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- W3155967129 abstract "Abstract An artificial floating island is an ecological restoration technology that aims to create sustainable ecosystems and improve biodiversity. Aquatic plants play an important role in wastewater purification. The floating island system exploits the combination of aquatic plants, microorganisms, and extracellular enzymes to purify wastewater. We investigated the purification efficiency of eight aquatic plant species ( Ceratophyllum demersum, Elodea nuttallii, Eichhornia crassipes, lris pseudacorus, lris sibirica, Myriophyllum verticillatum, Thalia dealbata and Oenanthe javanica) cultured in wastewater. The relationships of plant purification capacity with extracellular enzyme activity and microbial community were analyzed to explore the crucial factors that affect the plant purification capacity and the mechanism of pollutants removal in different plant systems. Three plant species, namely Oenanthe javanica , Thalia dealbata , and lris pseudacorus , were the most effective for purification of ammonium-nitrogen (NH 4 + -N), total phosphate (TP), and chemical oxygen demand (COD) with maximum efficiencies of 76.09%, 85.87%, and 89.10%, respectively. Urease, alkaline phosphatase (AP), and β-glucosidase activities were significantly and positively correlated with root system development ( P < 0.05). Activities of urease and AP were positively correlated with NH 4 + -N and TP removal, respectively. The magnitude of urease and AP activity was generally consistent with the plant’s capacity to remove NH 4 + -N and TP. β-Glucosidase activity and COD removal were not significantly correlated. The dominant microbial phylum in each species treatment was Proteobacteria. Alphaproteobacteria and Bacteroidia showed > 1% relative abundance and greater involvement in degradation of pollutants in the experimental system. The results provide a scientific and theoretical basis for improvement of the plant purification efficiency of artificial floating island systems." @default.
- W3155967129 created "2021-04-26" @default.
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- W3155967129 date "2021-04-12" @default.
- W3155967129 modified "2023-09-25" @default.
- W3155967129 title "Purification Efficiency of Eight Aquatic Plant Species in an Artificial Floating Island System in Relation to Extracellular Enzyme Activity and Microbial Community" @default.
- W3155967129 doi "https://doi.org/10.21203/rs.3.rs-381642/v1" @default.
- W3155967129 hasPublicationYear "2021" @default.
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