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Removal of Microcystis blooms using enhanced colony formation and buoyancy by controlling extracellular polysaccharides and cation concentrations
This study attempted to promote the colony formation and enlarge the colony size of wild Microcystis strain by adjusting extracellular polysaccharides and cationic ion concentrations in culture medium, and then, using the enhanced floating velocity (Stokes’ law), wild Microcystis at the water surfac...
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Published in: | International journal of environmental science and technology (Tehran) 2019-08, Vol.16 (8), p.4793-4802 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | This study attempted to promote the colony formation and enlarge the colony size of wild
Microcystis
strain by adjusting extracellular polysaccharides and cationic ion concentrations in culture medium, and then, using the enhanced floating velocity (Stokes’ law), wild
Microcystis
at the water surface was removed. In order to examine the difference between extracellular polysaccharides mixture and tightly cell-bound extracellular polysaccharides used in this study, the component composition and physical properties were also examined. The results showed that tightly cell-bound extracellular polysaccharides contained the greater amounts of cations (Ca
2+
and Mg
2+
), phosphorus, carboxy group and monosaccharides than extracellular polysaccharides mixture. There were greater amounts of carboxy groups and mannose residue in tightly cell-bound extracellular polysaccharides than extracellular polysaccharides mixture, which would contribute to the stronger cell–cell adhesion of wild
Microcystis
to make colony formation and expand colony size. The adjustment of extracellular polysaccharides and cationic ion concentrations was effective method to promote the colony formation and enlarge the colony size of wild
Microcystis
, and that the control of
Microcystis
buoyancy by enhancing the colony size would be one of the options for the suppression of
Microcystis
blooms from the viewpoint of cost-effective, low-energy, environmentally-friendly, and non-destructive of
Microcystis
cells. |
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ISSN: | 1735-1472 1735-2630 |
DOI: | 10.1007/s13762-019-02289-4 |