Document Detail

Mercury and methylmercury in fish and human hair from the Tapajós river basin, Brazil.
MedLine Citation:
PMID:  8560242     Owner:  NLM     Status:  MEDLINE    
Mercury is being released in the Amazon in an abusive way due to goldmining activities. The Tapajós river basin was the first to be intensively exploited in the modern Amazon gold rush. Fish and hair samples as the best indicators of human methylmercury contamination were investigated in the main cities and villages along the Tapajós river basin. The upper basin has typical fish fauna with much larger carnivorous fish with higher mercury levels reaching an average value of 0.69 microgram.g-1 wet wt. in 43 fish. This was accompanied by high levels in hair of the human population living in the same area. The maximum hair value reach 151 micrograms.g-1 dry wt. with two villages presenting an average value close to 25 micrograms.g-1 dry wt. An analytical laboratory intercalibration exercise was performed between Japanese and Brazilian laboratories for total mercury analysis. Critical fish, areas, and more exposed human groups are identified.
O Malm; F J Branches; H Akagi; M B Castro; W C Pfeiffer; M Harada; W R Bastos; H Kato
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Science of the total environment     Volume:  175     ISSN:  0048-9697     ISO Abbreviation:  Sci. Total Environ.     Publication Date:  1995 Dec 
Date Detail:
Created Date:  1996-02-23     Completed Date:  1996-02-23     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0330500     Medline TA:  Sci Total Environ     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  141-50     Citation Subset:  IM    
Laboratório de Radioisótopos Eduardo Penna Franca, Instituto de Biofisica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro (UFRJ), CCS, Ilha do Fundão, Brasil.
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MeSH Terms
Food Contamination
Fresh Water
Hair / chemistry*
Mercury / analysis*
Methylmercury Compounds / analysis*
Water Pollutants, Chemical / analysis*
Reg. No./Substance:
0/Methylmercury Compounds; 0/Water Pollutants, Chemical; 7439-97-6/Mercury; 7440-57-5/Gold

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