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Reassessing the greenhouse effect of biogenic carbon emissions in constructed wetlands.
Hu, Liping; Li, Ziqian; Kong, Lingwei; Wei, Jun; Chang, Junjun; Shi, Wenqing.
Affiliation
  • Hu L; Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technologies, Jiangsu Key Laboratory of Atmospheric Environmental Monitoring & Pollution Control, School of Environmental Science & Engineering, Nanjing University of Information Science & Technology, Nanjin
  • Li Z; Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technologies, Jiangsu Key Laboratory of Atmospheric Environmental Monitoring & Pollution Control, School of Environmental Science & Engineering, Nanjing University of Information Science & Technology, Nanjin
  • Kong L; Key Laboratory of Coastal Environmental and Resources Research of Zhejiang Province, School of Engineering, Westlake University, Hangzhou 320024, China.
  • Wei J; Power China Huadong Engineering Corporation Limited, Hangzhou 311122, China.
  • Chang J; School of Ecology and Environmental Science, Yunnan University, Kunming, 650500, China.
  • Shi W; Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technologies, Jiangsu Key Laboratory of Atmospheric Environmental Monitoring & Pollution Control, School of Environmental Science & Engineering, Nanjing University of Information Science & Technology, Nanjin
J Environ Manage ; 354: 120263, 2024 Mar.
Article in En | MEDLINE | ID: mdl-38387360
ABSTRACT
Biogenic carbon emissions, including carbon dioxide (CO2) and methane (CH4), have emerged as a major concern during organic pollutant degradation within constructed wetlands (CWs). Since these organic compounds primarily originate from the photosynthetic fixation of atmospheric CO2, it potentially introduces uncertainty when assessing the greenhouse effect of biogenic carbon emissions in CWs based on direct field observations. To objectively assessing this effect, this study proposed a new strategy by quantifying CO2-equivalent (CO2-eq) changes as carbon passes through CWs and tested it in various types of CWs based on 64 literature records. The findings reveal that CWs can contribute to CO2-eq additions, yet are only responsible for 15.6% derived from direct field observations. The type of CWs plays a crucial role in these CO2-eq additions, with vertical flow CWs causing the lowest levels (6.8%), followed by surface flow CWs (14.2%). In contrast, horizontal flow CWs are associated with the strongest CO2-eq addition (25.7%). The findings provide new insights for the objective assessment of the greenhouse effect of biogenic carbon emissions in CWs, which will be beneficial for future life cycle assessment.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Environmental Pollutants / Wetlands Language: En Journal: J Environ Manage Year: 2024 Document type: Article Country of publication:

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Environmental Pollutants / Wetlands Language: En Journal: J Environ Manage Year: 2024 Document type: Article Country of publication: