Evidence for organic phosphorus activation and transformation at the sediment-water interface during plant debris decomposition
文献类型：期刊论文
| 作者 | Meng, Xin; Tang, Wenzhong; Shan, Baoqing; Zhang, Wenqiang; Zhu, Xiaolei; Jin, Xin |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2017-04-01 |
| 卷号 | 583期号:0页码:458-465 |
| 关键词 | Decomposition Plant Debris Sediment Solution P-31 Nmr Organic Phosphorus |
| 英文摘要 | The processes and mechanisms through which phosphorus (P) is released from sediment and organic P is transformed, induced by the decomposition of plant (duckweed (Lemma minor L)) debris, were studied experimentally. In the simulation experiments, the dissolved oxygen concentration, pH, and oxidation-reduction potential at the water-sediment interface first decreased rapidly. The lowest oxidation-reduction potential reached was 225.4 mV, and the solution became weakly acidic (pH 5.14) and anoxic (dissolved oxygen concentration 0.17 mg. L-1). The dissolved oxygen concentration, pH, and oxidation-reduction potential then became stable. The soluble reactive P, total dissolved P, and total P concentrations in the overlying water all increased rapidly because of the particulate P and dissolved organic P released as the plant debris decomposed. P-31 NMR analysis of the solution showed that orthophosphate monoesters were the main organic P compounds in the sediment. The orthophosphate monoester and orthophosphate diester concentrations were higher during the first 7 d of the experiment (at 71.2 and 153 mg.kg(-1), respectively) than later (60.8 and 14.6 mg.kg(-1), respectively). The decomposition of the duckweed could have mineralized the orthophosphate monoesters and orthophosphate diesters to give orthophosphate. The results indicated that the decomposition of aquatic plant debris is a key factor in the release of P from sediment even when external P is excluded. It is therefore necessary to remove plant debris from freshwater ecosystems to control the release of P from plant debris and sediment. (C) 2017 Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/39505]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Meng, Xin,Tang, Wenzhong,Shan, Baoqing,et al. Evidence for organic phosphorus activation and transformation at the sediment-water interface during plant debris decomposition[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2017,583(0):458-465. |
| APA | Meng, Xin,Tang, Wenzhong,Shan, Baoqing,Zhang, Wenqiang,Zhu, Xiaolei,&Jin, Xin.(2017).Evidence for organic phosphorus activation and transformation at the sediment-water interface during plant debris decomposition.SCIENCE OF THE TOTAL ENVIRONMENT,583(0),458-465. |
| MLA | Meng, Xin,et al."Evidence for organic phosphorus activation and transformation at the sediment-water interface during plant debris decomposition".SCIENCE OF THE TOTAL ENVIRONMENT 583.0(2017):458-465. |
入库方式： OAI收割
来源：生态环境研究中心
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。