Significant impacts of river inputs on the distributions and transports of mercury and methylmercury in nearshore and open seas – Simulation based on field surveys and mass balance modeling
Rivers are important sources of Hg for adjacent seas, and seafood from nearshore waters is a major source of Hg exposure for humans. There is thus a key scientific concern regarding how much riverine Hg inputs influence Hg loads in nearshore waters as well as how far the impact range can extend from...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-10-01
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| Series: | Environment International |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0160412023004890 |
| _version_ | 1797659889434099712 |
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| author | Chenghao Yu Huiming Lin Junming Guo Mao Peng Maodian Liu Yindong Tong Yifan Lu Xuejun Wang Xiangliang Pan |
| author_facet | Chenghao Yu Huiming Lin Junming Guo Mao Peng Maodian Liu Yindong Tong Yifan Lu Xuejun Wang Xiangliang Pan |
| author_sort | Chenghao Yu |
| collection | DOAJ |
| description | Rivers are important sources of Hg for adjacent seas, and seafood from nearshore waters is a major source of Hg exposure for humans. There is thus a key scientific concern regarding how much riverine Hg inputs influence Hg loads in nearshore waters as well as how far the impact range can extend from the river to the open sea. In addition, it is important to understand the influence of anthropogenic hydro-facilities and activities on Hg levels in downstream seas. Because of the concise mass exchange pattern between the seas and the previously demonstrated intensive Hg inputs under anthropogenic regulation from the Yellow River, the Bohai and Yellow Seas, which are key fishery and marine breeding areas for China, are an ideal research area for exploring the impacts of riverine Hg on nearshore and adjacent open seas. Field surveys were conducted in eight major rivers and two seas, and 433 water samples were collected. The main Hg input and output terms (rivers, ocean currents, underground discharge, sewage, coastal erosion, atmospheric deposition, surface evasion, sedimentation, and fisheries) were quantified in the Bohai and Yellow Seas. Owing to the high inputs from the Yellow and Yalu Rivers, elevated THg concentrations were found. Apart from direct MeHg discharge, riverine nutrients may also seemingly affect nearshore MeHg. Using mass balance models, we found that the Yellow River (9.8 t) was the dominant Hg source in the Bohai Sea, which accounted for more than half of all contributions, and the Bohai Sea played the role of a secondary source of Hg to the Yellow Sea, with a flux of 3.3 t. Anthropogenic hydro-activities in large rivers could significantly influence Hg outputs and loads in the nearshore and even open seas. This study provides useful information for water resource management applications to reduce potential MeHg risks. |
| first_indexed | 2024-03-11T18:22:44Z |
| format | Article |
| id | doaj.art-0edee588c6d548b28853e402032b6567 |
| institution | Directory Open Access Journal |
| issn | 0160-4120 |
| language | English |
| last_indexed | 2024-03-11T18:22:44Z |
| publishDate | 2023-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Environment International |
| spelling | doaj.art-0edee588c6d548b28853e402032b65672023-10-15T04:36:30ZengElsevierEnvironment International0160-41202023-10-01180108216Significant impacts of river inputs on the distributions and transports of mercury and methylmercury in nearshore and open seas – Simulation based on field surveys and mass balance modelingChenghao Yu0Huiming Lin1Junming Guo2Mao Peng3Maodian Liu4Yindong Tong5Yifan Lu6Xuejun Wang7Xiangliang Pan8Ministry of Education Key Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China; Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, ChinaMinistry of Education Key Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, ChinaState Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences (CAS), Lanzhou 730000, ChinaKey Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, ChinaMinistry of Education Key Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, ChinaSchool of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China; College of Ecology and Environment, Tibet University, Lhasa 850000, ChinaZhejiang Construction Investment Environment Engineering Co., Ltd., Hangzhou 310014, ChinaMinistry of Education Key Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China; Corresponding authors at: Ministry of Education Laboratory of Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China. Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China.Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China; Corresponding authors at: Ministry of Education Laboratory of Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China. Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China.Rivers are important sources of Hg for adjacent seas, and seafood from nearshore waters is a major source of Hg exposure for humans. There is thus a key scientific concern regarding how much riverine Hg inputs influence Hg loads in nearshore waters as well as how far the impact range can extend from the river to the open sea. In addition, it is important to understand the influence of anthropogenic hydro-facilities and activities on Hg levels in downstream seas. Because of the concise mass exchange pattern between the seas and the previously demonstrated intensive Hg inputs under anthropogenic regulation from the Yellow River, the Bohai and Yellow Seas, which are key fishery and marine breeding areas for China, are an ideal research area for exploring the impacts of riverine Hg on nearshore and adjacent open seas. Field surveys were conducted in eight major rivers and two seas, and 433 water samples were collected. The main Hg input and output terms (rivers, ocean currents, underground discharge, sewage, coastal erosion, atmospheric deposition, surface evasion, sedimentation, and fisheries) were quantified in the Bohai and Yellow Seas. Owing to the high inputs from the Yellow and Yalu Rivers, elevated THg concentrations were found. Apart from direct MeHg discharge, riverine nutrients may also seemingly affect nearshore MeHg. Using mass balance models, we found that the Yellow River (9.8 t) was the dominant Hg source in the Bohai Sea, which accounted for more than half of all contributions, and the Bohai Sea played the role of a secondary source of Hg to the Yellow Sea, with a flux of 3.3 t. Anthropogenic hydro-activities in large rivers could significantly influence Hg outputs and loads in the nearshore and even open seas. This study provides useful information for water resource management applications to reduce potential MeHg risks.http://www.sciencedirect.com/science/article/pii/S0160412023004890MercuryMethylmercuryRiverNearshore SeaOpen Sea |
| spellingShingle | Chenghao Yu Huiming Lin Junming Guo Mao Peng Maodian Liu Yindong Tong Yifan Lu Xuejun Wang Xiangliang Pan Significant impacts of river inputs on the distributions and transports of mercury and methylmercury in nearshore and open seas – Simulation based on field surveys and mass balance modeling Environment International Mercury Methylmercury River Nearshore Sea Open Sea |
| title | Significant impacts of river inputs on the distributions and transports of mercury and methylmercury in nearshore and open seas – Simulation based on field surveys and mass balance modeling |
| title_full | Significant impacts of river inputs on the distributions and transports of mercury and methylmercury in nearshore and open seas – Simulation based on field surveys and mass balance modeling |
| title_fullStr | Significant impacts of river inputs on the distributions and transports of mercury and methylmercury in nearshore and open seas – Simulation based on field surveys and mass balance modeling |
| title_full_unstemmed | Significant impacts of river inputs on the distributions and transports of mercury and methylmercury in nearshore and open seas – Simulation based on field surveys and mass balance modeling |
| title_short | Significant impacts of river inputs on the distributions and transports of mercury and methylmercury in nearshore and open seas – Simulation based on field surveys and mass balance modeling |
| title_sort | significant impacts of river inputs on the distributions and transports of mercury and methylmercury in nearshore and open seas simulation based on field surveys and mass balance modeling |
| topic | Mercury Methylmercury River Nearshore Sea Open Sea |
| url | http://www.sciencedirect.com/science/article/pii/S0160412023004890 |
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