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- W2000372900 abstract "Iron-based ecological floating beds (EFBs) are often used to treat the secondary effluent from wastewater treatment plant to enhance the denitrification process. However, the impact and necessity of plants on iron-based EFBs have not been systematically studied. In this research, two iron-based EFBs with and without plants (EFB-P and EFB) were performed to investigate the response of plants on nutrient removal, GHG emissions, microbial communities and functional genes. Results showed the total nitrogen and total phosphorus removal in EFB-P was 45–79% and 48–72%, respectively, while that in EFB was 31–67% and 44–57%. Meanwhile, plants could decrease CH4 emission flux (0–3.89 mg m−2 d−1) and improve CO2 absorption (4704–22321 mg m−2 d−1). Plants could increase the abundance of Nitrosospira to 1.6% which was a kind of nitrifying bacteria dominant in plant rhizosphere. Among all denitrification related genera, Simplicispira (13.08%) and Novosphingobium (6.25%) accounted for the highest proportion of plant rhizosphere and iron scrap, respectively. Anammox bacteria such as Candidatus_Brocadia was more enriched on iron scraps with the highest proportion was 1.21% in EFB-P, and 2.20% in EFB. Principal co-ordinates analysis showed that plants were the critical factor determining microbial community composition. TN removal pathways were mixotrophic denitrification and anammox in EFB-P while TP removal pathways were plant uptake and phosphorus-iron coprecipitation. In general, plants play an important directly or indirectly role in iron-based EFBs systems, which could not only improve nutrients removal, but also minimize the global warming potential and alleviate the greenhouse effect to a certain extent." @default.
- W2000372900 created "2016-06-24" @default.
- W2000372900 creator A5038452432 @default.
- W2000372900 date "2013-12-01" @default.
- W2000372900 modified "2023-09-30" @default.
- W2000372900 title "Plants in constructed, restored and created wetlands" @default.
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- W2000372900 doi "https://doi.org/10.1016/j.ecoleng.2013.10.035" @default.
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