Dynamics of Manganese,Cadmium,and Lead in Experimental Power Plant Ponds,

摘要

This study was designed to determine the effect of heated power plant cooling water on the compartmentalization of manganese,lead and cadmium in experimental ponds. Caged channel catfish and green sunfish were kept in an experimental pond and a control pond. Periodically,whole fishes,gill,heart,kidney,liver and musculature were analyzed for the three metals. Concentrations of the three metals in fishes were not affected by the temperature differential maintained during the study. There was no correlation in concentrations of cadmium and lead with age (weight and length) of fishes but manganese concentrations declined slightly with age. Aquatic organisms such as snails,fingernail clams, leeches, tubificid annelids and dragonfly nymphs exhibited concentrations of cadmium higher than sediments while snails and duckweed more closely reflected concentrations of manganese in sediments.