2,6-二硝基甲苯对鲤鱼的毒性

The Toxicity Effect of 2,6-DNT on Carp

研究测定了２，６－二硝基甲苯（２，６－ＤＮＴ）对鲤鱼的急性和亚致死毒性．亚致死试验经１８０ｍｇ／Ｌ、３６０ｍｇ／Ｌ、５４０ｍｇ／Ｌ、７２０ｍｇ／Ｌ、９９０ｍｇ／Ｌ２，６－ＤＮＴ暴露２１ｄ．在１５℃～１９℃下，２４ｈ、４８ｈ、７２ｈ、９６ｈ的半致死浓度值分别为２５４８ｍｇ／Ｌ、２２９６ｍｇ／Ｌ、２０１２ｍｇ／Ｌ、１９００ｍｇ／Ｌ．亚致死试验中，根据２，６－ＤＮＴ对鲤鱼生长和肝、肾、鳃ＡＴＰａｓｅ活力的影响，求得２，６－ＤＮＴ的最大允许毒物浓度为１８０～３６０ｍｇ／Ｌ．

The purpose of this study is to determine the acute and sublethal toxicity of 2,6-Dinitrotoluene on carp( Cyprinus-carpio ). Carp was exposed to 2,6-DNT at the concentrations of 1.80 mg/L,3.60 mg/L,5.40 mg/L,7.20 mg/L,9.90 mg/L for 21 days. The 24h,48h, 72h and 96h LC 50 values carp to this chemical were 25.48 mg/L,22.96 mg/L,20.12 mg/L and 19.00 mg/L at 15℃～19℃, respectively. With regard to the sublethal toxicity,the maximum allowable toxicant concentration (MATC) of 2,6-DNT to carp was 1.80～3.60 mg/L based on its toxic effects on the growth and ATPase activity of brain, liver, kidney and gill of this species.