The role of turbulence in internal phosphorus release: Turbulence intensity matters
文献类型：期刊论文
| 作者 | Li, Hong3; Yang, Guofeng3; Ma, Jianrong2; Wei, Yanyan1; Kang, Li3; He, Yixin3; He, Qiang3 |
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2019-09-01 |
| 卷号 | 252页码:84-93 |
| 关键词 | Sediment-water interface Phosphorus Turbulence Diffusive gradients in thin films (DGT) Microelectrode |
| ISSN号 | 0269-7491 |
| DOI | 10.1016/j.envpol.2019.05.068 |
| 通讯作者 | Li, Hong(hongli@cqu.edu.cn) |
| 英文摘要 | Hydrodynamic fluctuations can trigger sediment suspension concomitantly with internal phosphorus release, while the interactive effect of turbulence mixing and sediment suspension on the regulation of phosphorus dynamics is in need of deep understanding. This study addressed the changes in total phosphorus (TP), phosphate (PO43--P) and suspended sediment (SS) in the overlying water, and measured the profile of dissolved oxygen (DO), Fe(II) and soluble reactive phosphorus (SRP) across the sediment-water interface in the simulated environmental turbulence scenario, For a turbulence intensity (epsilon) of 3.6 x 10(-3) m(2)/s(3), the SRP flux increased hence PO43--P showed a 36.36% increase relative to its initial level. Although e of 1.3 x 10(-2) m(2)/s(3) benefited the delivery of oxygen from the bulk aqueous phase to the upper sediment which can trigger the formation of Fe oxides and hydroxides, the turbulence-induced phosphorus diffusion from the sediment exceeded its inactivation and resulted in a large SRP flux. However, a protion of the released PO43--P can be immobilized through SS adsorption and biotic (likely cyanobacteria) assimilation. Higher turbulence intensities (epsilon of 3.3 x 10(-2) and 7.4 x 10(-2) m(2)/s(3)) led to an approximately 40-fold increase in TP concentration and a significant increase in sediment suspension, which contributed to the immobilization of a majority of the phosphate through adsorption; thus, the PO43--P concentrations in the overlying water displayed 47.75% and 41.67% decline, respectively. This study also confirmed the sequential phosphorus buffer mechanisms associated with increasing turbulence intensities. With an e of 3.6 x 10(-3) m(2)/s(3), bounding to Fe ion had a significant impact on phosphorus inactivation but with an e of 7.4 x 10(-2) m(2)/s(3), the main immobilization mechanism is switched to phosphorus adsorption from the large quantity of suspended sediment. (C) 2019 Elsevier Ltd. All rights reserved. |
| 资助项目 | Natural Science Foundation of China[NSFC 51609024] ; Natural Science Foundation of China[41877472] ; Natural Science Foundation of China[41401574] ; Natural Science Foundation of China[41601537] ; Chongqing Research Program of Basic Research and Frontier Technology[cstc2016jcyjA0498] ; Chongqing Research Program of Basic Research and Frontier Technology[cstc2018jcyjAX0601] ; Fundamental Research Funds for the Central Universities[2019CDQYCH013] ; Fundamental Research Funds for the Central Universities[2018CDXYCH0014] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000483005500010 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.138/handle/2HOD01W0/9568]  |
| 专题 | 中国科学院重庆绿色智能技术研究院 |
| 通讯作者 | Li, Hong |
| 作者单位 | 1.Guangxi Univ, Coll Agr, Guangxi Key Lab Agroenvironm & Agroprod Safety, Cultivat Base, Nanning 530004, Peoples R China 2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, CAS Key Lab Reservoir Environm, Chongqing 400714, Peoples R China 3.Chongqing Univ, Minist Educ, Key Lab Ecoenvironm Three Gorges Reg, Chongqing 400044, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Hong,Yang, Guofeng,Ma, Jianrong,et al. The role of turbulence in internal phosphorus release: Turbulence intensity matters[J]. ENVIRONMENTAL POLLUTION,2019,252:84-93. |
| APA | Li, Hong.,Yang, Guofeng.,Ma, Jianrong.,Wei, Yanyan.,Kang, Li.,...&He, Qiang.(2019).The role of turbulence in internal phosphorus release: Turbulence intensity matters.ENVIRONMENTAL POLLUTION,252,84-93. |
| MLA | Li, Hong,et al."The role of turbulence in internal phosphorus release: Turbulence intensity matters".ENVIRONMENTAL POLLUTION 252(2019):84-93. |
入库方式： OAI收割
来源：重庆绿色智能技术研究院
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