Ecological determinants of 17α-ethynylestradiol biodegradation: Unveiling unique microbial community assemblages in lake sediments under nitrate or sulfate reduction.
In: Journal of Cleaner Production, Jg. 446 (2024-03-25), S. N.PAG
academicJournal
Zugriff:
Nitrate and sulfate, as electron acceptors (EAs), influence microbial communities and the subsequent biodegradation of emerging contaminants, such as 17α-ethynylestradiol (EE2) in anaerobic sediments. Results of this study showed that nitrate amendment significantly raised nitrate reduction intensity within a short period (<5 days) and greatly influenced microbial community succession compared with sulfate amendment. Nitrate reduction induced deterministic selections that narrowed the niche widths of the microbial community, creating direct correlations between functional members, including denitrifiers and potential estrogen degraders like Pseudomonas. The facilitative coordination of microbes and increased denitrification resulted in greater EE2 biodegradation under nitrate-reducing (0.19 ± 0.02 μg g−1) and combined nitrate- and sulfate-reducing conditions (0.23 ± 0.01 μg g−1) after 120 days. Moreover, natural organic matter enhanced interspecies syntrophic cooperation (the number of direct connectors increased from 9 to 25 in the microbial network) in the microbial community and further improved EE2 biodegradation efficiency to 0.26 ± 0.03 μg g−1. Conversely, sulfate reduction required longer adaptation (>20 days) with a higher contribution of stochastic processes in community assembly, yielding fewer connections with estrogen degraders and weaker EE2 biodegradation (0.15 ± 0.03 μg g−1). These mechanistic understandings can guide EA selection in the bioremediation of emerging contaminants. [Display omitted] • Impacts of nitrate and sulfate as EAs on anaerobic degradation of EE2 were compared. • EE2 degradation follows the order of nitrate and sulfate > nitrate > sulfate reducing. • Direct collaborations of denitrifiers and estrogen degraders promote EE2 degradation. • Sulfate reduction needs longer adaptation and has fewer linkages with EE2 degradation. • Natural organic matter enhances syntrophic cooperation and improves EE2 degradation. [ABSTRACT FROM AUTHOR]
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Ecological determinants of 17α-ethynylestradiol biodegradation: Unveiling unique microbial community assemblages in lake sediments under nitrate or sulfate reduction.
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Autor/in / Beteiligte Person: | Bai, Leilei ; Liu, Xin ; Wu, Yuanqiang ; Wang, Chunliu ; Wang, Changhui ; Jiang, Helong |
Zeitschrift: | Journal of Cleaner Production, Jg. 446 (2024-03-25), S. N.PAG |
Veröffentlichung: | 2024 |
Medientyp: | academicJournal |
ISSN: | 0959-6526 (print) |
DOI: | 10.1016/j.jclepro.2024.141400 |
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