Zero-valent iron/iron oxide-oxyhydroxide/graphene as a magnetic sorbent for the enrichment of polychlorinated biphenyls, polyaromatic hydrocarbons and phthalates prior to gas chromatography-mass spectrometry (Journal article)

Karamani, A. A./ Douvalis, A. P./ Stalikas, C. D.

A composite magnetic material consisting of zero-valent iron, iron oxide-oxyhydroxide and graphene was synthesized and used successfully as a sorbent for the micro solid-phase extraction of PAHs, PCBs and phthalic acid esters. The components endow the composite with multiple characteristics such as adsorption capability and facile removal due to its magnetic properties. Due to the π-π electrostatic stacking property of graphene, the high specific surface area and the adsorption capability of both components, the resulting black flaky Fe0/iron oxide-oxyhydroxide/graphene composite showed high extraction efficiency for the target analytes from water samples. Compared with the neat graphene, the composite material has improved properties in terms of microextraction capabilities as both the hydrophobic graphene and zero-valent iron participate in the adsorption of the hydrophobic molecules. The precision from the extraction of all three groups of compounds was lower than 7% and the recoveries were from 90 to 93% from a spiked lake water sample. The high recoveries in relation to the low final volume of the desorption solvent ensure high preconcentration efficiency and a promising sorbent for analytical applications. © 2012 Elsevier B.V.
Institution and School/Department of submitter: Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών
Keywords: Gas chromatography,Magnetic microextraction,PAHs,PCBs,Phthalates,Zero-valent iron/iron oxide-oxyhydroxide/graphene,Microextraction,Zero-valent iron,Adsorption,Carboxylic acids,Desorption,Esters,Graphene,Hydrocarbons,Hydrophobicity,Iron,Iron oxides,Magnetic materials,Magnetic properties,Polychlorinated biphenyls,Organic pollutants,ferric hydroxide,humic acid,iron oxide,phthalic acid ester,polychlorinated biphenyl,polycyclic aromatic hydrocarbon,sorbent,accuracy,adsorption kinetics,article,chemical composition,concentration (parameters),controlled study,magnetism,mass fragmentography,pH measurement,physical chemistry,priority journal,solid phase microextraction,static electricity,surface property,water sampling,Chemical Fractionation,Ferric Compounds,Gas Chromatography-Mass Spectrometry,Graphite,Hydrogen-Ion Concentration,Magnetics,Phthalic Acids,Polycyclic Hydrocarbons, Aromatic,Sodium Chloride
ISSN: 219673
Appears in Collections:Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά)

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