A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Atmospheric monomethylmercury: Inferred sources constrained by observations and implications for human exposure
Monomethylmercury (MMHg) is a potent neurotoxin that poses a threat to human health. MMHg cycles in all spheres of the Earth but the sources and fate of atmospheric MMHg are unclear. Here, we develop a global model for atmospheric MMHg, which integrates the presently available data and indicates the limitations of the current study. Constrained by the observations in the atmosphere, the global atmospheric MMHg from all sources is 1009 (205–2474 as an uncertainty range) Mg/yr, with the largest sources from the in-cloud methylation of divalent mercury (475 Mg/yr) and MMHg sea spray (395 Mg/yr). MMHg has a short lifetime of 1.9 days in the troposphere due to rapid photo-demethylation. Our model indicates a net loss of marine MMHg to the atmosphere and thus a detoxifying effect on MMHg contamination in marine fish. However, it suggests additional MMHg deposition to the land, particularly in densely populated coastal areas, introducing a new risk pathway that needs to be considered in mercury exposure assessment. The atmosphere plays a non-negligible role in the biogeochemical cycle and human health, which requires further study and consideration in implementing the global Minamata Convention.
Atmospheric monomethylmercury: Inferred sources constrained by observations and implications for human exposure
Monomethylmercury (MMHg) is a potent neurotoxin that poses a threat to human health. MMHg cycles in all spheres of the Earth but the sources and fate of atmospheric MMHg are unclear. Here, we develop a global model for atmospheric MMHg, which integrates the presently available data and indicates the limitations of the current study. Constrained by the observations in the atmosphere, the global atmospheric MMHg from all sources is 1009 (205–2474 as an uncertainty range) Mg/yr, with the largest sources from the in-cloud methylation of divalent mercury (475 Mg/yr) and MMHg sea spray (395 Mg/yr). MMHg has a short lifetime of 1.9 days in the troposphere due to rapid photo-demethylation. Our model indicates a net loss of marine MMHg to the atmosphere and thus a detoxifying effect on MMHg contamination in marine fish. However, it suggests additional MMHg deposition to the land, particularly in densely populated coastal areas, introducing a new risk pathway that needs to be considered in mercury exposure assessment. The atmosphere plays a non-negligible role in the biogeochemical cycle and human health, which requires further study and consideration in implementing the global Minamata Convention.
Atmospheric monomethylmercury: Inferred sources constrained by observations and implications for human exposure
Peipei Wu (author) / Zhengcheng Song (author) / Peng Zhang (author) / Shaojian Huang (author) / Tengfei Yuan (author) / Yanxu Zhang (author)
2024
Article (Journal)
Electronic Resource
Unknown
Metadata by DOAJ is licensed under CC BY-SA 1.0
Physicochemical factors affecting the spatial variance of monomethylmercury in artificial reservoirs
| Online Contents | 2015
Physicochemical factors affecting the spatial variance of monomethylmercury in artificial reservoirs
| Online Contents | 2016
Relation between mercury, monomethylmercury and selenium in the muscle of coastal Brazilian fishes
| British Library Online Contents | 2004
Quantifying Individual PM2.5 Exposure with Human Mobility Inferred from Mobile Phone Data
| DOAJ | 2023