Removal and ecological impact of sulfamethoxazole and N-acetyl sulfamethoxazole in mesocosmic wetlands dominated by submerged plants: Plant tolerance, microbial response, and nitrogen transformation

Sulfamethoxazole (SMX) and its human metabolite N-acetylsulfamethoxazole (N-SMX) are frequently detected in aquatic environments, posing potential threats to freshwater ecosystem health. Constructed wetlands are pivotal for wastewater treatment, with plant species serving as key determinants of poll...

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Bibliographic Details
Published in:The Science of the total environment 2024-12, Vol.958, p.178034, Article 178034
Main Authors: Mu, Xiaoying, Chen, Congli, Fan, Qinya, Zhang, Weihang, Liu, Fei, Guo, Jiaxun, Qi, Weixiao, Liu, Huijuan
Format: Article
Language:English
Subjects:
Constructed wetlands
N-acetylsulfamethoxazole
Nitrogen reduction
Submerged plant-biofilm
Sulfamethoxazole
Online Access:Get full text
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Summary:Sulfamethoxazole (SMX) and its human metabolite N-acetylsulfamethoxazole (N-SMX) are frequently detected in aquatic environments, posing potential threats to freshwater ecosystem health. Constructed wetlands are pivotal for wastewater treatment, with plant species serving as key determinants of pollutant removal efficiency. In this study, wetlands dominated by three submerged plants (Myriophyllum verticillatum, Vallisneria spiralis, Hydrilla verticillata) were respectively constructed to investigate the removal of SMX and N-SMX, and the impact on wetland ecology regarding plant tolerance, microbial response, and nitrogen transformation. Results showed that wetlands removed N-SMX (82.3–99.8 %) more effectively than SMX (54.3–80.2 %), with the wetland dominated by Myriophyllum verticillatum showing the highest removal efficiency. However, high concentrations (5 mg/L) of SMX and N-SMX significantly reduced NH4+-N and TN removal (p 
ISSN:0048-9697
1879-1026
1879-1026
DOI:10.1016/j.scitotenv.2024.178034