Multi-pathway human exposure risk assessment using Bayesian modeling at the historically largest mercury mining district

Ecotoxicology and Environmental Safety
Samantha Jiménez-OyolaPablo Higueras

Abstract

The largest mercury (Hg) mining district in the world is located in Almadén (Spain), with well-known environmental impacts in the surrounding ecosystem. However, the impact of mercury on the health of the inhabitants of this area has not been documented accordingly. This study aims to carry out a probabilistic human health risk assessment using Bayesian modeling to estimate the non-carcinogenic risk related to Hg through multiple exposure pathways. Samples of vegetables, wild mushrooms, fish, soil, water, and air were analyzed, and adult residents were randomly surveyed to adjust the risk models to the specific population data. On the one hand, the results for the non-carcinogenic risk based on Hazard Quotient (HQ) showed unacceptable risk levels through ingestion of Hg-contaminated vegetables and fish, with HQ values 20 and 3 times higher, respectively, than the safe exposure threshold of 1 for the 97.5th percentile. On the other hand, ingestion of mushrooms, dermal contact with soil, ingestion of water, dermal contact with water and inhalation of air, were below the safety limit for the 97.5th percentile, and did not represent a risk to the health of residents. In addition, the probabilistic approach was compared with the con...Continue Reading

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Citations

Jun 3, 2021·International Journal of Environmental Research and Public Health·Sandra VisoPablo Higueras
Aug 10, 2020·Journal of Environmental Management·Fredy Guzmán-MartínezVirginia Rodríguez-Gómez
Aug 17, 2021·Ecotoxicology and Environmental Safety·Samantha Jiménez-OyolaPaola Romero

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