Added Biochars Promoted Nitrogen and Phosphorus Removal from Ecological Ditches at Low Temperature
文献类型: 外文期刊
作者: Bai, Guangsha 1 ; Pang, Si 3 ; Bi, Dongsu 1 ; Wang, Siqi 1 ; Cai, Min 3 ; Kong, Lingqi 1 ; Shen, Zheng 2 ; Zhang, Yalei 2 ;
作者机构: 1.Shanghai Inst Technol, Sch Chem & Environm Engn, Shanghai 201418, Peoples R China
2.Tongji Univ, Inst New Rural Dev, Shanghai 200092, Peoples R China
3.Shanghai Acad Agr Sci, Ecoenvironm Protect Res Inst, Shanghai 201403, Peoples R China
4.Shanghai Engn Res Ctr Low Carbon Agr, Shanghai 201403, Peoples R China
5.Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resource Reuse, Shanghai 200092, Peoples R China
关键词: ecological ditch; biochar; Vallisneria natans; microbial community; nitrogen and phosphorus removal
期刊名称:WATER ( 影响因子:3.4; 五年影响因子:3.5 )
ISSN:
年卷期: 2024 年 16 卷 8 期
页码:
收录情况: SCI
摘要: The global issue of ecological ditches being poor in removing nitrogen and phosphorus under cold winter temperatures has been identified. This study introduced three types of biochar (reed, rice, and corn) into ecological ditch sediments via two application methods: rhizosphere and mixed addition. The purpose was to explore how these methods affect the removal of nitrogen and phosphorus, as well as their influences on microbial communities in sediments. The results indicated that the addition of biochar to ecological ditches significantly enhanced the removal of nitrogen and phosphorus. Among the three types of biochar, the mixed addition of corn biochar yielded the greatest results, achieving removal rates of 77.1% for total nitrogen (TN), 93.3% for NH4+-N, and 90.3% for total phosphorus (TP). The growth of Vallisneria natans was greatly improved by the mixed addition method, resulting in an average increase of 154%. This improvement was superior to the rhizosphere addition group, which led to a growth increase of 125%. In comparison, the control group (CK) showed a decrease of 4.8% in growth. Different methods of biochar addition resulted in changes in the physicochemical properties and stoichiometry of the plants. Microbial analyses showed that the addition of biochar reduced the diversity and abundance of the substrate microbial community.
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