Optical properties of riverine dissolved organic matter and influence of precipitation - a case study

The study aimed to determine the optical characteristics of dissolved organic matter (DOM) from two rivers with different pollution sources, using fluorescence spectroscopy and spectrophotometry, two highly sensitive and selective optoelectronic methods. Results showed that the release of wastewater effluent in Ciorogarla River changed the optical properties of riverine DOM and its relationship with standard parameters. It was also found that Sabar River samples presented high DOM concentrations and an accumulation of autochthonous matter towards mid-autumn. Although the study was performed on specific rivers, the knowledge that was obtained could be used as reference for other aquatic systems.