Evaluation of novel, cationic electrospun microfibrous membranes as adsorbents in bacteria removal

Autor: Papaphilippou, Petri Ch, Vyrides, Ioannis, Mpekris, Fotios, Stylianopoulos, Triantafyllos, Papatryfonos, Charalambos A., Theocharis, Charis R., Krasia‐Christoforou, Theodora
Přispěvatelé: Krasia-Christoforou, T. [0000-0002-9915-491X], Stylianopoulos, T. [0000-0002-3093-1696], Stylianopoulos, Triantafyllos [0000-0002-3093-1696], Theocharis, Charis R. [0000-0002-1669-4954], Krasia‐Christoforou, Theodora [0000-0002-9915-491X], Vyrides, Ioannis [0000-0001-8316-4577]
Jazyk: angličtina
Rok vydání: 2015
Předmět:
Polymethyl methacrylates
General Chemical Engineering
Wastewater treatment
chemistry.chemical_compound
Adsorption efficiency
Gravimetric analysis
Copolymer
UV-vis spectrophotometry
Methyl methacrylate
Aqueous solution
biology
Chemistry
Adsorption isotherms
Langmuir adsorption model
Esters
Thermogravimetric analysis
Solutions
Nanofibrous microfiltration membranes
Membrane
Gram-negative bacteria
Viruses
Pseudomonas aeruginosa
symbols
Earth and Related Environmental Sciences
Natural Sciences
Tensile testing
Scanning electron microscopy
High-flux microfiltration
Chemical compositions
Malachite green
Microorganisms
Methacrylate
Thermodynamic stability
Microbiology
Isotherms
symbols.namesake
Adsorption
Monolayer adsorption
Thermal gravimetric analyses (TGA)
Escherichia coli
Chromatography
Membranes
Bacteria
technology
industry
and agriculture

General Chemistry
Langmuir isotherm models
biology.organism_classification
Advenella
Disinfection
Micropollutants
Nuclear chemistry
Zdroj: RSC Advances
RSC Adv.
Popis: Electrospun microfibrous membranes comprised of poly(methyl methacrylate)-poly((2-diethylamino)ethyl methacrylate) random copolymers (PMMA-co-PDEAEMA) of various chemical compositions blended together with a commercially available PMMA have been fabricated with diameters between 4.0-6.4 μm and further evaluated as adsorbents for bacteria removal from aqueous media. The morphology and thermal stability of the membranes were determined by scanning electron microscopy (SEM) and thermal gravimetric analysis (TGA), respectively. Tensile tests were also performed in order to investigate their mechanical properties. Membrane evaluation as adsorbents against two Gram-negative bacteria namely Pseudomonas aeruginosa and Advenella species revealed that the membranes containing the highest percentage of the cationic moieties (DEAEMA) exhibited the highest adsorption efficiency. The bacteria removal by the microfibrous membranes was studied by UV-vis spectrophotometry upon measuring the optical density (OD) of the microorganisms. The highest recorded bacteria removal percentages after 8 h were approximately 70% and 45%, for the Pseudomonas aeruginosa and Advenella species respectively, whereas in both cases complete (100%) bacteria removal was observed after 24 h of membrane immersion in bacteria-containing aqueous solutions. The experimental adsorption isotherms for P. aeruginosa and Advenella sp. were well-fitted with the Langmuir isotherm model indicating a monolayer adsorption process. SEM was also used to confirm the adhesion of the bacteria onto the electrospun microfibers. Most importantly, these materials exhibited great performance for the removal of microorganisms from urban wastewater as determined via the standard plating technique prepared by agar. © The Royal Society of Chemistry. 5 83 67617 67629 Cited By :3
Databáze: OpenAIRE