Počet záznamů: 1

Adsorption of cellular peptides of Microcystis aeruginosa and two herbicides onto activated carbon. Effect of surface charge and interactions

  1. 1.
    0359739 - UH-J 2012 RIV GB eng J - Článek v odborném periodiku
    Hnaťuková, Petra - Kopecká, Ivana - Pivokonský, Martin
    Adsorption of cellular peptides of Microcystis aeruginosa and two herbicides onto activated carbon. Effect of surface charge and interactions.
    Water Research. Roč. 45, č. 11 (2011), s. 3359-3368 ISSN 0043-1354
    Grant CEP: GA AV ČR IAA200600902; GA ČR GPP105/10/P515
    Výzkumný záměr: CEZ:AV0Z20600510
    Klíčová slova: cellular organic matter * granular activated carbon * molecular weight distribution * surface charge * cyanobacterial peptides
    Kód oboru RIV: BK - Mechanika tekutin
    Impakt faktor: 4.865, rok: 2011

    In this research, the adsorption of two herbicides, alachlor (ALA) and terbuthylazine (TBA), on granular activated carbon (GAC) in the presence of well-characterized peptide fraction of cellular organic matter (COM) produced by cyanobacterium Microcystis aeruginosa was studied. Two commercially available GACs were characterized using nitrogen gas adsorption and surface charge titrations. The COM peptides of molecular weight (MW) <10 kDa were isolated and characterized using MW fractionation technique and high-performance size exclusion chromatography (HPSEC). Electrostatic interactions and hydrogen bonding proved to be important mechanisms of COM peptides adsorption. The adsorption of ALA and TBA on granular activated carbon preloaded with COM peptides was influenced by solution pH. The majority of the competition between COM peptides and both herbicides was attributed to low molecular weight COM peptides with MW of 700, 900, 1300 and 1700 Da.
    Trvalý link: http://hdl.handle.net/11104/0197465
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