30 August 2014
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Inhibition of the algal bloom by dissolution of limestone

Author(s): H. S. Kim, S. K. Lee & G. Kim

Limestone is one of the well-known insoluble salts.

Yet it is a possible source of both calcium ions and carbonate ions which might act as an inhibitor of algal bloom in a lake.

The calcium ions may drive the flocculation of algae by double layer suppression, while the carbonate ions may accelerate the seclusion of phosphate from a lake ecosystem by helping formation of sparingly soluble salts between phosphate and calcium ions.

Therefore, in the lake of which the catchments area is rich in limestone, there seems to be a rare chance of algal bloom.

There is evidence which supports the correctness of this hypothesis. In this paper comparison will be made for the water quality data of two man made lakes in Korea.

Occurrence of the algal bloom has been observed every year for one lake, while it has not happened at all for the other lake, even though the water quality of both lakes is very much alike except for water hardness and alkalinity.

The cause of the difference in the algal bloom occurrence is interpreted as a consequence of the difference in the hardness and alkalinity.

The authors believe that this finding will serve for the effective lake management for the purpose of algal growth control.

algal bloom, limestone, lake management, hardness, alkalinity.

1 Introduction:
Eutrophication is one of the major concerns in lake water quality management. The implication of the processes for phosphorus removal and denitirfication in the wastewater treatment facilities is to endeavour to stop or retard the eutrophication of the receiving water body like lake or littoral area. Eutrophication means the abundance of nutrients like phosphorus and nitrogen necessary for the growth of algae [1].

If the eutrophication continues for ...

Pages: 9
Size: 527 kb
Paper DOI: 10.2495/WRM050171



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Water Resources Management III

Water Resources Management III

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