CH4 control and nitrogen removal from constructed wetlands by plant combination

被引：1

作者：

Zhang X. ^{[1
]}

Wang R. ^{[1
]}

Wang H. ^{[2
]}

Xu Z. ^{[1
]}

Feng C. ^{[1
]}

Zhao F. ^{[1
]}

机构：

[1] School of Water Conservancy and Environment, University of Jinan, Jinan

[2] Inspur General Software Co., Ltd, Jinan

来源：

Chemosphere | 2024年 / 355卷

基金：

中国国家自然科学基金;

关键词：

CH[!sub]4[!/sub] control; Functional genes; Microbial community; Nitrogen removal; Plant combination;

D O I：

10.1016/j.chemosphere.2024.141898

中图分类号：

学科分类号：

摘要：

Global warming trend is accelerating. This study proposes a green and economical methane (CH4) control strategy by plant combination in constructed wetlands (CWs). In this study, a single planting of Acorus calamus L. hybrid constructed wetland (HCW-A) and a mixed planting of Acorus calamus L. and Eichhornia crassipes (Mart.) Solms hybrid constructed wetland (HCW-EA) were constructed. The differences in nitrogen removal performance and CH4 emissions between HCW-A and HCW-EA were compared and analyzed. The findings indicated that HCW-EA demonstrated significant improvements over HCW-A, with NH4 +-N and TN removal rates increasing by 21.61% and 16.38% respectively, and CH4 emissions decreased by 43.36%. The microbiological analysis results showed that plant combination promoted the enrichment of Proteobacteria, Alphaproteobacteria and Bacillus. More nitrifying bacteria carrying nxrA genes and denitrifying bacteria carrying nirK genes accelerated the nitrogen transformation process. In addition, the absolute abundance ratio of pmoA/mcrA increased, reducing the release of CH4. © 2024 Elsevier Ltd

引用

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