Toxicity Evaluation of Cyanogen Wastes and Antimony Smelting Alkali Wastes by Daphnia Magnet Straus
大型溞对氰法、锑冶炼碱渣的毒性评价

The toxicity test on solid wastes of cyanogen and antimony smelting alkali wastes with Daphnia magaa as test organism is introduced in this paper. The results show that the solid wastes of cyanogen and antimony smelting alkali wastes were toxic to the test organism. For cyanogen wastes, the EC50 values (median effective concentration) at exposure time of 24 hr, 48 hr and 96 hr were determined to be 7.5%, 0.24% and 0.167%, respectively. While for antimony smelting alkali wastes, the EC50 value at exposure time of 96 hr was found to be 89%. The LC50 for cyanogen wastes at 48 hr and 96 hr were calculated to be 0.43% and 0.19%, respectively. The results, show that the cyanogen wastes and antimony smelting alkali wastes were highly toxic to aquatic organisms. It should be indicated that Daphnia magna bioassay is a rapid and sensitive method in environmental toxicological studies.