Efficient Adsorption of Dye Pollutant by Anchoring Zr-MOF@GO Composite Matrix Microspheres: Performance and Mechanism Insights

IF 3 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Water, Air, & Soil Pollution Pub Date : 2025-05-24 DOI:10.1007/s11270-025-08139-z

Qianhui Ou, Yan Xiong, Li Chen, Deyong He, Chuxiang Zhou, Lan Wang

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引用次数: 0

Abstract

The nanocomposite materials are highly promising candidates for adsorption applications in dyed wastewater due to their distinctive structural properties. In this work, the nanocomposite hybrids of UiO-66@GO were first synthesized by specifically anchoring Zr-based metal organic framework (MOF) of UiO-66 onto graphene oxide (GO) nanolayer through solvothermal method. Then the composite matrix microspheres (CMMs) of UiO-66@GO were subsequently prepared by embedding the obtained UiO-66@GO nanocomposite into sodium alginate (SA) microspheres through self-assembly cross-linking process. Finally, the prepared UiO-66@GO CMMs were applied for the adsorption of organic dye pollutant and showed efficient water purification performance. As a result, the UiO-66@GO CMMs exhibited selective cationic dye adsorption for Rhodamine B (RhB⁺). The experimental results revealed that the adsorption kinetics followed by the pseudo-second-order (PSD) model with rate constant k₂ = 0.95 × 10^–3 g mg⁻¹ min⁻¹, and the thermodynamics followed by the Langmuir model with adsorption capacity of 345.66 mg mg⁻¹. Notably, the UiO-66@GO CMMs demonstrated excellent adsorption removal of a significant removal efficiency of 98% towards 10 ppm Rh-B and a rapid adsorption response time of ~ 5 min. Meanwhile, the UiO-66@GO CMMs maintained long-term stability with adsorption efficiency > 95% over 30 days and effective reuse with resorption efficiency > 90% using DMF-H₂O as eluent. In this study, SA has served as a porous supporting matrix to immobilize UIO-66@GO nanoparticles, having mitigated issues of aggregation and leaching common to nanoscale adsorbents while improving reusability. The synergistic effect between UIO-66 and GO has further enhanced pollutant adsorption capacity, demonstrating significant potential for dye wastewater treatment applications.

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锚定型复合基质微球对染料污染物的高效吸附：性能和机理研究

纳米复合材料由于其独特的结构特性，在染料废水的吸附中具有很大的应用前景。本文首次采用溶剂热法将uuo -66的zr基金属有机骨架（MOF）特异性锚定在氧化石墨烯（GO）纳米层上，合成了UiO-66@GO纳米复合材料。将获得的UiO-66@GO纳米复合材料通过自组装交联工艺包埋在海藻酸钠微球中，制备UiO-66@GO复合基质微球（cmm）。最后，将制备的UiO-66@GO cmm用于吸附有机染料污染物，并表现出良好的净水性能。结果表明，UiO-66@GO cmm对罗丹明B （RhB+）具有选择性阳离子染料吸附。实验结果表明，吸附动力学符合速率常数k2 = 0.95 × 10-3 g mg−1 min−1的伪二阶（PSD）模型，热力学符合吸附量为345.66 mg mg−1的Langmuir模型。值得注意的是，UiO-66@GO CMMs对10 ppm的Rh-B表现出优异的吸附去除效果，去除效率为98%，吸附响应时间为~ 5 min。同时，UiO-66@GO CMMs在30天内保持长期稳定性，吸附效率为95%，并且在使用DMF-H₂O作为洗脱液时有效重复使用，再吸收效率为90%。在这项研究中，SA作为多孔支撑基质固定UIO-66@GO纳米颗粒，减轻了纳米级吸附剂常见的聚集和浸出问题，同时提高了可重用性。UIO-66与氧化石墨烯之间的协同作用进一步增强了污染物的吸附能力，在染料废水处理中具有重要的应用潜力。

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.