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- W2894840963 abstract "In consideration of severe eutrophication of scenic water caused by pollutants released from sediments in summer, calcium peroxide (CaO2) was adopted as the slow release peroxide to improve the water quality in a field experiment of 600 m2. The effect of CaO2 on the overlying water, interstitial water, sediment, and sediment microorganisms of scenic water was studied. Results for two months indicated that the dissolved oxygen (DO) concentration of the overlying water in the test zone was 3.78 times that in the control zone; the oxidation–reduction potential (ORP) in the overlying water and sediment increased significantly (p = 0.002 and p = 0). Meanwhile, CaO2 could effectively inhibit the release of nitrogen (N) and phosphorus (P) from the sediment and could obviously reduce the concentrations of N and P in the overlying water by enhancing the microbiological action. Moreover, the average concentrations of total nitrogen and total phosphorus in the overlying water of the test zone were 46.27% and 50.51% of those in control zone, respectively, and the concentrations of N and P in the interstitial water decreased during the entire experiment. In addition, CaO2 decreased the relative abundance of anaerobic bacteria in the sediment, whereas it increased that of aerobic bacteria and promoted the appearance of the functional bacteria, such as Nitrospirae and Thermodesulfoba. In conclusion, CaO2 can improve the DO and ORP in the eutrophic water effectively and change the microbial community in the sediment to a certain extent, thereby controlling the pollutants released from the sediment and reducing the N and P concentrations in the overlying water. Thus, CaO2 can effectively realize the purification and restoration of the severely eutrophic scenic water." @default.
- W2894840963 created "2018-10-12" @default.
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- W2894840963 date "2019-02-01" @default.
- W2894840963 modified "2023-09-29" @default.
- W2894840963 title "Effects and mechanisms of calcium peroxide on purification of severely eutrophic water" @default.
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- W2894840963 doi "https://doi.org/10.1016/j.scitotenv.2018.10.040" @default.
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