원문정보
초록
영어
In the summer, to avoid propagation of green algae bloom. Copper sulfate was scattered on reservoir. The copper leads to damage fluidity and permeability of the membrane by combining with cell membrane temporarily. Nutrient salts eluted by the sediment of polluted reservoir, as important nutrient source of algae, caused sudden breeding of green algae, and which also exacerbate reservoir by generating toxic materials.(1) It was changed the concentration of
Copper(Ⅱ) sulfate pentahydrate in 0~3 μg/ml using Scenedesumus. sp. of the fresh water algae in this study and measured a cell number, OD, a change of the time of the chlorophyl content, and LC50(72hr). As a result, LC50 was calculated 2.35 μg/ml and predicted no effects concentration (PNEC) of 23.5 ng/ml is derived and considers fact water system environment for applying uncertainty calculation 100. It was detected in 0.051~0.167 mg/l as for the copper
of the cavity water of the reservoir (Dongbok) sedimentation layer2) and detected in 0.021~0.110 mg/l (2007) as for the copper concentration of reservoir (Dongbok) outer layer. The toxicity was predicted based on experimantal results, the copper toxocity could influenced to benthos of sedimental layer and outer layer organism, but the stability evaluation for the fact water ecosystem must be examined more concretely.