Mercury hair levels and factors that influence exposure for residents of Huancavelica, Peru
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Between 1564 and 1810, nearly 17,000 metric tons of mercury (Hg) vapor was released to the environment during cinnabar refining in the small town of Huancavelica, Peru. The present study characterizes individual exposure to mercury using total and speciated Hg from residential samples, total Hg in hair, and self-reported questionnaire data regarding factors influencing exposure (e.g., frequency of fish consumption, occupation). Total Hg concentrations in hair from 118 participants ranged from 0.10 to 3.6 µg/g, similar to concentrations found in the USA and lower than concentrations in other Hg-exposed populations around the world. Pearson’s correlation coefficients for data in this study suggest that there is a positive correlation between concentrations of total Hg in hair and concentrations of total Hg in adobe bricks, dirt floors, and surface dust; however, these correlations are not statistically significant. Results of a one-way analysis of variance (ANOVA) identified that total Hg concentrations in hair were significantly related to gender (p < 0.001), living in a neighborhood where smelters were previously located (p = 0.021), smoking status (p = 0.003), frequency of house cleaning (p = 0.019), and frequency of fish consumption (p = 0.046). These results highlight the need for further studies to better characterize Hg exposure in Huancavelica, particularly as related to residential contamination. A comprehensive analysis of residential Hg contamination and exposure in Huancavelica will guide the development and implementation of mitigation and remediation strategies in the community to reduce potential health risks from residential Hg exposure.
KeywordsAdobe Hair Health Mercury Soil
- Nuttall, K. L. (2006). Interpreting hair mercury levels in individual patients. Annals of Clinical and Laboratory Science, 36, 248–261.Google Scholar
- Robins, N. A. (2011). Mercury, mining, and empire, the human and ecological costs of colonial silver mining in the Andes. Indiana: Indiana University Press.Google Scholar
- Robins, N. A., Hagan, N., Halabi, S., Hsu-Kim, H., Gonzales, R. D. E., Morris, M., et al. (2012). Estimations of historical atmospheric mercury concentrations from mercury refining and present-day soil concentrations of total mercury in Huancavelica, Peru. Science of the Total Environment, 426, 146–154.CrossRefGoogle Scholar
- UNEP (United Nations Environment Programme). (2008). Guidance for Identifying Populations at Risk from Mercury Exposure. Geneva Switzerland:UNEP DTIE Chemicals Branch and WHO Department of Food Safety, Zoonoses, and Boodborne Diseases. Available: http://www.who.int/foodsafety/publications/chem/mercuryexposure.pdf. Accessed 9 Sep 2013.
- US EPA (US Environmental Protection Agency). (2002). US EPA Method 1631, Revision E: Mercury in Water by Oxidation, Purge and Trap, Cold Vapor Atomic Fluorescence Spectrometry. Washington, DC:Office of Water. Available: http://water.epa.gov/scitech/methods/cwa/metals/mercury/upload/2007_07_10_methods_method_mercury_1631.pdf. Accessed Nov 2011.
- US EPA (US Environmental Protection Agency). (2008a). Method 30B – Determination of Total Vapor Phase Mercury Emissions from Coal-Fired Combustion Sources Using Carbon Sorbent Traps. Available: http://www.epa.gov/ttn/emc/methods/method30B.html. Accessed April 2012.