Effect of cellular peptides of Microcystis aeruginosa on granular activated carbon adsorption of herbicides

0378898 - ÚH 2013 HU eng C - Konferenční příspěvek (zahraniční konf.)
Kopecká, Ivana - Šafaříková, Jana - Pivokonský, Martin - Hnaťuková, Petra
Effect of cellular peptides of Microcystis aeruginosa on granular activated carbon adsorption of herbicides.
Proceedings of the 6th IWA International Conference for Young Water Professionals. Budapest: IWA, 2012, IWA-9903.
[IWA International Conference for Young Water Professionals /6./ (IWA YWPC 2012). Budapest (HU), 10.07.2012-13.07.2012]
Grant CEP: GA ČR GAP105/11/0247
Výzkumný záměr: CEZ:AV0Z20600510
Klíčová slova: activated carbon * adsorption * cellular peptides * herbicides * Microcystis aeruginosa
Kód oboru RIV: BK - Mechanika tekutin

This study is aimed at the adsorption of organic micropollutants onto granular activated carbon (GAC) and the effect of cellular organic matter (COM) produced by Microcystis aeruginosa on this process. Adsorption experiments were performed for two herbicides with distinct chemical structure (alachlor and terbuthylazine) and two types of GAC with different surface charge (Norit 1240 and Filtrasorb 400). Both adsorbents were used fresh and preloaded with COM peptides of molecular weight < 10 kDa at pH 5 and pH 8.5. It was found that the adsorption of COM peptides was higher at pH 5 compared to pH 8.5. Adsorption of ALA and TBA onto preloaded carbons was lower than adsorption onto fresh carbons. Significantly lower efficiency of ALA and TBA adsorption was observed at pH 5, which corresponded to greater adsorption of COM peptides at acidic pH. The peptides of MW 700, 900, 1300 and 1700 Da were identified as the COM components responsible for competition with herbicides.
Trvalý link: http://hdl.handle.net/11104/0210219