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2015 ; 12
(9
): 10755-82
Nephropedia Template TP
gab.com Text
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Mercury Exposure Assessment and Spatial Distribution in A Ghanaian Small-Scale
Gold Mining Community
#MMPMID26340636
Rajaee M
; Long RN
; Renne EP
; Basu N
Int J Environ Res Public Health
2015[Sep]; 12
(9
): 10755-82
PMID26340636
show ga
Mercury is utilized worldwide in artisanal and small-scale gold mining (ASGM) and
may pose a risk for miners and mining communities. While a number of studies have
characterized mercury in ASGM communities, most have focused on a single media
and few have taken a holistic approach. Here, a multiple media exposure
assessment and cross-sectional study of mercury was conducted in 2010 through
2012 in northeast Ghana with a small-scale gold mining community, Kejetia, a
subsistence farming community, Gorogo, and an urban ASGM gold refinery in
Bolgatanga. The objective was to assess mercury in a range of human (urine and
hair) and ecological (household soil, sediment, fish, and ore) samples to
increase understanding of mercury exposure pathways. All participants were
interviewed on demographics, occupational and medical histories, and household
characteristics. Participants included 90 women of childbearing age and 97 adults
from Kejetia and 75 adults from Gorogo. Median total specific gravity-adjusted
urinary, hair, and household soil mercury were significantly higher in Kejetia
miners (5.18 µg/L, 0.967 µg/g, and 3.77 µg/g, respectively) than Kejetia
non-miners (1.18 µg/L, 0.419 µg/g, and 2.00 µg/g, respectively) and Gorogo
participants (0.154 µg/L, 0.181 µg/g, and 0.039 µg/g) in 2011. Sediment, fish,
and ore Hg concentrations were below guideline values. Median soil mercury from
the Bolgatanga refinery was very high (54.6 µg/g). Estimated mean mercury
ingestion for Kejetia adults from soil and dust exceeded the U.S. Environmental
Protection Agency reference dose (0.3 µg Hg/kg·day) for pica (0.409 µg Hg/kg·day)
and geophagy (20.5 µg Hg/kg·day) scenarios. Most participants with elevated
urinary and household soil mercury were miners, but some non-miners approached
and exceeded guideline values, suggesting a health risk for non-mining residents
living within these communities.