模拟印染废水对菲律宾蛤仔的毒性作用

Toxic Effects of Simulated Printing and Dyeing Wastewater on Ruditapes philippinarum

摘要: 为有效评价印染废水对海洋生物的毒性效应和代谢作用影响，本研究以菲律宾蛤仔(Ruditapes philippinarum)为受试生物，以不同浓度的亚甲基蓝溶液模拟印染废水，试验采用静水法分别研究其对菲律宾蛤仔的24 h急性毒性效应和9 h内对菲律宾蛤仔的呼吸代谢影响，以期为印染废水排放相关标准的制定提供参考。急性毒性研究表明：模拟印染废水对菲律宾蛤仔24 h的半数致死浓度LC₅₀为8.56 mg/L。呼吸代谢研究表明：亚甲基蓝浓度与菲律宾蛤仔的耗氧率成反比，水体中氨氮含量随着时间的推移越来越高，相同时间段水体中的氨氮含量随着亚甲基蓝的浓度增加而增加。

Abstract: To evaluate the toxicity effect and metabolic effect of printing and dyeing wastewater to marine life, the 24 h acute toxicity tests and 9 h static respiratory metabolism tests were conducted with Ruditapes philippinarum, exposing under different concentration of methylene blue solution which represented simulated printing and dyeing wastewater, in order to provide a reference for the establishment of printing and dyeing wastewater discharge standards. The 24 h acute toxicity tests showed that the lethal concentration of 50% (LC₅₀) was 8.56 mg/L concerning simulated printing and dyeing wastewater to the Ruditapes philippinarum. Respiratory metabolism study showed that the concentration of methylene blue was inversely proportional to the oxygen consumption rate of Ruditapes philippinarum, while ammonia nitrogen content in the water got higher along with time variation, and ammonia nitrogen content increased with increasing concentration of methylene blue during the same periods in the water.