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| Iron-based biochar sponge and submerged plant synergistic purification on nitrogen and phosphorus in water |
| Received:June 07, 2022 |
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| KeyWord:iron-based biochar sponge;submerged plant;nitrogen and phosphorus removal |
| Author Name | Affiliation | E-mail | | WANG Gang | Key Laboratory of Environmental Restoration and Ecological Health of Ministry of Education, College of Environment and Resources, Zhejiang University, Hangzhou 310000, China | | | CHEN Dan | Key Laboratory of Environmental Restoration and Ecological Health of Ministry of Education, College of Environment and Resources, Zhejiang University, Hangzhou 310000, China | | | LI Jiangzhou | Yunnan Tobacco Company Yuxi Branch, Yuxi 653100, China | | | ZHANG Cuiping | Yunnan Tobacco Company Yuxi Branch, Yuxi 653100, China | | | NA Hongyan | Yunnan Tobacco Company Yuxi Branch, Yuxi 653100, China | | | DAI Kuai | Yunnan Tobacco Company Yuxi Branch, Yuxi 653100, China | daikuai520@163.com | | YANG Xiaoe | Key Laboratory of Environmental Restoration and Ecological Health of Ministry of Education, College of Environment and Resources, Zhejiang University, Hangzhou 310000, China | xyang@zju.edu.cn |
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| Abstract: |
| This study aimed to better understand the effects of an iron-based biochar sponge and submerged plant synergism purification system on nitrogen and phosphorus removal from farmland drainage. The effects of different purification systems on total phosphorus, total nitrogen, and ammonia nitrogen levels in farmland drainage were studied using three submerged plants, Vallisneria natans, Elodea spp.,Ceratophyllum demersum, and an iron-based biochar sponge. The results showed that the three submerged plants could grow and develop well in farmland drainage with high nitrogen and phosphorus concentrations, and the plant height and biomass increased significantly. In the single submerged plant purification system, Ceratophyllum demersum had the highest total phosphorus removal efficiency, reaching 29.85%; Vallisneria natans had the highest total nitrogen removal efficiency, reaching 35.03%; and Ceratophyllum demersum had the highest ammonia nitrogen removal efficiency, reaching 83.09%. The highest total phosphorus and ammonia nitrogen removal efficiencies were observed in the iron-based biochar and Ceratophyllum demersum synergistic purification system, reaching 56.00% and 91.86%, respectively. The total nitrogen removal efficiency in the iron-based biochar and Vallisneria natans synergistic purification system was the highest, reaching 54.05%. The results show that the removal of nitrogen and phosphorus in the synergistic purification system of an ironbased biochar sponge and submerged plant is better than that of a single submerged plant purification system. |
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