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Yan Z, Zhang H, Li Y, Lu Z, Wang D, Zhao X, Wang S, Xie R, Li K. Seasonal distribution of caffeine in the Bohai Sea, Yellow Sea, and estuaries of Yantai City, China. MARINE POLLUTION BULLETIN 2024; 199:116008. [PMID: 38171162 DOI: 10.1016/j.marpolbul.2023.116008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 12/26/2023] [Accepted: 12/27/2023] [Indexed: 01/05/2024]
Abstract
We employed a validated method to assess the seasonal variation and distribution of caffeine in the Bohai and Yellow Seas, as well as in Yantai urban estuaries and offshore region in northern China. Caffeine concentrations were highest during the summer in the Yellow Sea (1436.4 ng/L) and lowest in the Yantai urban offshore region during the spring and autumn and in the Yantai urban estuarine area and Bohai Sea during the winter (0.1 ng/L). There was significant variation in maximum caffeine levels among seasons across all regions examined, reaching a difference of 5980.5 times at the same sampling site between summer and winter. The caffeine concentration in the Yantai offshore region was significantly higher than in the Bohai and Yellow Seas. This study is the first investigation of seasonal fluctuations in the pollution levels of neurotoxic substances in the northern seas of China.
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Affiliation(s)
- Zhi Yan
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; School of Ocean, Yantai University, Yantai 264005, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hui Zhang
- Yantai Affiliated Hospital of Binzhou Medical University, Yantai 264100, China
| | - Yaxi Li
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
| | - Zhen Lu
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
| | - Derui Wang
- College of Marine Science, Beibu Gulf University, Qinzhou 535011, China
| | - Xiaodong Zhao
- School of Ocean, Yantai University, Yantai 264005, China
| | - Song Wang
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, Lianyungang 222005, China
| | - Ruliang Xie
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, Lianyungang 222005, China
| | - Ke Li
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China.
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