Green and scalable preparation of hierarchical porous ZIF-8 nanomaterials for enhanced methyl blue adsorption from water

IF 3.4 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

International Journal of Environmental Science and Technology Pub Date : 2026-09-29 DOI:10.1007/s13762-026-07476-8

H. S. Albalawi, M. A. Albalawi

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引用次数: 0

Abstract

This work reports the eco-friendly, room-temperature CO₂-bubbling synthesis of hierarchical absorbent ZIF-8 (HP-ZIF-8) and its application in removing methylene blue (MB) from water. Structural analyses (XRD, FTIR, SEM, TEM, TGA, and N₂ sorption) confirmed the creation of a high-porosity framework by interconnected micro–mesopores, enabling efficient dye capture. The material removed up to 98.7% of MB at pH 7 and 25 °C, with adsorption well described by the Langmuir equation model and a capacity of 66.67 mg g⁻¹ at 55 °C. Kinetic evaluation followed pseudo-second-order behavior, consistent with chemisorption, while thermodynamic results revealed a spontaneous and endothermic process. Moreover, HP-ZIF-8 retained 88% of its adsorption capacity after five reuse cycles, underscoring its stability. These findings highlight HP-ZIF-8 synthesized via a sustainable CO₂-bubbling strategy as a robust and green adsorbent for dye-laden wastewater treatment.

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绿色和可扩展制备分级多孔ZIF-8纳米材料以增强甲基蓝对水中的吸附

本工作报道了环保的室温co2鼓泡合成分级吸收剂ZIF-8 （HP-ZIF-8）及其在去除水中亚甲基蓝（MB）中的应用。结构分析（XRD、FTIR、SEM、TEM、TGA和N2吸附）证实了通过相互连接的微介孔形成的高孔隙度框架，实现了高效的染料捕获。该材料在pH为7、温度为25℃时对MB的去除率高达98.7%，Langmuir方程模型很好地描述了该材料在55℃时的吸附量为66.67 mg g−1。动力学评价为准二阶行为，符合化学吸附，而热力学结果显示为自发吸热过程。HP-ZIF-8在重复使用5次后仍保持了88%的吸附容量，稳定性较好。这些发现突出了HP-ZIF-8通过可持续的co2鼓泡策略合成，作为一种强大的绿色吸附剂用于染料废水处理。

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来源期刊

International Journal of Environmental Science and Technology 环境科学-环境科学

CiteScore

5.60

自引率

6.50%

发文量

806

审稿时长

10.8 months

期刊介绍： International Journal of Environmental Science and Technology (IJEST) is an international scholarly refereed research journal which aims to promote the theory and practice of environmental science and technology, innovation, engineering and management. A broad outline of the journal''s scope includes: peer reviewed original research articles, case and technical reports, reviews and analyses papers, short communications and notes to the editor, in interdisciplinary information on the practice and status of research in environmental science and technology, both natural and man made. The main aspects of research areas include, but are not exclusive to; environmental chemistry and biology, environments pollution control and abatement technology, transport and fate of pollutants in the environment, concentrations and dispersion of wastes in air, water, and soil, point and non-point sources pollution, heavy metals and organic compounds in the environment, atmospheric pollutants and trace gases, solid and hazardous waste management; soil biodegradation and bioremediation of contaminated sites; environmental impact assessment, industrial ecology, ecological and human risk assessment; improved energy management and auditing efficiency and environmental standards and criteria.