Estudio de parámetros físicos y químicos para evaluar la capacidad de autodepuración del río El Cinto, ubicado en la parroquia Lloa, cantón Quito, provincia de Pichincha

Abstract

The present research work deals with the study of the physical and chemical parameters of the self-purification of the El Cinto river, located in the parish of Lloa, whose objective was to determine the self-purification capacity in a section of the El Cinto river through physical-chemical analysis and bibliographic sources. It was determined that the self-purification capacity is one of the factors that influence water quality. For this reason, the parameters were analyzed at three points along the river, in the upper, middle and lower sections, where samples were taken in situ to obtain pH, temperature and dissolved oxygen. BOD5, COD, fecal coliforms and total suspended solids were analyzed in the laboratory. The present methodology from the book "Standard Methods for the examination of water and wastewater" was used to obtain the procedures for each of the parameters studied, as well as to identify the characteristics of the river and the study area, such as flow, length, depth and the activities carried out near the river, which were presented in a statistical analysis with the Rstudio program to determine the significant differences between the concentrations on the sampling days. The results show that some parameters such as pH, temperature, dissolved oxygen are within the criteria of water quality for human and domestic consumption which is found in the environmental quality standard mentioned above, since the results concluded that the remaining parameters are under the quality criteria, in this case the concentrations of dissolved oxygen have a self-purification capacity which with the increase in temperature can be affected in its concentration.