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Naslov:An extracellular polymeric substance quickly chelates mercury(II) with N-heterocyclic groups
Avtorji:ID Baldi, Franco, University Cà Foscari Venezia (Avtor)
ID Gallo, Michele, University Cà Foscari Venezia (Avtor)
ID Daniale, Salvatore, University Cà Foscari Venezia (Avtor)
ID Battistel, Dario, University Cà Foscari Venezia (Avtor)
ID Faleri, Claudia, Siena University (Avtor)
ID Kodre, Alojz, Univerza v Ljubljani (Avtor)
ID Arčon, Iztok, Univerza v Novi Gorici (Avtor)
Datoteke: Gradivo nima datotek, ki so prostodostopne za javnost. Gradivo je morda fizično dosegljivo v knjižnici fakultete, zalogo lahko preverite v COBISS-u. Povezava se odpre v novem oknu
Jezik:Angleški jezik
Vrsta gradiva:Delo ni kategorizirano
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:UNG - Univerza v Novi Gorici
Opis:A strain of Klebsiella oxytoca DSM 29614 is grown on sodium citrate in the presence of 50 mg l−1 of Hg as Hg(NO3)2. During growth, the strain produces an extracellular polymeric substance (EPS), constituted by a mixture of proteins and a specific exopolysaccharide. The protein components, derived from the outer membrane of cells, are co-extracted with the extracellular exopolysaccharide using ethanol. The extracted EPS contains 7.5% of Hg (total amount). This indicates that EPS is an excellent material for the biosorption of Hg2+, through chemical complexation with the EPS components. The binding capacity of these species towards Hg2+ is studied by cyclic voltammetry, and Hg L3-edge XANES and EXAFS spectroscopy. The results found indicate that Hg2+ is mainly bound to the nitrogen of the imidazole ring or other N-heterocycle compounds. The hydroxyl moities of sugars and/or the carboxyl groups of two glucuronic acids in the polysaccharide can also play an important role in sequestring Hg2+ ions. However, N-heterocyclic groups of proteins bind Hg2+ faster than hydroxyl and carboxyl groups of the polysaccharide.
Ključne besede:Klebsiella oxytoca, Biosorption, Proteins, Polysaccharide, Cyclic voltammetry, EXAFS analysis
Verzija publikacije:Recenzirani rokopis
Leto izida:2017
Št. strani:10
Številčenje:February 2017
PID:20.500.12556/RUNG-3004-5ba07d23-9418-50e3-4a4b-24546cf64098 Novo okno
COBISS.SI-ID:4706811 Novo okno
DOI:10.1016/j.chemosphere.2017.02.093 Novo okno
NUK URN:URN:SI:UNG:REP:MUXZ5NMW
Datum objave v RUNG:03.03.2017
Število ogledov:6155
Število prenosov:0
Metapodatki:XML DC-XML DC-RDF
:
BALDI, Franco, GALLO, Michele, DANIALE, Salvatore, BATTISTEL, Dario, FALERI, Claudia, KODRE, Alojz in ARČON, Iztok, 2017, An extracellular polymeric substance quickly chelates mercury(II) with N-heterocyclic groups. Chemosphere [na spletu]. 2017. Vol. February 2017. [Dostopano 11 april 2025]. DOI 10.1016/j.chemosphere.2017.02.093. Pridobljeno s: https://repozitorij.ung.si/IzpisGradiva.php?lang=slv&id=3004
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Gradivo je del revije

Naslov:Chemosphere
Založnik:Elsevier
Leto izida:2017
ISSN:0045-6535

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