期刊
CHEMOSPHERE
卷 308, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2022.136522
关键词
Antibiotics; Brackish aquaculture effluent; Visible-light photocatalysis; Antimicrobial resistance
资金
- FEDER through CENTRO 2020
- National funds through FCT [IF/00314/2015]
- National funds through FCT Fundacao para a Ciencia e a Tecnologia, I.P.
- CESAM by FCT/MCTES through national funds [UIDP/50017/2020+UIDB/50017/2020+ LA/P/0094/2020]
This study successfully achieved the photocatalytic degradation of antibiotic oxolinic acid (OXA) under solar radiation by incorporating carbon quantum dots (CQDs) into titanium dioxide (TiO2). Among the thirteen materials tested, CQDs produced with citric acid and incorporated into TiO2 at 4% (w/w) showed the best performance, reducing the half-life time (t1/2) of OXA by 91%, 79%, and 85% in different matrices.
Antibiotics, such as oxolinic acid (OXA), in aquaculture effluents contribute to the dissemination of antimicrobial resistance, which makes it urgent to develop efficient and sustainable processes for their removal. Aiming a photocatalytic degradation under solar radiation, different carbon quantum dots (CQDs) were produced in this work through a bottom-up hydrothermal methodology and incorporated into TiO2 by a simple calcination method. A total of thirteen materials were synthesized and tested for OXA photocatalytic removal from synthetic and real matrices. Among them, CQDs produced with citric acid and incorporated into TiO2 at 4% (w/w) (TiO2/ CQDs-CA 4% (w/w)) were the most efficient photocatalysts, providing an OXA half-life time (t1/2) decrease of 91%, 79% and 85% in phosphate buffer solution (PBS), synthetic sea salts (SSS) and brackish aquaculture effluent (BAE), respectively. Therefore, the herein synthesized TiO2/CQDs-CA 4% (w/w) composites have shown to be promising materials for a sustainable solar-driven removal of antibiotics from aquaculture effluents.
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