Evaluación de las concentraciones de acetaminofén presentes en la Planta de Tratamiento de Aguas Residuales de la Universidad Pontificia Bolivariana-Seccional Bucaramanga y su efecto tòxico sobre el Allium Cepa

Abstract

At the end of XX century, scientists have been worried about increase of acetaminophen (ACE)consumption, that increase its concentration and toxic effects, due to concentration in sewage and rivers, springs. Aditionally, its frequency of disposal in urine and stool make to acetaminophen increase its presence in sewage of waste wáter treatment plants whose desing is based on organic matter remotion and solids, otherwise microorganisms and other nutrients in low grade, This investigation takes into account two stages: First, to be know (ACE) concentration, its relevant results are related to new knowledge, because PTAR UPB just only treatment system build in academyc institution in Floridablanca-Santader. Aditionally, final effluent is pourted in a Menzuly spring, for that reason to know is very important to know ecotoxicological influence.

The methodology based on High Performance Liquid Chromatography was used for the characterization of acetaminophen showed a precision with coefficient of variation between 0.3% -10%, recovery percentages between 92% -101%, detection limit of 20 ng /, the deviations between the low obtained values could be related to the influence of the matrix and pretreatment of the sample. The results showed acetaminophen concentrations between 460 ng / L and 80 ng / L in the tributary and effluent respectively. In the case of Reactor sludge, 5.2 mg / kg and Drying Beds of 3.4 mg / kg were obtained. The removal obtained in the plant by degradation varied between 88% and 91%, per 12% sore and 34.7% remain in the final effluent. Thus, drug removal processes are favored in the liquid phase and the solid phase adsorption phenomenon. The ecotoxicological evaluation of acetaminophen (Allium cepa method) threw values in the pure standard (45.34 ppm) and tablet (139.5 ppm), this indicates that the content of acetaminophen in the Effluent is not potentially toxic.