大型溞对氰法、锑冶炼碱渣的毒性评价

采用大型溞为试验生物对氰渣、锑冶炼碱渣进行毒性试验研究.结果表明,氰渣、锑冶炼碱渣能够抑制大型溞的运动,并造成溞的大量死亡.所测得的半数运动受抑制浓度EC_(50)值,氰渣24h为7.5％,48h及96h分别为0.24％,锑冶炼碱渣96hEC_(50)值为98％.所测得的半数致死浓度LC_(50)值,48及96h分别为0.43％及0.19％.

Toxicity Evaluation of Cyanogen Wastes and Antimony Smelting Alkali Wastes by Daphnia Magnet Straus

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.