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Methylmercury in commercial fish species from the Erhai Lake Basin, Southwest China: concentrations, health risk assessment, and implications for future monitoring.
Hu, Wenxian; Chen, Jingrui; Chao, Le; Kang, Bin; Sun, Jiachen.
Afiliação
  • Hu W; Erhai Watershed Ecological Environment Quality Testing Engineering Research Center of Yunnan Provincial Universities, Erhai Research Institute, West Yunnan University of Applied Sciences, Dali, CN-671006, China.
  • Chen J; College of Marine Life Sciences, Ocean University of China, Qingdao, CN-266003, China.
  • Chao L; College of Marine Life Sciences, Ocean University of China, Qingdao, CN-266003, China.
  • Kang B; Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, Qingdao, CN-266003, China.
  • Sun J; College of Marine Life Sciences, Ocean University of China, Qingdao, CN-266003, China. sunjiachen@ouc.edu.cn.
Environ Sci Pollut Res Int ; 31(45): 56473-56481, 2024 Sep.
Article em En | MEDLINE | ID: mdl-39269526
ABSTRACT
Erhai Lake, a highland lake situated in Southwest China, provides critical aquatic protein sources for the local community, and its preservation is vital due to the sensitivity of alpine freshwater ecosystems to disturbance. However, there is a lack of research on the contamination status of methylmercury (MeHg) in aquatic organisms of the Erhai Lake Basin. MeHg concentrations in important commercial fish species from the Erhai Lake were examined, and the potential health risks associated with human consumption were assessed. Our results showed significant inter-species differences in fish muscle MeHg the carnivorous S. asotus exhibited the highest level (303 ng/g; ww), while that of the detritivorous R. ocellatus was the lowest (3.86 ng/g). Moreover, MeHg concentrations in P. fulvidraco and C. auratus collected from the Luoshi River (a major tributary of Erhai Lake) were significantly higher compared to those from the Erhai Lake, indicating possible river-based input of MeHg into the Erhai Lake. Additionally, our study revealed a significant positive correlation between the MeHg levels and the length as well as weight of the examined fish species. All the fish species analyzed in our study had MeHg concentrations within the limits of China's food safety standard. Nevertheless, a relatively low consumption quantity of 16 g per day of certain species (i.e., S. asotus) may still pose potential health risks especially for children. The present study provides baseline data for MeHg monitoring and risk assessment in the Erhai Lake Basin, and warrants continued monitoring and source investigation.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Lagos / Monitoramento Ambiental / Peixes / Compostos de Metilmercúrio Idioma: En Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Lagos / Monitoramento Ambiental / Peixes / Compostos de Metilmercúrio Idioma: En Ano de publicação: 2024 Tipo de documento: Article