Demanda de oxigeno por sedimentos en diferentes tramos del río Negro Rionegro, Antioquia, Colombia
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Date
2017
Journal Title
Journal ISSN
Volume Title
Publisher
Corporación Universitaria Lasallista
Abstract
Introduction. The main objective of this work was
to determine the Sediment Oxygen Demand (SOD)
in four different sections of the Rio Negro (Rionegro,
Antioquia) during three climatic seasons in 2014 (dry
and rainy seasons and a transition phase). Materials
and Methods. The sediment samples were taken
using an Ekman dredger. Analysis of moisture and
organic matter content of the samples was performed
later in the laboratory. The measurement of the
benthic oxygen demand was made based on the Batch
technique. Likewise, at each monitoring point, using
a multiparameter sensor, the following environmental
variables were measured: pH, conductivity, dissolved
oxygen, saturation percentage and temperature.
Results. It is worth highlighting the behavior of SOD
in the Puente Autopista station, where low values of
this variable were obtained, ranging from 0.05 - 0.15
g O2
*m2
/day. This contrasts with other environmental
variables in the same station, such as dissolved oxygen
and saturation percentage, whose results were also
reported as very low. For the other stations the values
ranged from 0.09 - 0.25 g O2
*m2
/day, which are typical
demands of sediments with low content of organic
material. Conclusions. This study found that the
results obtained for SOD measurement are low when
compared to similar national and international-level
studies. Additionally, other environmental variables
such as pH, temperature and conductivity remained in
the typical range of values for mountainous streams.
Description
Keywords
Corporación Universitaria Lasallista, Área Metropolitana del Valle de Aburrá, Calidad del agua, Contaminación del agua, Río Negro (Antioquia), Demanda de oxígeno, Sedimentos
Citation
Revista Producción + Limpia Vol. 12 N. 2