DOI: 10.1016/j.watres.2018.12.020
Scopus记录号: 2-s2.0-85059036056
论文题名: Development and evaluation of a mechanistic model to assess the fate and removal efficiency of hydrophobic organic contaminants in horizontal subsurface flow treatment wetlands
作者: Cancelli A.M. ; Gobas F.A.P.C. ; Wang Q. ; Kelly B.C.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 183
结束页码: 192
语种: 英语
英文关键词: Contaminant-fate modelling
; Horizontal subsurface flow
; Removal efficiency
; Treatment wetlands
Scopus关键词: Budget control
; Contamination
; Economic and social effects
; Efficiency
; Hydrophobicity
; Vegetation
; Contaminant concentrations
; Environmental conditions
; Horizontal subsurface flow
; Horizontal subsurface flow reed bed
; Hydrophobic organic contaminant
; Physicochemical property
; Removal efficiencies
; Treatment wetlands
; Wetlands
; galaxolide
; ground water
; hexachlorobenzene
; methyltriclosan
; musk ketone
; organic compound
; pentachlorobenzene
; biotransformation
; concentration (composition)
; empirical analysis
; environmental fate
; flow modeling
; hydrophobicity
; organic pollutant
; physicochemical property
; pollutant removal
; rhizome
; subsurface flow
; transpiration
; volatilization
; wastewater treatment
; wetland
; Article
; biotransformation
; evapotranspiration
; fluid balance
; hydrophobicity
; kinetics
; mechanics
; model
; particle resuspension
; physical chemistry
; priority journal
; rhizome
; sensitivity analysis
; steady state
; vegetation
; volatilization
; waste component removal
; waste water management
; water pollutant
; wetland
; Singapore [Southeast Asia]
英文摘要: A mechanistic model for assessing the fate and removal efficiency of hydrophobic organic contaminants in horizontal subsurface flow treatment wetlands was developed and evaluated using empirical concentration data from Singapore's Lorong Halus Treatment Wetland. This treatment wetland consists of a series of horizontal subsurface flow reed beds. The model, calibrated for the Lorong Halus Treatment Wetland, provided an adequate description of the concentrations of nine neutral organic substances in water, rhizomes and emergent vegetation in the wetland. The model was applied to investigate the sensitivity of the contaminant removal efficiency to environmental conditions and physicochemical properties of contaminants that enter the wetland. The water-budget of the wetland was found to exhibit an important influence on both the mass-removal efficiency and reduction of contaminant concentrations that can be achieved through wetland treatment. The model illustrated that removal pathways of organic contaminants in the wetland varied as a function of the properties of the contaminants. The mass-removal efficiency of the treatment wetland was greatest for chemicals with a log K OW between 3.0 and 5.0 and log K AW > −1.0. Removal of contaminants through volatilization was found to be greatest for substances with a log K OW between 3 and 5 and log K AW > 0. Transpiration flux in vegetation was found to be most important for substances with a log K OW between 4.5 and 5.5 and a log K AW between −5.0 and 0.0. Biotransformation rates of the contaminants in the wetland media play a crucial role in the removal of contaminants from wastewater. The model provides a tool for assessing the removal capacity of treatment wetlands for neutral organic contaminants and evaluating trade-offs in the design and operation of a horizontal subsurface flow treatment wetland. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122061
Appears in Collections: 气候变化事实与影响
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作者单位: The School of Resource and Environmental Management, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada; Department of Civil and Environmental Engineering, Faculty of Engineering, National University of Singapore (NUS), 21 Lower Kent Ridge Rd119077, Singapore
Recommended Citation:
Cancelli A.M.,Gobas F.A.P.C.,Wang Q.,et al. Development and evaluation of a mechanistic model to assess the fate and removal efficiency of hydrophobic organic contaminants in horizontal subsurface flow treatment wetlands[J]. Water Research,2019-01-01