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Methylmercury contamination in Mediterranean seafood: Exposure assessment and cost of illness implications.
Sci Total Environ
January 2025
Université Côte d'Azur, CNRS, ECOSEAS, France. Electronic address:
Methylmercury (MeHg) is a widespread contaminant that bioaccumulates in marine food webs, including those in the Mediterranean sea. It poses serious health risks, especially to developing infants and children, where exposure can cause neurological damage and developmental delays. In addition to health concerns, high MeHg levels in seafood can lead to economic losses through cognitive impairments that reduce productivity.
View Article and Find Full Text PDFToxicity comparison of polylactic acid and polyethylene microplastics co-exposed with methylmercury on Daphnia magna.
Mar Pollut Bull
December 2024
Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 16419, South Korea. Electronic address:
Article Synopsis
- Microplastics (MPs) in aquatic ecosystems are a major environmental issue due to their durability and potential harmful effects.
- Despite being marketed as eco-friendly, bioplastics like polylactic acid (PLA) have unclear toxicity levels.
- This study found that PLA-derived bio-microplastics harm Daphnia magna more severely than low-density polyethylene (LDPE) MPs, increasing pollutant accumulation and toxicity, which suggests they may pose greater environmental risks.
Regulation of straw-derived DOM and clay mineral complexation on mercury accumulation in vegetables.
Environ Res
November 2024
Key Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, Guiyang, 550025, China; College of Resources and Environmental Engineering, Guizhou University, Guiyang, 550025, China.
Article Synopsis
- The study investigates how dissolved organic matter (DOM) from straw affects mercury (Hg) dynamics in soil and plants, particularly focusing on its impact on methylmercury (MeHg) accumulation.
- Results show that straw-derived DOM increases MeHg levels in soil and water spinach, but humified DOM can reduce these levels significantly.
- Additionally, interactions between humified DOM and clay minerals (like montmorillonite) play a crucial role in either promoting or inhibiting Hg methylation and accumulation in plants.
Hydrogen sulfide improved learning and memory deficits by reversing the inhibition of methylmercuric chloride on BDNF/TrkB signaling pathway.
Neuro Endocrinol Lett
November 2024
Yancheng Hemiplegia Rehabilitation Engineering Technology Research Center, Jiangsu Medical College, Yancheng, 224005, China.
Objective: Methylmercuric chloride (MMC) has neurotoxicity, while hydrogen sulfide (H2S) has shown inhibitory properties against nerve damage induced by various factors. The study aimed to investigate the impact of H2S on MMC-induced learning and memory impairment in mice and to explore the underlying mechanisms.
Methods: A mouse model of learning and memory impairment was established by MMC gavage, and sodium hydrosulfide (NaHS) was used as an H2S donor for intervention.
Effects of combined application of Se and ammonium fertilizers on the growth and nutritional quality of maize in Hg-polluted soil under two irrigation conditions and its health risk assessment.
Chemosphere
November 2024
College of Resources and Environment, Shanxi Agricultural University, Taigu District, Jinzhong, 030801, Shanxi, China. Electronic address:
The interactive effects of Se (NaSeO) and ammonium fertilizers ((NH)SO and NHCl) on the growth and quality of maize (Zea mays L.) in mercury (Hg)-contaminated soil were studied under different water conditions. This study determined how two nutrient sources (Se and NH-N) interacted to improve the yield, quality, and safety of maize to ensure food security and quality assurance under the stress of heavy metal Hg.
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