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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
ISSN0567-7718
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
DOI10.1007/s10409-017-0650-2
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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
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
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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