DOI: 10.1016/j.watres.2017.11.003
Scopus记录号: 2-s2.0-85032985408
论文题名: Modeling the transport of sodium dodecyl benzene sulfonate in riverine sediment in the presence of multi-walled carbon nanotubes
作者: Song B. ; Xu P. ; Zeng G. ; Gong J. ; Wang X. ; Yan J. ; Wang S. ; Zhang P. ; Cao W. ; Ye S.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 129 起始页码: 20
结束页码: 28
语种: 英语
英文关键词: Adsorption
; Environmental risk
; Multi-walled carbon nanotubes
; Sediment
; Sodium dodecyl benzene sulfonate
; Transport
Scopus关键词: Adsorption
; Benzene
; Risk assessment
; Sediments
; Sodium
; Yarn
; Adsorption capacities
; Aquatic environments
; Break through curve
; Convection-dispersion equations
; Environmental risks
; Retardation factors
; Sodium dodecylbenzene sulfonate
; Transport
; Multiwalled carbon nanotubes (MWCN)
; dodecylbenzenesulfonic acid
; multi walled nanotube
; sodium derivative
; water
; benzenesulfonic acid derivative
; carbon nanotube
; dodecylbenzenesulfonic acid
; adsorption
; benzene
; breakthrough curve
; carbon nanotube
; convection
; dispersion
; environmental risk
; fluvial deposit
; modeling
; pollutant transport
; sodium
; sulfonate
; adsorption
; Article
; controlled study
; dispersion
; kinetics
; priority journal
; river
; sediment
; thermodynamics
; chemical model
; chemistry
; pollutant
; sediment
; Adsorption
; Benzenesulfonates
; Environmental Pollutants
; Geologic Sediments
; Models, Chemical
; Nanotubes, Carbon
; Water
英文摘要: The environmental risks of carbon nanotubes have received considerable attention. In this work, the effects of multi-walled carbon nanotubes (MWCNTs) on the adsorption of sodium dodecyl benzene sulfonate (SDBS) by riverine sediment and the transport of SDBS in sediment were studied. MWCNTs could significantly increase the adsorption capacity of the sediment for SDBS, thus affecting the transport of SDBS in sediment. Maximum adsorption capacity of the sediment for SDBS increases from 2.29 to 2.99 mg/g with the increasing content of MWCNTs from 0% to 1.5%. Breakthrough curves (BTCs) of SDBS obtained from the column experiments were described by the convection-dispersion equation, Thomas model, and Yan model. The estimated retardation factor R increases with the incorporation of MWCNTs, either in water or sediment. Additionally, the value of R is well correlated to the content of MWCNTs in sediment. Compared with Thomas model, Yan model is more suitable for fitting the BTCs with all the values of R2 ≥ 0.951, but it tends to overestimate the maximum adsorption capacity when the content of MWCNTs in sediment is relatively higher. The results of SDBS retention in sediment indicate that MWCNTs can increase the accumulation of SDBS in the top sediment layer, while they can impede the transport of SDBS into deeper sediment layer when incorporated into the sediment. These effects should be taken into consideration for risk assessment of CNTs in the aquatic environment. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113108
Appears in Collections: 气候减缓与适应
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作者单位: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha, 410082, China
Recommended Citation:
Song B.,Xu P.,Zeng G.,et al. Modeling the transport of sodium dodecyl benzene sulfonate in riverine sediment in the presence of multi-walled carbon nanotubes[J]. Water Research,2018-01-01,129