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| Impacts of the sulfonamides and plant types on purification performance of ecological floating beds |
| Received:August 22, 2024 |
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| KeyWord:ecological floating beds（EFBs）;plant selection and configuration;sulfamethoxazole;purification performance;functional genes |
| Author Name | Affiliation | E-mail | | CAI Min | Eco-environmental Protection Research Institute, Shanghai Academy of Agricultural Science, Shanghai 201403, China
Shanghai Engineering Research Center of Low-carbon Agriculture(SERCLA), Shanghai 201415, China | | | CUI Naxin | Eco-environmental Protection Research Institute, Shanghai Academy of Agricultural Science, Shanghai 201403, China
Shanghai Engineering Research Center of Low-carbon Agriculture(SERCLA), Shanghai 201415, China
Shanghai Kelite Agricultural Science (Group)Co., Ltd., Shanghai 201106, China | 86176241@qq.com | | PANG Si | Eco-environmental Protection Research Institute, Shanghai Academy of Agricultural Science, Shanghai 201403, China
Shanghai Engineering Research Center of Low-carbon Agriculture(SERCLA), Shanghai 201415, China | | | ZHANG Xu | Eco-environmental Protection Research Institute, Shanghai Academy of Agricultural Science, Shanghai 201403, China
Shanghai Engineering Research Center of Low-carbon Agriculture(SERCLA), Shanghai 201415, China | | | CHEN Guifa | Eco-environmental Protection Research Institute, Shanghai Academy of Agricultural Science, Shanghai 201403, China
Shanghai Engineering Research Center of Low-carbon Agriculture(SERCLA), Shanghai 201415, China | | | ZHOU Li | Eco-environmental Protection Research Institute, Shanghai Academy of Agricultural Science, Shanghai 201403, China
Shanghai Engineering Research Center of Low-carbon Agriculture(SERCLA), Shanghai 201415, China | | | ZOU Guoyan | Eco-environmental Protection Research Institute, Shanghai Academy of Agricultural Science, Shanghai 201403, China
Shanghai Engineering Research Center of Low-carbon Agriculture(SERCLA), Shanghai 201415, China | |
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| Abstract: |
| To elaborate the impacts of antibiotics and plant on ecological floating beds（EFBs）can effectively contribute to the synchronous removal of nitrogen, phosphorus, and antibiotics in the polluted water by plant selection and configuration. In this study, using the floating bed without plants as a control, the popular plant Cyperus alternifolius and the new plant Ruellia brittoniana Leonard were selected to construct EFBs vegetated with single plant species or combination of the two plant species. A sulfonamide-sulfamethoxazole（SMX） commonly used in aquaculture wastewater was added into the synthetic wastewater to investigate the purification performance of different EFBs on pollutants removal under antibiotic stress. The results showed that the removal efficiencies of total nitrogen（TN）, NH4+-N, total phosphorus（TP）, and chemical oxygen demand（COD） were 48.1% - 66.3%, 60.7% - 88.2%, 49.1% - 57.3%, and 65.4% - 72.8%, respectively, when treating wastewater without SMX. While under the stress of SMX, the removal efficiencies of TN, NH4+-N, TP, and COD were 42.6%-55.1%, 53.7%-68.5%, 39.0%-42.3% and 61.0%-71.0%, respectively. SMX decreased the removal rates of N, P, and COD. The results of two-way ANOVA analysis indicated that antibiotics and plant species significantly affected the pH, dissolved oxygen（DO） concentration and the removal efficiencies of TN, NH4+-N and TP in the EFBs（P<0.05）. The removal rate of SMX in different EFBs ranged from 60.4% to 92.2%, and the plants significantly improved the removal rate of SMX（P<0.05）. Plant combinations have potential advantages on the removal of N, P, COD, and SMX. Plant species and SMX significantly affected the abundance of the functional genes related to N and P removal in water（P<0.05）, which finally influenced the purification performance of EFBs. In summary, antibiotics are an important factor affecting the water purification performance of EFBs, and the synchronous removal efficiency of N, P, and antibiotics in polluted water can be effectively enhanced by optimizing the EFBs structure through plant selection and configuration. |
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