Nitrogen budget at sediment-water interface altered by sediment dredging and settling particles: Benefits and drawbacks in managing eutrophication
文献类型：期刊论文
| 作者 | Zhong, Jicheng; Wen, Shuailong; Zhang, Lu; Wang, Jianjun; Liu, Cheng; Yu, Juhua; Zhang, Lei; Fan, Chengxin |
| 刊名 | JOURNAL OF HAZARDOUS MATERIALS
 |
| 出版日期 | 2021 |
| 卷号 | 406 |
| 英文摘要 | Internal nitrogen (N) loading of lakes is commonly controlled by sediment dredging, although its comprehensive effect on internal N loading remains unclear. Herein, we examined the long-term effects of sediment dredging on internal N loading from a new perspective on the N budget at the sediment-water interface (SWI) through a simulation of field dredging performed by incubating intact sediment cores from a shallow eutrophic lake (Lake Taihu). We further evaluated the role of settling particles (SP) in the recovery of N cycle processes after dredging and its potential impact on the N budget. Our results demonstrated that dredging could help reduce organic matter and total N in sediments; improve the redox environment of the SWI; slow down N mineralization, N fixation, denitrification, and anaerobic ammonia oxidation (anammox); and alter the N budget at the SWI and the contribution of various N cycle processes. However, the input of SP enriched in fresh organic matter and N could accelerate the recovery of N cycle processes at the SWI, reducing the variation in the N budget and the contribution of each N cycle process caused by dredging. Dredging significantly reduced the N flux at the SWI, which was evident from the reduction of inorganic N release flux and N removal through denitrification and anammox. Therefore, sediment dredging has its advantages and disadvantages in managing internal N loading in lakes. To maintain a long-term control on the release of internal N through sediment dredging, measures should be taken based on the in-lake and watershed to inhibit the inflow and settlement of particulate matter. |
| 源URL | [http://159.226.73.51/handle/332005/20600]  |
| 专题 | 中国科学院南京地理与湖泊研究所 |
| 推荐引用方式 GB/T 7714 | Zhong, Jicheng,Wen, Shuailong,Zhang, Lu,et al. Nitrogen budget at sediment-water interface altered by sediment dredging and settling particles: Benefits and drawbacks in managing eutrophication[J]. JOURNAL OF HAZARDOUS MATERIALS,2021,406. |
| APA | Zhong, Jicheng.,Wen, Shuailong.,Zhang, Lu.,Wang, Jianjun.,Liu, Cheng.,...&Fan, Chengxin.(2021).Nitrogen budget at sediment-water interface altered by sediment dredging and settling particles: Benefits and drawbacks in managing eutrophication.JOURNAL OF HAZARDOUS MATERIALS,406. |
| MLA | Zhong, Jicheng,et al."Nitrogen budget at sediment-water interface altered by sediment dredging and settling particles: Benefits and drawbacks in managing eutrophication".JOURNAL OF HAZARDOUS MATERIALS 406(2021). |
入库方式： OAI收割
来源：南京地理与湖泊研究所
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