Hg Contamnation from New World Gold & Silver Mine Tailings
85
mercury from the tailings is the erosion of mercury-contaminated particles by
gravity, rain, storm events, and subsequent reworking of the deposits in river or
lake systems.
Terrestrial and aquatic vegetation on tailings deposits shows elevated mercury
levels. Indicator organisms like snails and mollusks reflect the mercury
concentrations in the tailings deposits.
It is expected that the use of mercury for gold and silver mining will continue
in the future in tropical areas. Unfortunately, although current information
shows an impact on the environment, little information is available on long-term
risk assessment in these areas, let alone on available measures to remediate or
contain the tailings.
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