Revealing the size effect mechanisms of micro(nano)plastics on nitrogen removal performance of constructed wetland

Micro(nano)plastics (MPs) in aquatic environments can disrupt wastewater treatment, particularly nitrogen removal in constructed wetlands (CWs). However, their broader effects on microbial and plant nitrogen metabolism remain unclear. This study investigated the effects of different-sized MPs (4 mm,...

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Bibliographic Details
Published in:Journal of hazardous materials 2024-12, Vol.480, p.136409, Article 136409
Main Authors: Zhao, Yanhui, Hu, Zhen, Hao, Zeyu, Xie, Huijun, Liu, Daoxing, Yan, Peihao, Xu, Han, Wu, Haiming, Zhang, Jian
Format: Article
Language:English
Subjects:
Bacteria - genetics
Bacteria - metabolism
Biodegradation, Environmental
Constructed wetlands
CW microbial communities
CW plants
Denitrification
Micro(nano)plastics
Nitrification
Nitrogen - metabolism
Nitrogen transformation
Plants - metabolism
Waste Disposal, Fluid - methods
Wastewater
Water Pollutants, Chemical - metabolism
Wetlands
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Summary:Micro(nano)plastics (MPs) in aquatic environments can disrupt wastewater treatment, particularly nitrogen removal in constructed wetlands (CWs). However, their broader effects on microbial and plant nitrogen metabolism remain unclear. This study investigated the effects of different-sized MPs (4 mm, 100 µm, and 100 nm) on nitrogen transformation in CWs. Results revealed that 4 mm- and 100 µm-MPs did not significantly affect total nitrogen (TN) removal, although 100 µm-MPs significantly increased leaf antioxidant enzyme activities and reduced plant uptake of nitrogen by 12.95 % (p 
ISSN:0304-3894
1873-3336
1873-3336
DOI:10.1016/j.jhazmat.2024.136409