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Distributions of total mercury and methylmercury and regulating factors in lake water and surface sediment in the cold-arid Wuliangsuhai Lake region.
Cui, Zhimou; Shi, Xiaohong; Zhao, Shengnan; Lu, Junping; Tian, Zhiqiang; Zhang, Hao; Guo, Xin; Wang, Yanjun.
Afiliação
  • Cui Z; Water Conservancy and Civil Engineering College, Inner Mongolia Agricultural University, Hohhot, China.
  • Shi X; Water Conservancy and Civil Engineering College, Inner Mongolia Agricultural University, Hohhot, China. imaushixiaohong@163.com.
  • Zhao S; Water Resources Protection and Utilization Key Laboratory, Inner Mongolia Agricultural University, Hohhot, 010018, China. imaushixiaohong@163.com.
  • Lu J; Water Conservancy and Civil Engineering College, Inner Mongolia Agricultural University, Hohhot, China.
  • Tian Z; Water Resources Protection and Utilization Key Laboratory, Inner Mongolia Agricultural University, Hohhot, 010018, China.
  • Zhang H; Water Conservancy and Civil Engineering College, Inner Mongolia Agricultural University, Hohhot, China.
  • Guo X; Water Resources Protection and Utilization Key Laboratory, Inner Mongolia Agricultural University, Hohhot, 010018, China.
  • Wang Y; Water Conservancy and Civil Engineering College, Inner Mongolia Agricultural University, Hohhot, China.
Environ Geochem Health ; 45(11): 7999-8013, 2023 Nov.
Article em En | MEDLINE | ID: mdl-37523029
ABSTRACT
This study aimed to understand the occurrence of mercury in the water environment of typical cold and arid lakes and the regulating environmental factors. Water and surface sediment samples were collected from July to August, 2022 in the Wuliangsuhai Lake region for the analysis of total mercury (THg) and total methylmercury (TMeHg). Lake water THg and TMeHg ranged between 19.20 ~ 668.10 and 0.10 ~ 11.40 ng/L, respectively, exceeding China's environmental quality standards and contents of other lakes and reservoirs in China and other areas. Surface sediments showed lower mean THg and TMeHg of 261.85 and 0.18 µg/kg, respectively, with the former significantly exceeding the background value of Inner Mongolia and unpolluted natural lakes but lower than those of lakes affected by human factors, such as aquaculture. Sediments showed relatively low methylation and TMeHg (0.01-0.21%) concentrations. Correlation analysis identified salinity, total dissolved solids, conductivity, and redox potential as important factors affecting mercury speciation in water, whereas those in surface sediments were organic matter, pH, and total iron content. This study conducted preliminary research on the different species of Hg in Wuliangsuhai Lake water environment, which can provide scientific evidence for the specific treatment of Hg pollution in agriculture, or industry and other related fields. Our results suggest that upstream and downstream regulatory agencies should strengthen the regulation of agricultural and industrial production, moderately reduce human activities, and reduce the use of mercury-rich substances such as pesticides.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Mercúrio / Compostos de Metilmercúrio Tipo de estudo: Guideline / Prognostic_studies Limite: Humans País como assunto: Asia Idioma: En Ano de publicação: 2023 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Mercúrio / Compostos de Metilmercúrio Tipo de estudo: Guideline / Prognostic_studies Limite: Humans País como assunto: Asia Idioma: En Ano de publicação: 2023 Tipo de documento: Article