A floatable and anisotropic composite aerogel for enhanced synergistic adsorption-catalysis of antibiotics in marine aquaculture wastewater

IF 9.8 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination Pub Date : 2025-10-10 DOI:10.1016/j.desal.2025.119504

Xiaoxia Lin , Yongli Chen , Keying Li , Xiyue Han , Xuexia Zhang , Yuqi Li , Hui Zhang

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引用次数: 0

Abstract

The widespread use of antibiotics in marine aquaculture poses a significant threat to the ecological equilibrium and human health. Collaborative adsorption-photocatalysis based on metal organic framework (MOF) catalysts has emerged as an advanced and highly effective strategy for removing antibiotics from aquatic environments. However, the intrinsic limitations of MOF including their low photocatalytic efficiency and susceptibility to structural collapse hinder their widespread practical application. Inspired by the symbiotic relationship between sea anemones and hermit crabs, we prepared a floating, anisotropic MIL-53 (Fe/Co)-graphene oxide/sodium alginate/nanocellulose composite aerogel (FCG/SC) catalyst via graphene oxide (GO) interface regulation and directional freeze-drying technology for efficient degradation of antibiotics in water. Strategic doping of Co elements within Fe-MOF metal nodes constructed defect structures and improved the catalytic performance. The introduction of GO in the hydrothermal reaction not only facilitates the nucleation of Fe/Co metal cations but also regulates the catalyst particle size and suppresses electron-hole recombination, ultimately enhancing photocatalytic efficiency. Furthermore, the directional channel structure of the aerogel shortens the light path, maximizing light absorption on the catalyst surface. The results indicated that the synergistic adsorption-photocatalytic (SAP) degradation of tetracycline hydrochloride (TC-HCl) exhibited superior efficiency compared to the pre-adsorption photocatalysis (PAP) processes. A significant SAP efficiency of 99.32 % was achieved when the MIL-53 (Fe/Co)-graphene oxide loading rate reached 30 wt%. Moreover, FCG/SC exhibited exceptional SAP degradation efficiency of 70.12 % even challenged with aquaculture wastewater containing NH₄Cl, KNO₃, NaNO₂, KH₂PO₄, and glucose. Crucially, the FCG/SC demonstrated exceptional stability and reusability. Five consecutive cycles revealed no substantial damage to the surface structure or catalyst leaching, and the degradation efficiency still can be remained at 96.16 %. This highly efficient and reusable composite aerogel offers a novel approach for the removal of TC-HCl from marine aquaculture wastewater.

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一种可浮性各向异性复合气凝胶增强海洋养殖废水中抗生素的协同吸附催化作用

抗生素在海洋水产养殖中的广泛使用对生态平衡和人类健康构成了重大威胁。基于金属有机框架（MOF）催化剂的协同吸附-光催化已成为一种先进而高效的去除水生环境中抗生素的策略。然而，MOF光催化效率低、易发生结构坍塌等固有的局限性阻碍了其广泛的实际应用。受海葵与寄居蟹共生关系的启发，我们通过氧化石墨烯（GO）界面调控和定向冷冻干燥技术制备了一种漂浮的各向异性MIL-53 (Fe/Co)-氧化石墨烯/海藻酸钠/纳米纤维素复合气凝胶（FCG/SC）催化剂，用于高效降解水中抗生素。在Fe-MOF金属节点中战略性地掺杂Co元素，构建了缺陷结构，提高了催化性能。水热反应中引入GO不仅有利于Fe/Co金属阳离子成核，还能调节催化剂粒径，抑制电子-空穴复合，最终提高光催化效率。此外，气凝胶的定向通道结构缩短了光路，最大限度地提高了催化剂表面的光吸收。结果表明，吸附-光催化（SAP）协同降解盐酸四环素（TC-HCl）的效率优于预吸附光催化（PAP）工艺。当MIL-53 (Fe/Co)-氧化石墨烯负载率达到30 wt%时，SAP效率达到99.32%。此外，FCG/SC对含有NH₄Cl、KNO₃、NaNO₂、KH₂PO₄和葡萄糖的水产养殖废水的SAP降解效率也达到了70.12%。关键是，FCG/SC表现出了出色的稳定性和可重用性。连续5次循环对表面结构和催化剂浸出均无明显破坏，降解效率仍可保持在96.16%。这种高效、可重复使用的复合气凝胶为去除海水养殖废水中的TC-HCl提供了一种新的方法。

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来源期刊

Desalination 工程技术-工程：化工

CiteScore

14.60

自引率

20.20%

发文量

619

审稿时长

41 days

期刊介绍： Desalination is a scholarly journal that focuses on the field of desalination materials, processes, and associated technologies. It encompasses a wide range of disciplines and aims to publish exceptional papers in this area. The journal invites submissions that explicitly revolve around water desalting and its applications to various sources such as seawater, groundwater, and wastewater. It particularly encourages research on diverse desalination methods including thermal, membrane, sorption, and hybrid processes. By providing a platform for innovative studies, Desalination aims to advance the understanding and development of desalination technologies, promoting sustainable solutions for water scarcity challenges.