Due to inefficiencies in ore processing, some ASGM tailings contain significant amounts of unrecovered gold and may subsequently be reprocessed to recover it. Using cyanide to extract remaining gold from ASGM tailings to which mercury has been added without first removing the mercury is one of the worst practices as defined by Annex C of the Minamata Convention on Mercury.
read more... https://www.planetgold.org/tales-mercury-containing-tailings
No comments:
Post a Comment