Characterization of organic pollution in the Dianchi Caohai Lake at the transition between the dry and rainy seasons
Dianchi Caohai Lake is heavily polluted, and a significant increase in chemical oxygen demand (COD) occurs during the transition from the dry season to the rainy season. In order to analyze the cause of COD increase, the compositional characteristics of organic matter were investigated using three-d...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2024-01-01
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| Series: | Water Cycle |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666445324000035 |
| _version_ | 1797305224916893696 |
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| author | Hongfa Guo Zhuo Chen Han Yan Ao Xu Fengmin Li |
| author_facet | Hongfa Guo Zhuo Chen Han Yan Ao Xu Fengmin Li |
| author_sort | Hongfa Guo |
| collection | DOAJ |
| description | Dianchi Caohai Lake is heavily polluted, and a significant increase in chemical oxygen demand (COD) occurs during the transition from the dry season to the rainy season. In order to analyze the cause of COD increase, the compositional characteristics of organic matter were investigated using three-dimensional fluorescence spectroscopy technology. The results showed that the most polluted area was located in the geographic center of the outer Caohai Lake, where COD reached 29 mg/L and was elevated by 52%, and protein-like and humus-like features were evident in the organic matter fractions. By measuring the characteristics of water in Caohai Lake, it was found that the fluorescence indexes were greater than 2.47, the biological index was distributed between 0.67 and 1.06, and the humification index was distributed between 1.81 and 3.12. It indicated that the lake had low humification and showed strong autochthonous source characteristics. The bloom outbreak was one of the main reasons for the elevated COD concentration. This study will provide theoretical support for the control of organic pollution in Dianchi Lake. |
| first_indexed | 2024-03-08T00:22:50Z |
| format | Article |
| id | doaj.art-57959ee480694f2787aa57cf4f17bacc |
| institution | Directory Open Access Journal |
| issn | 2666-4453 |
| language | English |
| last_indexed | 2024-03-08T00:22:50Z |
| publishDate | 2024-01-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Water Cycle |
| spelling | doaj.art-57959ee480694f2787aa57cf4f17bacc2024-02-16T04:30:14ZengKeAi Communications Co., Ltd.Water Cycle2666-44532024-01-0153136Characterization of organic pollution in the Dianchi Caohai Lake at the transition between the dry and rainy seasonsHongfa Guo0Zhuo Chen1Han Yan2Ao Xu3Fengmin Li4Sanya Oceanographic Institution, Ocean University of China, Sanya, 572000, China; Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing, 100084, ChinaEnvironmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing, 100084, China; Beijing Laboratory for Environmental Frontier Technologies, Beijing, 100084, ChinaEnvironmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing, 100084, ChinaResearch Institute for Environmental Innovation (Suzhou), Tsinghua University, Suzhou, 215163, ChinaSanya Oceanographic Institution, Ocean University of China, Sanya, 572000, China; Corresponding author.Dianchi Caohai Lake is heavily polluted, and a significant increase in chemical oxygen demand (COD) occurs during the transition from the dry season to the rainy season. In order to analyze the cause of COD increase, the compositional characteristics of organic matter were investigated using three-dimensional fluorescence spectroscopy technology. The results showed that the most polluted area was located in the geographic center of the outer Caohai Lake, where COD reached 29 mg/L and was elevated by 52%, and protein-like and humus-like features were evident in the organic matter fractions. By measuring the characteristics of water in Caohai Lake, it was found that the fluorescence indexes were greater than 2.47, the biological index was distributed between 0.67 and 1.06, and the humification index was distributed between 1.81 and 3.12. It indicated that the lake had low humification and showed strong autochthonous source characteristics. The bloom outbreak was one of the main reasons for the elevated COD concentration. This study will provide theoretical support for the control of organic pollution in Dianchi Lake.http://www.sciencedirect.com/science/article/pii/S2666445324000035Caohai lakeWater bloom outbreakOrganic pollutionChemical oxygen demandThree-dimensional fluorescence |
| spellingShingle | Hongfa Guo Zhuo Chen Han Yan Ao Xu Fengmin Li Characterization of organic pollution in the Dianchi Caohai Lake at the transition between the dry and rainy seasons Water Cycle Caohai lake Water bloom outbreak Organic pollution Chemical oxygen demand Three-dimensional fluorescence |
| title | Characterization of organic pollution in the Dianchi Caohai Lake at the transition between the dry and rainy seasons |
| title_full | Characterization of organic pollution in the Dianchi Caohai Lake at the transition between the dry and rainy seasons |
| title_fullStr | Characterization of organic pollution in the Dianchi Caohai Lake at the transition between the dry and rainy seasons |
| title_full_unstemmed | Characterization of organic pollution in the Dianchi Caohai Lake at the transition between the dry and rainy seasons |
| title_short | Characterization of organic pollution in the Dianchi Caohai Lake at the transition between the dry and rainy seasons |
| title_sort | characterization of organic pollution in the dianchi caohai lake at the transition between the dry and rainy seasons |
| topic | Caohai lake Water bloom outbreak Organic pollution Chemical oxygen demand Three-dimensional fluorescence |
| url | http://www.sciencedirect.com/science/article/pii/S2666445324000035 |
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