IMECH-IR  > 流固耦合系统力学重点实验室
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
Source PublicationACTA MECHANICA SINICA
2017-10-01
Volume33Issue:5Pages:846-854
ISSN0567-7718
Abstract

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.

KeywordSediment Resuspension Pollutants Concentration Distribution Desorption Partition Coefficient
DOI10.1007/s10409-017-0650-2
URL查看原文
Indexed BySCI ; EI ; CSCD
Language英语
WOS IDWOS:000411700100002
WOS KeywordWater Interface ; Transport ; Release ; Phosphorus ; Mechanisms
WOS Research AreaEngineering ; Mechanics
WOS SubjectEngineering, Mechanical ; Mechanics
Funding OrganizationNational 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 IDCSCD:6094890
DepartmentLMFS水环境流体力学(LEM)
Classification二类
Ranking1
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/70067
Collection流固耦合系统力学重点实验室
Corresponding AuthorCheng PD(程鹏达)
Recommended Citation
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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