Chronic toxicity of major ions to Ceriodaphia dubia

摘要

From the study, the order of strength of toxicity on single chemical substance was depend on its concentration, when the concentration was change, the order will be changed. When it comes to interaction of binary substances, when two kinds of chemical substances, the toxicity of mixture were not increase all the time, sometimes the toxicity will be decreased and sometimes the toxicity will be increased seriously.