delayed chlorophyll fluorescence

COPPER ION BIOAVAILABILITY IN WATERS OF VARIOUS ORIGIN

The toxic effect of copper ions upon a test culture of alga chlorella in natural (the Yenisei and Kacha rivers), waste and tap water (the Krasnoyarsk city) was estimated. It has been found that the copper toxicity in samples of these waters can greatly reduce. This toxicity reduction, which differed highly in the samples examined, could be caused by binding of potential toxic substances by some compounds in the waters. In natural water, the binding capacity and bioavailability of toxicants vary through seasons.