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A comparison of the character of algal extracellular versus cellular organic matter produced by cyanobacterium, diatom and green alga
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SYSNO ASEP 0422041 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title A comparison of the character of algal extracellular versus cellular organic matter produced by cyanobacterium, diatom and green alga Author(s) Pivokonský, Martin (UH-J) SAI, ORCID, RID
Šafaříková, Jana (UH-J) RID
Barešová, Magdalena (UH-J) RID, ORCID, SAI
Pivokonská, Lenka (UH-J) SAI, ORCID, RID
Kopecká, Ivana (UH-J) SAI, RID, ORCIDSource Title Water Research. - : Elsevier - ISSN 0043-1354
Roč. 51, March (2014), s. 37-46Number of pages 10 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords Algal organic matter ; Extracellular organic matter ; Cellular organic matter ; Peptide/protein content ; Hydrophobicity ; Molecular weight fractionation Subject RIV BK - Fluid Dynamics OECD category Environmental sciences (social aspects to be 5.7) R&D Projects IAA200600902 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) Institutional support UH-J - RVO:67985874 UT WOS 000331681200004 EID SCOPUS 84891616283 DOI 10.1016/j.watres.2013.12.022 Annotation This study investigated characteristics of algal organic matter (AOM) derived from three species (cyanobacterium Microcystis aeruginosa, diatom Fragilaria crotonensis and green alga Chlamydomonas geitleri) which dominate phytoplanktonic populations in reservoirs supplying drinking water treatment plants. Algal growth was monitored by cell counting, optical density and dissolved organic carbon concentration measurements. Extracellular organic matter (EOM) released at exponential and stationary growth phases and cellular organic matter (COM) were characterised in terms of specific UV absorbance (SUVA), peptide/protein and non-peptide content, hydrophobicity and molecular weight (MW). It was found that both EOM and COM were predominantly hydrophilic with low SUVA. COM was richer in peptides/proteins, more hydrophilic (with about 89 % of hydrophilic fraction for all three species) and had lower SUVA than EOM. MW fractionation showed that both EOM and COM of all three species contain large portions of low-MW (< 1 kDa) compounds and high-MW (> 100 kDa) polysaccharides. Peptides/proteins exhibited narrower MW distribution than non-peptide fraction and it widened as the cultures grew. The highest amount of peptides/proteins with a significant portion of high-MW ones (22 %) was observed in COM of M. aeruginosa. The results imply that the knowledge of AOM composition and characteristics predetermine which processes would be effective in the treatment of AOM laden water. Workplace Institute of Hydrodynamics Contact Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003 Year of Publishing 2017
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