| Title |
Analysis of Optical Properties of Organic Carbon for Real-time Monitoring |
| Authors |
유영민 ( Youngmin You ) ; 박종관 ( Jongkwan Park ) ; 이병준 ( Byungjoon Lee ) ; 이승윤 ( Sungyun Lee ) |
| DOI |
https://doi.org/10.15681/KSWE.2021.37.5.344 |
| Keywords |
Dissolved organic carbon; Dissolved organic matter; Fluorescence spectra; Monitoring; UV254 |
| Abstract |
Optical methods such as UV and fluorescence spectrophotometers can be applied not only in the qualitative analysis of dissolved organic matter (DOM), but also in real-time quantitative DOM monitoring for wastewater and natural water. In this study, we measure the UV254 and fluorescence excitation emission spectra for a sewage treatment plant influent and effluent, and river water before and after sewage effluent flows into the river to examine the composition and origin of DOM. In addition, a correlation analysis between quantified DOM characteristics and dissolved organic carbon (DOC) was conducted. Based on the fluorescence excitation emission spectra analysis, it was confirmed that the protein-type tryptophan-like DOM was the dominant substance in the influent, and that the organic matter exhibited relatively more humic properties after biological treatment. However, DOM in river water showed the fluorescence characteristics of terrestrial humic-like and algal tyrosine-like (protein-like) organic matter. In addition, a correlation analysis was conducted between the DOC and optical indices such as UV254, the fluorescence intensity of protein-like and humic-like organic matter, then DOC prediction models were suggested for wastewater and river monitoring during non-rainfall and rainfall events. This study provides basic information that can improve the understanding of the contribution of DOC concentration by DOM components, and can be used for organic carbon concentration management in wastewater and natural water. |