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Research article2017Peer reviewed

Mercury Human Exposure in Populations Living Around Lake Tana (Ethiopia)

Habiba, G.; Abebe, G.; Bravo, Andrea G.; Ermias, D.; Staffan, A.; Bishop, K.

Abstract

A survey carried out in Lake Tana in 2015 found that Hg levels in some fish species exceeded internationally accepted safe levels for fish consumption. The current study assesses human exposure to Hg through fish consumption around the Lake Tana. Of particular interest was that a dietary intake of fishes is currently a health risk for Bihar Dar residents and anglers. Hair samples were collected from three different groups: anglers, college students and teachers, and daily laborers. A questionary includes gender, age, weight, activity. Frequency of fish consumption and origin of the eaten fish were completed by each participant. Mercury concentrations in hair were significantly higher (P value < 0.05) for anglers (mean +/- standard deviation 0.120 +/- 0.199 mu g/g) than college students (mean +/- standard deviation 0.018 +/- 0.039 mu g/g) or daily workers (mean +/- standard deviation 16 +/- 9.5 ng/g). Anglers consumed fish more often than daily workers and college group. Moreover, there was also a strong correlation (P value < 0.05) between the logarithms of total mercury and age associated with mercury concentration in scalp hair. Mercury concentrations in the hair of men were on average twice the value of the women. Also, users of skin lightening soap on a daily basis had 2.5 times greater mercury in scalp hair than non-users. Despite the different sources of mercury exposure mentioned above, the mercury concentrations of the scalp hair of participants of this study were below levels deemed to pose a threat to health.

Keywords

Bihar Dar; Fish; Hair; Mercury; Occupation; Residents

Published in

Biological Trace Element Research
2017, Volume: 175, number: 2, pages: 237-243

      SLU Authors

      • Associated SLU-program

      Non-toxic environment
      Lakes and watercourses

      Sustainable Development Goals

      SDG5 Achieve gender equality and empower all women and girls
      SDG2 End hunger, achieve food security and improved nutrition and promote sustainable agriculture

      UKÄ Subject classification

      Environmental Management
      Ecology

      Publication identifier

      DOI: https://doi.org/10.1007/s12011-016-0745-9

      Permanent link to this page (URI)

      https://res.slu.se/id/publ/81234