Sulfonamides removal under different redox conditions and microbial response to sulfonamides stress during riverbank filtration

Sulfonamides removal under different redox conditions and microbial response to sulfonamides stress during riverbank filtration: A laboratory column study

Bai, Ying (Nanjing University)
Ruan, Xiaohong (Nanjing University)
Wang, F. (TU Delft Sanitary Engineering)
Garnier, Antoine (The National Engineering School of Rennes)
van der Hoek, J.P. (TU Delft Sanitary Engineering)

2019

Riverbank filtration (RBF) as a barrier of pathogenic microorganisms and organic micropollutants recently has been proven capable of removing sulfonamides. However, the study about the effect of redox conditions on biodegradation of common and persistent sulfonamides in RBF is limited and the response of microbial communities to sulfonamides stress during RBF is unknown. In this study, two column set-ups (with residence time 5 days and 11 days respectively), simulating different redox conditions of riverbank filtration systems, were operated for seven months to investigate 1) the long-term effect of redox conditions on ng∙L−1 level sulfonamides (sulfapyridine, sulfadiazine, sulfamethoxazole, sulfamethazine, sulfaquinoxaline) removal, and 2) the microbial community evolution represented by the phylogenetic and metabolic function shift under non-lethal selective pressures of sulfonamides. The results showed that sulfonamides were more degradable under anoxic conditions than oxic and suboxic conditions. In the sulfonamides stressed community, the phylogenetic diversity increased slightly. Relative abundance of an intrinsic sulfonamides resistant bacteria Bacillus spp. increased, suggesting that sulfonamide resistance developed in specific bacteria under sulfonamides contamination pressure in RBF systems. At the same time, an activated transport function in the stressed microbial community was noticed. The predicted relative abundance of gene folP, which encodes dihydropteroate synthase, also increased significantly, indicating a detoxification mechanism and sulfonamides resistance potential under non-lethal selective pressures of sulfonamides in RBF systems.

Riverbank filtration
Sulfonamides
Redox condition
Microbial community structure
Metagenome prediction

http://resolver.tudelft.nl/uuid:926c5022-2ac7-4b0d-9218-618b3ab89ea2

https://doi.org/10.1016/j.chemosphere.2018.12.167

2019-06-26

0045-6535

Chemosphere, 220, 668-677

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

journal article

© 2019 Ying Bai, Xiaohong Ruan, F. Wang, Antoine Garnier, J.P. van der Hoek