| an assessment of chemical and physical parameters, several contaminants including metals, and toxicity in the seven major wastewater treatment plants in the state of aguascalientes, mexico. | forty-eight hours acute toxicity tests were employed with daphnia magna and lecane quadridentata to assess the influents and effluents of the seven most important wastewater treatment plants (wtp) in the state of aguascalientes, mexico, during the 2006 dry and rainy seasons. the wtp of the city of aguascalientes treated 1948 ls(-1). the remaining six plants treated wastewater in the range from 28 to 93 ls(-1). plants efficiently removed toxicity when daphnia magna was used as a model organism, b ... | 2010 | 20390835 |