Effect of light and oxygen on repetitive bacterial inactivation on uniform, adhesive, robust and stable Cu-polyester surfaces
-
Sami Rtimi
,
Rosendo Sanjines
Abstract
This study reports new findings on the sputtered Cu-polyester (Cu-PES) bacterial inactivation under low intensity visible light (λ >400 nm). Cu-PES samples sputtered for 160 s led to the complete inactivation of E. coli in anaerobic and aerobic media within 45 min. The (Cu-PES) oxidative radicals generated in aerobic media were not the only intermediates leading to bacterial inactivation. Bacterial inactivation also proceeds in the dark under anaerobic conditions. For this reason, the oxidative radicals were leading to bacterial reduction were unambiguously identified by appropriate scavengers. X-ray photoelectron spectroscopy (XPS) provided evidence for redox catalysis going within the time required by Cu-PES to induce bacterial reduction. Furthermore, the Cu-ions in the ppb range leached from the Cu-PES during bacterial reduction were monitored by inductively coupled plasma mass spectrometry (ICP-MS) and the Cu found were below the limit allowed for mammalian cells. By infrared spectroscopy (ATR-FTIR) the bacteria stretching shifts of the predominant lipo-polysaccharide (LPS) associated-(CH2) groups were monitored. The overstretching of these groups determined the time necessary for bond scission/bacterial inactivation.
Funding statement: We acknowledge the EPFL and Swiss National Science Foundation (SNF) Project (200021-143283/1) for the funding of this study.
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Articles in the same Issue
- Editorial: The importance of advanced oxidation processes in degrading persistent pollutants
- An overview on heterogeneous Fenton and photoFenton reactions using zerovalent iron materials
- Photooxidative Degradation of Pesticides in Water; Response Surface Modeling Approach
- The treatment of aniline in aqueous solutions by gamma irradiation
- Microwave regeneration of biological activated carbon
- Molecular iodine/aqueous NH4OAc: a green reaction system for direct oxidative synthesis of nitriles from amines
- Catalytic Degradation of Safranin T in Aqueous Medium Using Non-conventional Processes
- Oxidation of 1, 2-dichlorobenzene on a commercial V2O5-WO3/nano-TiO2 catalyst: Effect of HCl addition
- Current conduction mechanisms in thermal nitride and dry gate oxide grown on 4H-silicon carbide (SiC)
- Effect of light and oxygen on repetitive bacterial inactivation on uniform, adhesive, robust and stable Cu-polyester surfaces
- Wet oxidation of an industrial high concentration pharmaceutical wastewater using hydrogen peroxide as an oxidant
- Oxidation characteristics of heavy crude oil in ignition process
- Comparative studies on the performance of porous Ti/Sno2-Sb2O3/Pbo2 enhanced by CNT and Bi Co-doped electrodes for methyl orange oxidation
- Application of photocatalytic paint for destruction of benzo[a]pyrene. Impact of air humidity
- Spray-drying synthesis and characterization of Li4Ti5O12 anode material for lithium ion batteries
- Kinetics analysis of photocatalytic degradation of Acid Orange 7 by Co/N/Er3+: Y3Al5O12/TiO2 films
- Reaction characteristics of oxygen generation from plate-like potassium superoxide within a confined space
- Electrochemical reduction of CO2 on a Cu2O/polyaniline /stainless steel based electrode
- Role of oxygen-containing functional surface groups of activated carbons on the elimination of 2-hydroxybenzothiazole from waters in A hybrid heterogeneous ozonation system
- The degradation efficiency and mechanism of meclofenamic acid in aqueous solution by UV irradiation
- Effect of electrode oxide film in micro arc oxidation on water treatment
- Photocurrent response and photocatalytic activity of Nd-doped TiO2 thin films prepared by sol-gel method
- Mathematical model involving chemical reaction and mass transfer for the ozonation of dimethyl phthalate in water in a bubble column reactor
- Elimination of organic micro-contaminants in municipal wastewater by a combined immobilized biomass reactor and solar photo-Fenton tertiary treatment
- Degradation of catechol on BiOCl: charge transfer complex formation and photoactivity
- Photocatalytic degradation of phenol on strontium titanate supported on HZSM-5
- Selective Fenton-like catalytic oxidation of acid orange II on inorganic heterogeneous molecular imprinted catalysts
- Decoloration of azo dye methyl orange by a novel electro-Fenton internal circulation batch reactor
Articles in the same Issue
- Editorial: The importance of advanced oxidation processes in degrading persistent pollutants
- An overview on heterogeneous Fenton and photoFenton reactions using zerovalent iron materials
- Photooxidative Degradation of Pesticides in Water; Response Surface Modeling Approach
- The treatment of aniline in aqueous solutions by gamma irradiation
- Microwave regeneration of biological activated carbon
- Molecular iodine/aqueous NH4OAc: a green reaction system for direct oxidative synthesis of nitriles from amines
- Catalytic Degradation of Safranin T in Aqueous Medium Using Non-conventional Processes
- Oxidation of 1, 2-dichlorobenzene on a commercial V2O5-WO3/nano-TiO2 catalyst: Effect of HCl addition
- Current conduction mechanisms in thermal nitride and dry gate oxide grown on 4H-silicon carbide (SiC)
- Effect of light and oxygen on repetitive bacterial inactivation on uniform, adhesive, robust and stable Cu-polyester surfaces
- Wet oxidation of an industrial high concentration pharmaceutical wastewater using hydrogen peroxide as an oxidant
- Oxidation characteristics of heavy crude oil in ignition process
- Comparative studies on the performance of porous Ti/Sno2-Sb2O3/Pbo2 enhanced by CNT and Bi Co-doped electrodes for methyl orange oxidation
- Application of photocatalytic paint for destruction of benzo[a]pyrene. Impact of air humidity
- Spray-drying synthesis and characterization of Li4Ti5O12 anode material for lithium ion batteries
- Kinetics analysis of photocatalytic degradation of Acid Orange 7 by Co/N/Er3+: Y3Al5O12/TiO2 films
- Reaction characteristics of oxygen generation from plate-like potassium superoxide within a confined space
- Electrochemical reduction of CO2 on a Cu2O/polyaniline /stainless steel based electrode
- Role of oxygen-containing functional surface groups of activated carbons on the elimination of 2-hydroxybenzothiazole from waters in A hybrid heterogeneous ozonation system
- The degradation efficiency and mechanism of meclofenamic acid in aqueous solution by UV irradiation
- Effect of electrode oxide film in micro arc oxidation on water treatment
- Photocurrent response and photocatalytic activity of Nd-doped TiO2 thin films prepared by sol-gel method
- Mathematical model involving chemical reaction and mass transfer for the ozonation of dimethyl phthalate in water in a bubble column reactor
- Elimination of organic micro-contaminants in municipal wastewater by a combined immobilized biomass reactor and solar photo-Fenton tertiary treatment
- Degradation of catechol on BiOCl: charge transfer complex formation and photoactivity
- Photocatalytic degradation of phenol on strontium titanate supported on HZSM-5
- Selective Fenton-like catalytic oxidation of acid orange II on inorganic heterogeneous molecular imprinted catalysts
- Decoloration of azo dye methyl orange by a novel electro-Fenton internal circulation batch reactor
