Mechanism of eutrophication process during algal decomposition at the water/sediment interface
文献类型：期刊论文
| 作者 | Cui, Jingzhen; Jin, Zengfeng; Wang, Yan; Gao, Shuaishuai; Fu, Zhen; Yang, Youwei; Wang, Yun |
| 刊名 | JOURNAL OF CLEANER PRODUCTION
 |
| 出版日期 | 2021 |
| 卷号 | 309 |
| 英文摘要 | Water eutrophication has become a global environmental issue recently. Investigating the chemical gradient, spatial heterogeneity of dissolved oxygen, pH, phosphorus, sulfur, and iron (DO-pH-P-S-Fe) at the water/ sediment interface during different algal decomposition stages is critical for exploring the underlying mechanism of the eutrophication process. We conducted mesocosm experiments to observe the two-dimensional distribution imaging in micro-interface using a high-resolution system (e.g., diffusive gradients in thin films and planar optode probes). The process of algal decomposition includes three stages: algal accumulation, algal growth, and algal decay. The changes in the dissolved oxygen (DO) observed in overlying water and upper sediments (-15 mm) and the changes in pH occurred throughout the profile, with their peak values (245.14 mu mol L-1 and 10.7) corresponding to the highest chlorophyll-a content (600 mg m-3) and maximum photosynthetic activity, respectively. The distribution of P-S-Fe in overlying water and upper sediments (-20 mm) is mainly affected by the changes in DO and pH caused by algal decomposition, whereas it is mainly affected by microbial activities and other chemical processes in deep sediments. P-S-Fe converged from algae cell and sediments to overlying water during algal accumulation, migrated to sediments in algal growth, and stored in algal decay sediments, while formed black bloom (FeS) in overlying water. The findings of this study suggest that light and pH should be controlled during algal accumulation for controlling eutrophication. Moreover, P-S-Fe in overlying water and upper sediments is better to remove in this optimal period, which will contribute a new guideline for the environmental sustainability of water eutrophication caused by cyanobacteria bloom. |
| 源URL | [http://159.226.73.51/handle/332005/20448]  |
| 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 | Cui, Jingzhen,Jin, Zengfeng,Wang, Yan,et al. Mechanism of eutrophication process during algal decomposition at the water/sediment interface[J]. JOURNAL OF CLEANER PRODUCTION,2021,309. |
| APA | Cui, Jingzhen.,Jin, Zengfeng.,Wang, Yan.,Gao, Shuaishuai.,Fu, Zhen.,...&Wang, Yun.(2021).Mechanism of eutrophication process during algal decomposition at the water/sediment interface.JOURNAL OF CLEANER PRODUCTION,309. |
| MLA | Cui, Jingzhen,et al."Mechanism of eutrophication process during algal decomposition at the water/sediment interface".JOURNAL OF CLEANER PRODUCTION 309(2021). |
入库方式： OAI收割
来源：南京地理与湖泊研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。