中国水产科学研究院机构知识库

Synergistic mechanisms of denitrification in FeS2-based 2-based constructed wetlands: Effects of organic carbon availability under day-night alterations

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文献类型：外文期刊

作者： Hao, Qirui ¹ ; Lyu, Xiaonan ³ ; Qin, Dongli ¹ ; Du, Ningning ¹ ; Wu, Song ¹ ; Bai, Shuyan ¹ ; Chen, Zhongxiang ¹ ; Wang, Peng ¹ ; Zhao, Xinyue ² ;

作者机构： 1.Chinese Acad Fishery Sci, Heilongjiang River Fisheries Res Inst, Harbin 150070, Peoples R China

2.Northeast Agr Univ, Coll Resources & Environm, Harbin 150030, Peoples R China

3.Beijing Aquat Technol Extens Stn, Beijing 100021, Peoples R China

关键词： Day-night changes; Nitrogen metabolism; Microbial community; Fe-N coupling

期刊名称：BIORESOURCE TECHNOLOGY （影响因子：9.7；五年影响因子：9.4 ）

ISSN： 0960-8524

年卷期： 2024 年 406 卷

页码：

收录情况： SCI

摘要： In constructed wetlands (CWs), carbon source availability profoundly affected microbial metabolic activities engaged in both iron cycle and nitrogen metabolism. However, research gaps existed in understanding the biotransformation of nitrogen and iron in response to fluctuations in organic carbon content under day-night alterations. Results demonstrated increased removal efficiency of NO3- 3--N (95.7 %) and NH4+-N 4 +-N (75.70 %) under light conditions, attributed to increased total organic carbon (TOC). This enhancement promoted the relative abundance of bacteria involved in nitrogen and iron processes, establishing a more stable microbial network. Elevated TOC content also upregulated genes for iron metabolism and glycolysis, facilitating denitrification. Spearman correlation analysis supported the synergistic mechanisms between FeS2-based 2-based autotrophic denitrification and TOC-mediated heterotrophic denitrification under light conditions. The significant impact of carbon sources on microbial activities underscores the critical role of organic carbon availability in enhancing nitrogen removal efficiency, providing valuable insights for optimizing FeS2-based 2-based CWs design and operation strategies.

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意见箱

Synergistic mechanisms of denitrification in FeS2-based 2-based constructed wetlands: Effects of organic carbon availability under day-night alterations

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