Seasonal and Spatial Variations in the Optical Characteristics of Dissolved Organic Matter in the Huma River Basin, China
Dissolved organic matter (DOM) plays a central role in the global carbon cycle. The Huma River Basin (HRB) in China is affected by humic substances in its forests with high background values. DOM in the HRB was studied using spectroscopic techniques combined with statistical analysis in order to bet...
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MDPI AG
2023-04-01
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| Online Access: | https://www.mdpi.com/2073-4441/15/8/1579 |
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| author | Daoping Zhang Fansheng Meng Yeyao Wang Lingsong Zhang Hao Xue Zhuming Liang Jiasheng Zhang |
| author_facet | Daoping Zhang Fansheng Meng Yeyao Wang Lingsong Zhang Hao Xue Zhuming Liang Jiasheng Zhang |
| author_sort | Daoping Zhang |
| collection | DOAJ |
| description | Dissolved organic matter (DOM) plays a central role in the global carbon cycle. The Huma River Basin (HRB) in China is affected by humic substances in its forests with high background values. DOM in the HRB was studied using spectroscopic techniques combined with statistical analysis in order to better understand its characteristics in natural waters affected by humic substances in forests. UV-visible parameters showed that the DOM predominantly consisted of aromatic and high-molecular-weight natural organic matter. Fluorescence excitation-emission matrix (EEM) spectroscopy-parallel factor analysis (PARAFAC) recognized four characteristic components, representing humic-like substances (C1, C2, and C3) and protein-like substances (C4). Fluorescence parameters showed that the allochthonous terrestrially-derived DOM had a humic character. Fourier transform infrared (FT-IR) spectra characterized the structure of DOM, containing aromatic, aliphatic, carbohydrate, and protein compounds. Principal component analysis (PCA) revealed that humic-like components explained approximately 86.7% of the total variance, suggesting that terrestrial humic-like substances were dominant in the HRB. Correlation coefficient matrix analysis indicated that COD<sub>Mn</sub> and DOC were mainly derived from humic-like substances. The results demonstrated that the background value in the HRB was mainly attributed to terrestrial humic-like substances. Such knowledge could assist in monitoring and managing rivers with high background values. |
| first_indexed | 2024-03-11T04:26:34Z |
| format | Article |
| id | doaj.art-d61573b909854990ab50533847cb8f29 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-11T04:26:34Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-d61573b909854990ab50533847cb8f292023-11-17T21:49:06ZengMDPI AGWater2073-44412023-04-01158157910.3390/w15081579Seasonal and Spatial Variations in the Optical Characteristics of Dissolved Organic Matter in the Huma River Basin, ChinaDaoping Zhang0Fansheng Meng1Yeyao Wang2Lingsong Zhang3Hao Xue4Zhuming Liang5Jiasheng Zhang6School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, ChinaResearch Center of Environmental Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, ChinaChina National Environmental Monitoring Centre, Beijing 100012, ChinaResearch Center of Environmental Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, ChinaResearch Center of Environmental Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, ChinaResearch Center of Environmental Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, ChinaResearch Center of Environmental Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, ChinaDissolved organic matter (DOM) plays a central role in the global carbon cycle. The Huma River Basin (HRB) in China is affected by humic substances in its forests with high background values. DOM in the HRB was studied using spectroscopic techniques combined with statistical analysis in order to better understand its characteristics in natural waters affected by humic substances in forests. UV-visible parameters showed that the DOM predominantly consisted of aromatic and high-molecular-weight natural organic matter. Fluorescence excitation-emission matrix (EEM) spectroscopy-parallel factor analysis (PARAFAC) recognized four characteristic components, representing humic-like substances (C1, C2, and C3) and protein-like substances (C4). Fluorescence parameters showed that the allochthonous terrestrially-derived DOM had a humic character. Fourier transform infrared (FT-IR) spectra characterized the structure of DOM, containing aromatic, aliphatic, carbohydrate, and protein compounds. Principal component analysis (PCA) revealed that humic-like components explained approximately 86.7% of the total variance, suggesting that terrestrial humic-like substances were dominant in the HRB. Correlation coefficient matrix analysis indicated that COD<sub>Mn</sub> and DOC were mainly derived from humic-like substances. The results demonstrated that the background value in the HRB was mainly attributed to terrestrial humic-like substances. Such knowledge could assist in monitoring and managing rivers with high background values.https://www.mdpi.com/2073-4441/15/8/1579Huma River Basin (HRB)dissolved organic matter (DOM)UV-visible absorption spectroscopyexcitation-emission matrix (EEM) spectroscopy-parallel factor analysis (PARAFAC)Fourier transform infrared (FT-IR) spectroscopystatistical analysis |
| spellingShingle | Daoping Zhang Fansheng Meng Yeyao Wang Lingsong Zhang Hao Xue Zhuming Liang Jiasheng Zhang Seasonal and Spatial Variations in the Optical Characteristics of Dissolved Organic Matter in the Huma River Basin, China Water Huma River Basin (HRB) dissolved organic matter (DOM) UV-visible absorption spectroscopy excitation-emission matrix (EEM) spectroscopy-parallel factor analysis (PARAFAC) Fourier transform infrared (FT-IR) spectroscopy statistical analysis |
| title | Seasonal and Spatial Variations in the Optical Characteristics of Dissolved Organic Matter in the Huma River Basin, China |
| title_full | Seasonal and Spatial Variations in the Optical Characteristics of Dissolved Organic Matter in the Huma River Basin, China |
| title_fullStr | Seasonal and Spatial Variations in the Optical Characteristics of Dissolved Organic Matter in the Huma River Basin, China |
| title_full_unstemmed | Seasonal and Spatial Variations in the Optical Characteristics of Dissolved Organic Matter in the Huma River Basin, China |
| title_short | Seasonal and Spatial Variations in the Optical Characteristics of Dissolved Organic Matter in the Huma River Basin, China |
| title_sort | seasonal and spatial variations in the optical characteristics of dissolved organic matter in the huma river basin china |
| topic | Huma River Basin (HRB) dissolved organic matter (DOM) UV-visible absorption spectroscopy excitation-emission matrix (EEM) spectroscopy-parallel factor analysis (PARAFAC) Fourier transform infrared (FT-IR) spectroscopy statistical analysis |
| url | https://www.mdpi.com/2073-4441/15/8/1579 |
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