Plant and microbial communities responded to copper and/or tetracyclines in mycorrhizal enhanced vertical flow constructed wetlands microcosms with Canna indica L

• Published in: Journal of hazardous materials 2023-06, Vol.451, p.131114-131114, Article 131114
• Main Authors: Xu, Zhouying, Huang, Jun, Chu, Zhenya, Meng, Fake, Liu, Jianjun, Li, Kaiguo, Chen, Xi, Jiang, Yinghe, Ban, Yihui
• Format: Article
• Language: English
• Subjects: Anti-Bacterial Agents - pharmacology; Arbuscular mycorrhizal fungi; Bacteria; Constructed wetlands; Copper; Copper - pharmacology; Environmental Pollutants; Microbial community structure; Microbiota; Mycorrhizae; Plant Roots; Tetracycline; Tetracycline - pharmacology; Tetracyclines; Wetlands
• ISSN: 0304-3894; 1873-3336
• DOI: 10.1016/j.jhazmat.2023.131114

Arbuscular mycorrhizal fungi (AMF) play a significant role in pollutants removal in constructed wetlands (CWs). However, the purification effects of AMF on combined copper (Cu) and tetracycline (TC) pollution in CWs remains unknown. This study investigated the growth, physiological characteristics and AMF colonization of Canna indica L. living in vertical flow CWs (VFCWs) treated for Cu and/or TC pollution, the purification effects of AMF enhanced VFCWs on Cu and TC, and the microbial community structures. The results showed that (1) Cu and TC inhibited plant growth and decreased AMF colonization; (2) the removal rates of TC and Cu by VFCWs were 99.13–99.80% and 93.17–99.64%, respectively; (3) the growth, Cu and TC uptakes of C. indica and Cu removal rates were enhanced by AMF inoculation; (4) TC and Cu stresses reduced and AMF inoculation increased bacterial operational taxonomic units (OTUs) in the VFCWs, Proteobacteria, Bacteroidetes, Firmicutes and Acidobacteria were the dominant bacteria, and AMF inoculation decreased the relative abundance of Novosphingobium and Cupriavidus. Therefore, AMF could enhance the pollutants purification in VFCWs by promoting plant growth and altering the microbial community structures. [Display omitted] •Cu and TC inhibited plant growth and decreased AMF colonization.•AMF-enhanced VFCWs could efficiently treat wastewater containing Cu and/or TC.•TC could inhibit the removal of Cu by VFCWs.•5 mg/L and 50 mg/L Cu could promote and inhibit TC removal, respectively.•AMF inoculation increased the diversity of microbial communities.