Study on toxicity of wastewa ter from mining activities on some biota

Dawu River water was taken as the wastewater of copper mine and used to study its toxicity on algae and Daphnia It was found that wastewater affected the growth and photosynthesis of algae，and also affected the growth and breeding of Daphnia The results through SOS ch romotest showed that there was no appa rent genotoxins from the sediments.