Integrated survey of water pollution in the Suquía River basin

MAGDALENA V MONFERRAN; LUCAS N GALANTI; ROCIO I BONANSEA; MARÍA VALERIA AMÉ; DANIEL A WUNDERLIN

ROYAL SOC CHEMISTRY

Año: 2011 vol. 13 p. 398 - 398

e report a combined two-year seasonal monitoring of Suquýa River basin using both chemical parameters and biomarkers measured in Jenynsia multidentata, aiming to correlate external levels of contaminants with the response of oxidative stress biomarkers in this fish. Identified pollution sources correspond to city sewage as well as agricultural and small industry activities downstream from Cordoba city. Physicochemical parameters integrated into a water quality index (WQI) were measured in Suquýa River during dry and wet seasons. Ag, Mn, Cu, Cr, Ni, Fe, Pb and Zn were also monitored in water and sediment samples. Biomarkers include detoxication and antioxidant enzymes: catalase(CAT), glutathione peroxidase (GPX), glutathione S-transferase (GST) and glutathione reductase (GR). Enzymes showed a pollution dependent response, with increased activities in fish collected close to the sewage exit and progressive drop further downstream, matching changes in the Water Quality index. The combine