| Effects of physical disturbance of sediment on the cycling of mercury in coastal regions | |
Wang, Wenjie; Wang, Yingjun ; Li, Yanbin; Song, Yue; Liu, Guangliang; Yin, Yongguang; Cai, Yong
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| 2022-09-10 | |
| Source Publication | SCIENCE OF THE TOTAL ENVIRONMENT
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| ISSN | 0048-9697 |
| Volume | 838Issue:0Pages:156298 |
| Abstract | Mercury (Hg) is a global pollutant of health concern due to formation and bioaccumulation of methylmercury (MeHg) during its biogeochemical cycle. Coastal areas are important regions in the biogeochemical cycling of Hg (Liu et al., 2017), where often-occurring natural and anthropogenic perturbations affect Hg transport and transformation and the associated health risk from Hg. The rapidly growing mariculture associated with the rising global demand for food may have a profound effect on coastal Hg cycling, due to the environmental alterations (e.g., resuspension and sedimentation) caused by maricultural activities (e.g., bottom sowing and harvesting). Through simulating the effect of water scouring, a common harvesting method, this study investigated Hg migration and distribution in particulate and dissolved phases in Laizhou Bay of Bohai Sea, China, where mariculture exists extensively. Particulate total and methyl Hg (PTHg and PMeHg) in water (expressed as ng/L) increased sharply due to the resuspension of sediment, but decreased rapidly after a one-off scouring event. When normalized by particle mass, PTHg and PMeHg (ng/g) in suspended sediment particles were significantly higher than that in the initial sediment, suggesting a higher distribution coefficient and higher affinity to bind Hg in the suspended particles. This may be due to the smaller particle sizes, and higher contents of organic matter and Fe/Mn of suspended sediments compared to the initial sediment. While the concentrations of dissolved THg (DTHg) in water column showed minimum changes or decreased, dissolved MeHg (DMeHg) concentrations increased sharply after the perturbation, due to the possible release of MeHg from porewater and potential Hg methylation during the event. These results provide fundamental information needed for ecological and health risk assessment of Hg in mariculture, and highlights the increased mobility and bioaccumulation of MeHg during anthropogenic perturbations in these areas. |
| Department | 环境纳米技术与健康效应重点实验室 ; 环境纳米技术与健康效应重点实验室 |
| Keyword | DISSOLVED ORGANIC-CARBON CONTAMINATED SEDIMENTS MARICULTURE SITES PEARL RIVER RESUSPENSION SPECIATION METHYLMERCURY ESTUARINE CHINA REMOBILIZATION |
| Document Type | 期刊论文 |
| Identifier | https://ir.rcees.ac.cn/handle/311016/47654 |
| Collection | 环境纳米技术与健康效应重点实验室 |
| Affiliation | 1.Shandong Univ, Sch Environm Sci & Engn, Shandong Key Lab Environm Proc & Hlth, Qingdao 266237, Peoples R China 2.Ocean Univ China, Frontiers Sci Ctr Deep Ocean Multispheres & Earth, Key Lab Marine Chem Theory & Technol, Minist Educ, Qingdao 266100, Peoples R China 3.Florida Int Univ, Dept Chem & Biochem, Miami, FL 33199 USA 4.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China |
| Recommended Citation GB/T 7714 | Wang, Wenjie,Wang, Yingjun,Li, Yanbin,et al. Effects of physical disturbance of sediment on the cycling of mercury in coastal regions[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2022,838(0):156298. |
| APA | Wang, Wenjie.,Wang, Yingjun.,Li, Yanbin.,Song, Yue.,Liu, Guangliang.,...&Cai, Yong.(2022).Effects of physical disturbance of sediment on the cycling of mercury in coastal regions.SCIENCE OF THE TOTAL ENVIRONMENT,838(0),156298. |
| MLA | Wang, Wenjie,et al."Effects of physical disturbance of sediment on the cycling of mercury in coastal regions".SCIENCE OF THE TOTAL ENVIRONMENT 838.0(2022):156298. |
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