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Testing and modeling the influence of reclamation and control methods for reducing nonpoint mercury emissions associated with industrial open pit gold mines.
J Air Waste Manag Assoc ; 63(6): 681-93, 2013 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-23858994
ABSTRACT
Industrial gold mining is a significant source of mercury (Hg) emission to the atmosphere. To investigate ways to reduce these emissions, reclamation and dust and mercury control methods used at open pit gold mining operations in Nevada were studied in a laboratory setting. Using this information along with field data, and building off previous work, total annual Hg emissions were estimated for two active gold mines in northern Nevada. Results showed that capping mining waste materials with a low-Hg substrate can reduce Hg emissions from 50 to nearly 100%. The spraying of typical dust control solutions often results in higher Hg emissions, especially as materials dry after application. The concentrated application of a dithiocarbamate Hg control reagent appears to reduce Hg emissions, but further testing mimicking the actual distribution of this chemical within an active leach solution is needed to make a more definitive assessment.
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Coleções: Bases de dados internacionais Base de dados: MEDLINE Assunto principal: Poluentes Ambientais / Poluição Ambiental / Recuperação e Remediação Ambiental / Ouro / Mercúrio / Mineração País/Região como assunto: América do Norte Idioma: Inglês Revista: J Air Waste Manag Assoc Assunto da revista: Saúde Ambiental Ano de publicação: 2013 Tipo de documento: Artigo País de afiliação: Estados Unidos