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- Title
Fluorescence Characteristics and Sources of CDOM in Shaying River.
- Authors
LI Jialu; ZUO Qiting; FENG Feng; JIA Hongtao
- Abstract
Excitation-emission matrix spectroscopy combined with parallel factor analysis (EEMs-PARAFAC) was applied to investigate the composition, fluorescence intensities and possible sources of chromophoric dissolved organic matter (CDOM) in the overlying water of Shaying River, and the relationship between the fluorescence intensities of each component and the nutrients contents was discussed based on the correlation analysis. The results revealed that there were three fluorescence components in the CDOM of Shaying River, which were autogenic humus-like, terrestrial humus-like, and protein-like components, with the largest proportion of humus-like components. Spatially, the fluorescence intensities of humus-like components showed a trend of decreasing first and the increasing from upstream to downstream, while the protein-like components had the highest intensities in urban sampling site. The intensities of CDOM were affected by both autogenic and terrestrial sources, which were characterized by high humus and weak to moderately recent autologous source according to BIX and HIX. The sources of humus-like components and protein-like components were different. The decomposition of terrestrial humus-like components may cause the secondary pollution of phosphorus in the river. Protein-like components would likely affect the transportation and transformation process of nitrogen and phosphorus. CDOM was an important part of DOC, which can reflect the content of DOC through the fluorescence characteristics of CDOM.
- Subjects
DISSOLVED organic matter; FLUORESCENCE spectroscopy; FLUORESCENCE; RIVER pollution; FACTOR analysis
- Publication
Environmental Science & Technology (10036504), 2022, Vol 45, Issue 9, p90
- ISSN
1003-6504
- Publication type
Article
- DOI
10.19672/j.cnki.1003-6504.0723.22.338