AOX漂白废水对黑鲷鱼卵及仔鱼的毒性效应

Toxicity of AOX Bleaching Effluent to Eggs and Larvae of Sparus macrocephalus

用含AOX的造纸漂白废水对人工养殖的黑鲷鱼卵和早期仔鱼进行了毒性实验．结果表明：对于AOX漂白废水的毒性，黑鲷鱼卵胚胎阶段比早期仔鱼阶段更为敏感．高浓度的AOX漂白废水对鱼卵孵化产生一定的抑制作用，对仔鱼产生尾部畸形和致死现象，鱼卵孵化的EC50和95％置信区间分别为0．018和0～0．087mL／mL；仔鱼72h LC50和96h LC50分别为0．557和0．774mL／mL，72h的LOEC和NOEC分别为0．032和0．001mL／mL，96h的LOEC和NOEC分别为0．003和0．001mL／mL．表明仔鱼对AOX漂白废水的毒性敏感性随着时间的推移而逐渐减弱．

The sub-acute toxicity test was conducted for CEH bleaching effluent containing AOX upon eggs and larvae of Sparus macrocephalus. Results showed that for the toxicity of CEH bleaching effluent, eggs in embryo stage are more sensitive than larvae in early stage. High-concentration bleaching effluent inhibited the development of embryo and caused larvae abnormality and even death. The incubation ECso of effluent was 0.018 mL/mL, with 95% confidence level of 0 - 0.087 mL/mL. The larvae 72 h LCso and 96 h LC50 of effluent were 0.557 and 0.774 mL/mL respectively. The no observed effect concentration （NOEC） of effluent to larvae of 72 h and 96 h was 0.001 mL/mL, and the lowest no observed effect concentration （LOEC） of effluent upon 72 h and 96 h was 0.032 and 0.003 mL/mL, respectively. It showed that larvae sensitivity to the toxicity of bleaching effluent became weaken as time continued.