Evaluation of Toxicity of Nirouchlor Corporation Wastewater on Poecilia reticulata

The main aim of this study is to determine of Nirouchlor wastewater’s LD50. Two set of experiments were conducted to determine LD50 of the wastewater for contact times of 48 and 96 hours. First, three aquariums were prepared, each containing 15 pieces of Poecilia reticulata, 10 liters of water having three different concentrations of wastewater. The Poecilia reticulata was preserved in aquariums for 48 hours. Then, the number of dead fishes for each wastewater concentration was counted, and mortality percentage was calculated for each wastewater concentration. Second, the same procedure was used for 96 hours. The results show that LD50 for contact times of 48 and 96 hours are equal of 0.48 and 0.3 mg/L, respectively. Comparing these results with LD50 of other chemicals shows that in case of releasing of Nirouchlor wastewater into the environment without enough treatment, it can kill a large number of aquatic creatures. It is elaborated that the Nirouchlor wastewater is very toxic for aquatic creatures. The results of this study can be useful to find out which dangers will threaten the environment in the case of releasing Nirouchlor wastewater without appropriate treatment.

کلیدواژه ها:

LD50 ، Poecilia reticulata ، Wastewater toxicity