Influence of peptides and proteins produced by cyanobacterium Microcystis aeruginosa on the coagulation of turbid waters

0393896 - ÚH 2014 RIV GB eng J - Článek v odborném periodiku
Šafaříková, Jana - Barešová, Magdalena - Pivokonský, Martin - Kopecká, Ivana
Influence of peptides and proteins produced by cyanobacterium Microcystis aeruginosa on the coagulation of turbid waters.
Separation and Purification Technology. Roč. 18, October (2013), s. 49-57. ISSN 1383-5866. E-ISSN 1873-3794
Grant CEP: GA ČR GAP105/11/0247
Výzkumný záměr: CEZ:AV0Z20600510
Institucionální podpora: RVO:67985874
Klíčová slova: Cellular organic matter (COM) * Coagulation * Microcystis aeruginosa * Peptides/proteins * Turbidity removal
Kód oboru RIV: BK - Mechanika tekutin
Impakt faktor: 3.065, rok: 2013
http://www.sciencedirect.com/science/article/pii/S1383586613004152

The study investigated the influence of cellular peptides and proteins derived from cyanobacterium Microcystis aeruginosa on the coagulation of kaolin particles during water treatment. To describe the coagulation mechanisms, coagulation system constituents (peptides/proteins, kaolin and coagulant) were characterized in terms of their surface charges. The removal mechanisms of peptides/proteins and kaolin were evaluated by the comparison of the coagulation tests performed with and without coagulant (ferric or aluminum sulfate). We confirmed the peptide/protein inhibiting effect on coagulation through the formation of dissolved complexes with coagulants at a pH value of about 6 for Fe and a pH value of about 6.8 for Al. On the other hand, we demonstrated that cyanobacterial peptides/proteins also have positive effects as they induce the coagulation of hydrophobic kaolin particles within the pH range 4–6 for Fe and 5–6.5 for Al. Interestingly, when peptides/proteins bear a sufficiently low amount of negative charge (pH < 4.5), they can coagulate with kaolin by means of electrostatic interactions even in the absence of a coagulant. The study showed that peptides/proteins produced by M. aeruginosa can serve as coagulation aids and contribute to the turbidity removal at pH values below neutral (pH < 6 for Fe and pH < 6.5 for Al).
Trvalý link: http://hdl.handle.net/11104/0225851