Laboratory-Scale Investigations of Algal Toxin Removal by Water Treatment

摘要

The paper describes some water-treatment processes which have been investigated on a laboratory and pilot- plant sale for their effectiveness in removing toxic algal cells and the dissolved toxins microcystin-LR and anatoxin-a. Oxidation with ozone or potassium perman- ganate, or treatment by biological activated carbon, were found to be the most effective processes for removal of the dissolved toxins. Chlorination was effective only for the removal of microcystin-LR. Toxins, contained within algal cells, could be removed effectively by coagulation, carification and filtration under suitable conditions. Consideration of the structure and properties of micro- Cystin variants suggests that treatments which are Suitable for removal of microcystin-LR and antoxin-a Should be suitable for removal of other microcystins.