Toxicity assays applied to wastewater of 10[th] of Ramadan industrial city, Egypt

ABSTRACT

The toxic impact of wastewater of 10[th] of Ramadan industrial city [Egypt] on the receiving water body was investigated. Both algal and fish bioassay procedures were applied to the raw and treated wastewaters. In case of raw wastewater the EC50 [96 hours] for the green algae [Scenedesmus obliquus], the diatoms [Nitzschia linearis] and blue green algae [Oscillatoria limnetica] amounted to 29%, 36% and 41%, respectively. In case of Tilapia fish [Oreochromis niloticus]; the LC50 [96 hours] amounted to 13.9%. Treated wastewater did not show toxic effects on algal cultures or Nile Tilapia fish. Exposure of the fish to the raw wastewater induced an increase in the serum content of glucose, AST, ALT activities, creatinine and uric acid compared to the control