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Environments
Volume 12
Issue 9
10.3390/environments12090300
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Selective Adsorption Performance of a High-Capacity Mesoporous Silica Aerogel for Fluoroquinolones

by
Yifan Zhao
1,2,
Lin Gu
3,
Zhihan Liu
1,
Junyu Zhang
1,3,
Wei Xia
1,3,
Peng Wang
1,
Wenlei Zhai
4,
Guangxin Yang
1,3,*,
Xiaosheng Shen
1,
Chengqi Fan
1 and
Cong Kong
1,*
1
East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China
2
College of Food Science and Engineering, Dalian Ocean University, Dalian 116023, China
3
School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
4
Institute of Quality Standard and Testing Technology, Beijing Academy of Agriculture and Forestry Sciences, No. 9 Middle Road of Shuguanghuayuan, Haidian District, Beijing 100097, China
*
Authors to whom correspondence should be addressed.
Environments 2025, 12(9), 300; https://doi.org/10.3390/environments12090300
Submission received: 5 August 2025 / Revised: 21 August 2025 / Accepted: 26 August 2025 / Published: 28 August 2025
(This article belongs to the Topic New Advances in Adsorptive and Extractive Methods for Pollutant Removal)
Versions Notes

Abstract

Fluoroquinolone antibiotics (FQs) are widely applied in veterinary practice and animal husbandry and frequently persist in organic waste liquids (OWLs), creating substantial environmental and health risks when untreated. A high-capacity mesoporous silica aerogel (SA-60) was produced via a cost-effective sol–gel route from water glass, followed by ambient pressure drying at 60 °C for 6 h. SA-60 exhibited pronounced selectivity, providing a maximum adsorption capacity of 630.18 mg·g−1 for enrofloxacin (ENR) in acetonitrile. Adsorption efficiency was weakly dependent on pH. Mechanistic analysis indicated combined physical and chemical interactions, with intra-particle diffusion governing the overall rate. Thermodynamic evaluation showed a spontaneous and endothermic process for ENR adsorption. Organic solvent type and water content were major determinants of adsorption efficiency. Durable performance was observed, with capacity retention above 80% after five adsorption-desorption cycles. The mesoporous architecture (surface area 249.21 m2·g−1; average pore diameter 10.81 nm) supported the high uptake. These results identify SA-60 as a sustainable adsorbent for removing hazardous FQs from OWLs, offering a simple, energy-efficient approach for the source-level control of antibiotic pollution and improved environmental management.
Keywords: silica aerogel; ambient pressure drying; fluoroquinolones; adsorption; organic waste liquid silica aerogel; ambient pressure drying; fluoroquinolones; adsorption; organic waste liquid

Share and Cite

MDPI and ACS Style

Zhao, Y.; Gu, L.; Liu, Z.; Zhang, J.; Xia, W.; Wang, P.; Zhai, W.; Yang, G.; Shen, X.; Fan, C.; et al. Selective Adsorption Performance of a High-Capacity Mesoporous Silica Aerogel for Fluoroquinolones. Environments 2025, 12, 300. https://doi.org/10.3390/environments12090300

AMA Style

Zhao Y, Gu L, Liu Z, Zhang J, Xia W, Wang P, Zhai W, Yang G, Shen X, Fan C, et al. Selective Adsorption Performance of a High-Capacity Mesoporous Silica Aerogel for Fluoroquinolones. Environments. 2025; 12(9):300. https://doi.org/10.3390/environments12090300

Chicago/Turabian Style

Zhao, Yifan, Lin Gu, Zhihan Liu, Junyu Zhang, Wei Xia, Peng Wang, Wenlei Zhai, Guangxin Yang, Xiaosheng Shen, Chengqi Fan, and et al. 2025. "Selective Adsorption Performance of a High-Capacity Mesoporous Silica Aerogel for Fluoroquinolones" Environments 12, no. 9: 300. https://doi.org/10.3390/environments12090300

APA Style

Zhao, Y., Gu, L., Liu, Z., Zhang, J., Xia, W., Wang, P., Zhai, W., Yang, G., Shen, X., Fan, C., & Kong, C. (2025). Selective Adsorption Performance of a High-Capacity Mesoporous Silica Aerogel for Fluoroquinolones. Environments, 12(9), 300. https://doi.org/10.3390/environments12090300

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