Mercury contamination in alligators (Melanosuchus niger) from Mamirauá Reservoir (Brazilian Amazon) and human health risk assessment

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• 作者：Jozélia Correia (1)
  Ricardo Cesar (2)
  Eliane Marsico (3)
  George Tadeu Nunes Diniz (4)
  Mauricio Camargo Zorro (5)
  Zuleica Castilhos (2)
  
• 关键词：Mercury ; Alligator ; Risk ; Human health ; Brazilian Amazon
• 刊名：Environmental Science and Pollution Research
• 出版年：2014
• 出版时间：December 2014
• 年：2014
• 卷：21
• 期：23
• 页码：13522-13527
• 全文大小：348 KB
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• 作者单位：Jozélia Correia (1)
  Ricardo Cesar (2)
  Eliane Marsico (3)
  George Tadeu Nunes Diniz (4)
  Mauricio Camargo Zorro (5)
  Zuleica Castilhos (2)
  
  1. Instituto de Saúde e Produ??o Animal, Universidade Federal Rural da Amaz?nia, Belém, PA, Brazil
  2. Centro de Tecnologia Mineral - CETEM/MCTI, Rio de Janeiro, RJ, Brazil
  3. Departamento de Tecnologia dos Alimentos, Universidade Federal Fluminense, Niterói, RJ, Brazil
  4. Centro de Pesquisas Ageu Magalh?es - CPqAM, Recife, PE, Brazil
  5. Instituto Federal de Educa??o em Ciência e Tecnologia do Pará -IFPA Campus, Belém, PA, Brazil
  
• ISSN：1614-7499

文摘

Mercury (Hg) concentrations in muscles of wild alligators (Melanosuchus niger) from the Mamirauá Reservoir (a reference area in the Brazilian Amazon) and the human health risks associated with its consumption were assessed. The mean Hg concentration in alligator muscles was 0.407?±-.114?μg/g (N--1). Close to 5?% of the muscle samples showed Hg levels above the World Health Organization guideline for fish consumption (0.5?μg/g). A positive and significant relationship was observed between Hg concentrations in muscle and the age of the specimens. The dose-response approach suggests that close to 27.4?years is required for half of the exposed specimens to attain 0.5?μg/g. The hazard quotient (HQ) is a risk indicator which defines the ratio of exposure level and a toxicological reference dose. HQ resulted above the unity for all the specimens when the ingestion rate for riverine communities (200?g of muscle per day) is considered, indicating the existence of hazard. When the ingestion rate for market consumers (28.57?g/day) is considered, the risks are much lower (mean HQ--.55), suggesting that such group is not at risk. The establishment of local and regional ingestion rates for riverine populations and market consumers is extremely recommended.