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作者:

Fan, Xiao-Yan (Fan, Xiao-Yan.) (学者:樊晓燕) | Geng, Wen-Nian (Geng, Wen-Nian.) | Li, Xing (Li, Xing.) | Liu, Yuan-Kun (Liu, Yuan-Kun.) | Cao, Shen-Bin (Cao, Shen-Bin.) | Zhang, Xiao-Han (Zhang, Xiao-Han.) | Wang, Ya-Bao (Wang, Ya-Bao.)

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EI Scopus SCIE

摘要:

Quorum sensing inhibitors (QSIs) are considered as potentially promising alternatives to antibiotics, while their compound effects on activated sludge nitrification system are not known. This study aimed to investigate interactions among abundant-rare genera, functional genes, and antibiotic resistance genes (ARGs) under QSI (2(5 H)-furanone) and antibiotic (ofloxacin) compound stress, their post-effect, and signaling molecule effect in activated sludge nitrification system. High concentrations compound stress inhibited nitrification and increased total nitrogen removal to 76.84%. Extracellular polymeric substances (EPS) content tended to decrease with increasing compound stress concentrations, and post-effect promoted EPS secretion, while signaling molecule effect promoted protein content more significantly. Microbial community structure of conditionally abundant taxa was significantly altered under compound stress. Conditionally rare or abundant taxa was the core taxa and showed abundant positive correlations with rare taxa. High concentrations compound stress promoted the proliferation of specific nitrogen removal functional genera such as Mesorhizobium, Hydrogenophaga and Rhodococcus, the expression of denitrification functional genes such as nosZ and napAB and occurrences of ARGs. Strong co-expressions were observed among specific ARGs subtypes and functional genes, especially with denitrification functional genes, and further promoted by post-effect and signaling molecule effect, which could enhance microbial resistance to stress. Microbial communities and ARGs had significant effects on nitrogen removal performance, and together explained 21.80% of change. This study emphasized contributions of component interactions in maintaining performance.

关键词:

Antibiotic resistance genes Quorum sensing inhibitors Microbial community Co-expression Compound stress

作者机构:

  • [ 1 ] [Fan, Xiao-Yan]Beijing Univ Technol, Fac Architecture Civil & Transportat Engn, Beijing 100124, Peoples R China
  • [ 2 ] [Geng, Wen-Nian]Beijing Univ Technol, Fac Architecture Civil & Transportat Engn, Beijing 100124, Peoples R China
  • [ 3 ] [Li, Xing]Beijing Univ Technol, Fac Architecture Civil & Transportat Engn, Beijing 100124, Peoples R China
  • [ 4 ] [Liu, Yuan-Kun]Beijing Univ Technol, Fac Architecture Civil & Transportat Engn, Beijing 100124, Peoples R China
  • [ 5 ] [Cao, Shen-Bin]Beijing Univ Technol, Fac Architecture Civil & Transportat Engn, Beijing 100124, Peoples R China
  • [ 6 ] [Zhang, Xiao-Han]Beijing Univ Technol, Fac Architecture Civil & Transportat Engn, Beijing 100124, Peoples R China
  • [ 7 ] [Wang, Ya-Bao]Beijing Univ Technol, Fac Architecture Civil & Transportat Engn, Beijing 100124, Peoples R China
  • [ 8 ] [Fan, Xiao-Yan]Beijing Univ Technol, 100 Xi Da Wang Rd, Beijing 100124, Peoples R China

通讯作者信息:

  • 樊晓燕

    [Fan, Xiao-Yan]Beijing Univ Technol, 100 Xi Da Wang Rd, Beijing 100124, Peoples R China

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来源 :

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

ISSN: 2213-2929

年份: 2024

期: 2

卷: 12

7 . 7 0 0

JCR@2022

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SCOPUS被引频次: 6

ESI高被引论文在榜: 0 展开所有

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