration, pH and the presence of dissolved organic carbon (DOC) on the adsorption of As onto MGO. In addition to the As concentration, the RSM model revealed significant interaction effects between the pH and the other parameters investigated, highlighting the importance of this parameter whilst optimising adsorption processes. Finally, both GO and MGO maintained their integrity across 5 adsorption/desorption cycles, with the high performance of MGO confirming its long-term potential as an environmentally sustainable solution for arsenic removal.

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推进砷去除：利用磁性氧化石墨烯纳米复合材料的效率

水资源的广泛污染是一个全球性问题。本研究以氧化石墨烯（GO）为原料制备了磁性氧化石墨烯（MGO），并研究了这两种纳米材料作为吸附剂去除砷的效果。用改进的Hummer方法合成氧化石墨烯，再用纳米磁铁矿对氧化石墨烯进行改性，得到MGO。随后用各种技术进行表征，证实了两种纳米颗粒的结构完整性和有效吸附所必需的官能团的存在。两种材料在MGO和GO上的吸附动力学实验均通过拟二阶和Weber-Morris模型进行了很好的模拟，表明化学吸附和颗粒内扩散共同控制了As(V)在MGO和GO上的吸附动力学。氧化石墨烯的磁铁矿改性对提高砷的吸附能力非常有效，Langmuir等温线模型对氧化石墨烯的qmax的返回值是单独氧化石墨烯的5倍以上。采用响应面法（RSM）研究了初始As浓度、pH和溶解有机碳（DOC）的存在对MGO吸附As的影响。除了As浓度外，RSM模型还揭示了pH值与所研究的其他参数之间存在显著的相互作用效应，突出了该参数在优化吸附过程中的重要性。最后，GO和MGO在5个吸附/解吸循环中都保持了完整性，MGO的高性能证实了其作为环境可持续除砷解决方案的长期潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Water, Air, & Soil Pollution 环境科学-环境科学

CiteScore

4.50

自引率

6.90%

发文量

448

审稿时长

2.6 months

期刊介绍： Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments. Articles should not be submitted that are of local interest only and do not advance international knowledge in environmental pollution and solutions to pollution. Articles that simply replicate known knowledge or techniques while researching a local pollution problem will normally be rejected without review. Submitted articles must have up-to-date references, employ the correct experimental replication and statistical analysis, where needed and contain a significant contribution to new knowledge. The publishing and editorial team sincerely appreciate your cooperation. Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.