Empirical model for estimating vertical concentration profiles of re-suspended, sediment-associated contaminants | |
Zhu HW; Cheng PD(程鹏达); Li W; Chen JH; Pang Y; Wang DZ | |
发表期刊 | ACTA MECHANICA SINICA |
2017-10-01 | |
卷号 | 33期号:5页码:846-854 |
ISSN | 0567-7718 |
摘要 | Vertical distribution processes of sediment contaminants in water were studied by flume experiments. Experimental results show that settling velocity of sediment particles and turbulence characteristics are the major hydrodynamic factors impacting distribution of pollutants, especially near the bottom where particle diameter is similar in size to vortex structure. Sediment distribution was uniform along the distance, while contaminant distribution slightly lagged behind the sediment. The smaller the initial sediment concentration was, the more time it took to achieve a uniform concentration distribution for suspended sediment. A contaminants transportation equation was established depending on mass conservation equations. Two mathematical estimation models of pollutant distribution in the overlying water considering adsorption and desorption were devised based on vertical distribution of suspended sediment: equilibrium partition model and dynamic micro-diffusion model. The ratio of time scale between the sediment movement and sorption can be used as the index of the models. When this ratio was large, the equilibrium assumption was reasonable, but when it was small, it might require dynamic micro-diffusion model. |
关键词 | Sediment Resuspension Pollutants Concentration Distribution Desorption Partition Coefficient |
DOI | 10.1007/s10409-017-0650-2 |
URL | 查看原文 |
收录类别 | SCI ; EI ; CSCD |
语种 | 英语 |
WOS记录号 | WOS:000411700100002 |
关键词[WOS] | Water Interface ; Transport ; Release ; Phosphorus ; Mechanisms |
WOS研究方向 | Engineering ; Mechanics |
WOS类目 | Engineering, Mechanical ; Mechanics |
项目资助者 | National Natural Science Foundation of China(11502138) ; National Key Research and Development Program(2016YFC0401500) ; National Water Pollution Control and Treatment Science and Technology Major Project(2012ZX07506-002b) |
CSCD记录号 | CSCD:6094890 |
课题组名称 | LMFS水环境流体力学(LEM) |
论文分区 | 二类 |
力学所作者排名 | 1 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/70067 |
专题 | 流固耦合系统力学重点实验室 |
通讯作者 | Cheng PD(程鹏达) |
推荐引用方式 GB/T 7714 | Zhu HW,Cheng PD,Li W,et al. Empirical model for estimating vertical concentration profiles of re-suspended, sediment-associated contaminants[J]. ACTA MECHANICA SINICA,2017,33,5,:846-854. |
APA | Zhu HW,Cheng PD,Li W,Chen JH,Pang Y,&Wang DZ.(2017).Empirical model for estimating vertical concentration profiles of re-suspended, sediment-associated contaminants.ACTA MECHANICA SINICA,33(5),846-854. |
MLA | Zhu HW,et al."Empirical model for estimating vertical concentration profiles of re-suspended, sediment-associated contaminants".ACTA MECHANICA SINICA 33.5(2017):846-854. |
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