DOI: 10.1016/j.watres.2017.11.004
Scopus记录号: 2-s2.0-85033582966
论文题名: Low voltage electric potential as a driving force to hinder biofouling in self-supporting carbon nanotube membranes
作者: Thamaraiselvan C. ; Ronen A. ; Lerman S. ; Balaish M. ; Ein-Eli Y. ; Dosoretz C.G.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 129 起始页码: 143
结束页码: 153
语种: 英语
英文关键词: Alternating current
; Bacterial attachment
; Biofouling
; Cell inactivation
; Self-supported CNT membrane
Scopus关键词: Bacteria
; Biofouling
; Capacitance
; Drag
; Electric fields
; Electric potential
; Electrochemical impedance spectroscopy
; Membranes
; Microfiltration
; Redox reactions
; Yarn
; Alternating current
; Antibiofouling strategies
; Bacterial attachment
; Carbon nanotube membranes
; Cell inactivation
; Cross flow filtration
; Electrically conductive
; Theoretical calculations
; Carbon nanotubes
; carbon nanotube
; carbon nanotube
; bacterium
; biofilm
; biofouling
; carbon nanotube
; electric field
; electrochemical method
; membrane
; optimization
; alternating current
; Article
; bacterial cell
; bacterial growth
; bacterial strain
; bacterium culture
; biofilm
; biofouling
; colony forming unit
; comparative study
; confocal laser scanning microscopy
; crossflow filtration
; direct current
; effluent
; electric capacitance
; electric conductivity
; electric potential
; electrochemical impedance spectroscopy
; energy expenditure
; image analysis
; nonhuman
; oxidation reduction reaction
; polarization
; priority journal
; Pseudomonas putida
; scanning electron microscopy
; waste water management
; X ray photoelectron spectroscopy
; artificial membrane
; biofouling
; electricity
; electrode
; filtration
; microbiology
; prevention and control
; Pseudomonas putida
; theoretical model
; Bacteria (microorganisms)
; Pseudomonas putida
; Biofouling
; Electricity
; Electrodes
; Filtration
; Membranes, Artificial
; Models, Theoretical
; Nanotubes, Carbon
; Pseudomonas putida
英文摘要: This study aimed at evaluating the contribution of low voltage electric field, both alternating (AC) and direct (DC) currents, on the prevention of bacterial attachment and cell inactivation to highly electrically conductive self-supporting carbon nanotubes (CNT) membranes at conditions which encourage biofilm formation. A mutant strain of Pseudomonas putida S12 was used a model bacterium and either capacitive or resistive electrical circuits and two flow regimes, flow-through and cross-flow filtration, were studied. Major emphasis was placed on AC due to its ability of repulsing and inactivating bacteria. AC voltage at 1.5 V, 1 kHz frequency and wave pulse above offset (+0.45) with 100Ω external resistance on the ground side prevented almost completely attachment of bacteria (>98.5%) with concomitant high inactivation (95.3 ± 2.5%) in flow-through regime. AC resulted more effective than DC, both in terms of biofouling reduction compared to cathodic DC and in terms of cell inactivation compared to anodic DC. Although similar trends were observed, a net reduced extent of prevention of bacterial attachment and inactivation was observed in filtration as compared to flow-through regime, which is mainly attributed to the permeate drag force, also supported by theoretical calculations in DC in capacitive mode. Electrochemical impedance spectroscopy analysis suggests a pure resistor behavior in resistance mode compared to involvement of redox reactions in capacitance mode, as source for bacteria detachment and inactivation. Although further optimization is required, electrically polarized CNT membranes offer a viable antibiofouling strategy to hinder biofouling and simplify membrane care during filtration. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113115
Appears in Collections: 气候减缓与适应
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作者单位: Faculty of Civil and Environmental Engineering and Grand Water Research Institute, Technion-Israel Institute of Technology, Haifa, 3200003, Israel; Department of Materials Science and Engineering, Technion-Israel Institute of Technology, Haifa, 3200003, Israel
Recommended Citation:
Thamaraiselvan C.,Ronen A.,Lerman S.,et al. Low voltage electric potential as a driving force to hinder biofouling in self-supporting carbon nanotube membranes[J]. Water Research,2018-01-01,129