Evaluation and effect of coexisting heavy metals on river ecosystem considering attached algae and water insects

通过室内实验研究了共存重金属对水虫和附着藻生存的影响。获得了Epeorus中Al、Cu和Cd的LC_<50>值。Cu和Cd共存时，在毒性等量时表现为拮抗作用，在毒性高量时表现为协同作用。多核羟基铝加速了古硅藻和绿藻的腐烂。研究了共存的两种金属（Al、Zn、Cu、Cd）对藻类的毒性。

The effects of coexisting heavy metals on the survival of water insect and attached algae were investigated in the laboratory experiments. The LC_<50> values of Al, Cu and Cd for Epeorus were obtained. Coexisting Cu and Cd showed an antagonistic effect in low toxicity equivalence quantity and synergistic effect in high quantity. Polynuclear hydroxyl-Al accelerated the decay of Nizschia palea (diatom) and Chlorella vulgaris (green algae). The toxicity of coexisting two metals (Al, Zn, Cu or Cd) to algae was demonstrated.