Potential of Salvinia biloba Raddi for the remediation of water polluted with ciprofloxacin: Removal, physiological response, and root microbial community

• Published in: Journal of hazardous materials 2024-12, Vol.480, p.136038, Article 136038
• Main Authors: Luo, Zhangxiong, Qin, Meng, Guo, Zicong, Li, Xuxin, Zhou, Ting, Zeng, Zhuotong, Zhou, Chengyun, Song, Biao
• Format: Article
• Language: English
• Subjects: Anti-Bacterial Agents - pharmacology; Antibiotics; Biodegradation, Environmental; Ciprofloxacin - pharmacology; Degradation pathway; Floating plant; Phytoremediation; Plant Roots - drug effects; Plant Roots - metabolism; Toxicity; Water Pollutants, Chemical - metabolism; Water Pollutants, Chemical - toxicity; Water Purification - methods
• ISSN: 0304-3894; 1873-3336; 1873-3336
• DOI: 10.1016/j.jhazmat.2024.136038

This paper investigated the removal amount of Ciprofloxacin (CIP) by Salvinia biloba Raddi (S. biloba) under various conditions, the physiological response under different CIP concentrations, the influence of CIP on the root microbial community structure of S. biloba, the possible metabolic pathways and removal mechanism. The results showed that under 4 mg/L CIP, the removal rate of CIP was 98 %. Under different CIP concentration conditions, low CIP concentration promoted the growth of S. biloba, while high CIP inhibited the growth of S. biloba and S. biloba was exposed to different degrees of oxidative stress. CIP affected root microbial community diversity and changed microbial community structure. Five possible degradation pathways were proposed through the determination of intermediate metabolites. According to mass balance calculations, biodegradation was the most critical degradation pathway. This study demonstrated the potential use of S. biloba for treating CIP-contaminated water and provided insights into the mechanisms of plant-based antibiotic degradation. [Display omitted] •Toxicity of ciprofloxacin (CIP) to Salvinia biloba Raddi (S. biloba) was studied.•The CIP removal rate of S. biloba was 98 % within 5 days under optimal conditions.•Biodegradation played a major role in the degradation pathway of CIP.•The effect of CIP on root endophyte community of S. biloba was studied.