EPA Leadership in the Global Mercury Partnership
The majority of mercury deposited in the United States is from global sources, including a combination of: natural sources (such as volcanoes); historically deposited mercury that is re-emitted to the atmosphere; and man-made emissions from a variety of sources, such as coal fired power plants, industrial processes, production of gold and other metals, and artisanal and small-scale gold mining.
The United Nations Environment Program (UNEP) Global Mercury Partnership Exit engages countries and stakeholders to reduce mercury use and releases of mercury to the environment. Work under the UNEP Global Mercury Partnership began in 2005. EPA is actively involved in the Partnership, working with governments and stakeholders to reduce mercury use and emissions.
This work has and will continue to make tangible improvements in the health of communities in many parts of the world, with seven active partnership areas:
- coal combustion,
- artisanal gold mining,
- mercury waste management,
- mercury supply and storage, and
- mercury air transport and fate research.
- Addressing Products Containing Mercury
- Reducing Mercury Emissions from Industrial Processes and Mining
- Reducing the Supply of Mercury in the Global Market
- Understanding the Movement of Mercury in the Atmosphere
Artisanal and Small Scale Gold Mining
- Download a report on the technology demonstration (PDF)(84 pp, 2.67 M, About PDF) Exit
Mercury is sometimes used in the chlor-alkali process, which refers to the manufacture of chlorine and caustic soda (lye). EPA leads the Mercury Use in Chlor-Alkali Partnership Area.
- EPA leads global work providing technical assistance and information exchange on non-mercury technologies, best practices, and management of surplus mercury.
- As part of this effort, EPA has assisted Russian chlorine producers in upgrading plant processes and equipment to reduce releases by almost 1 metric ton per year.
- EPA has also helped the Partnership create a global inventory of mercury-cell chlor-alkali facilities. Exit
- Learn more about Mercury Reduction in the Chlor-Alkali Sector.Exit
- EPA contributed to the planning and development of a comprehensive report Exiton the current status of the science in mercury air emissions, air modeling and air monitoring on a global scale.
- This effort, led by Italy, involved over 70 scientists from 12 countries.
In collaboration with various Russian institutes, the United Nations Environmental Program (UNEP) and the Swedish Environmental Institute, EPA recently concluded a multi-year program to demonstrate controlling mercury emissions using activated carbon injection technologies (both standard and brominated) at a Russian coal-fired power plant.
The technology works by injecting powdered activated carbon into the flue gas. This provides surface for oxidized gaseous mercury to absorb on the carbon particles, which are then removed by downstream control devices.
The testing was conducted by the All-Russia Thermal Engineering Institute and the Zelinsky Institute of Organic Chemistry, at the 300 MW Cherepetskaya plant. This plant burns Russian (i.e., Kuznetsk) coal. The testing showed that activated carbon injection (ACI) can result in up to 80 percent of the emissions captured. Brominated activated carbon can result in up to 90 percent captured (with a lower injection rate than ACI).
While this technology is currently being used by several U.S. plants, this is the first time such tests have been conducted in the Russian Federation.
Mercury Emissions Capture Efficiency with Activated Carbon Injection at a Russian Coal-Fired Thermal Power Plant, (PDF) Exit the project report, describes the project results and provides the testing results of the leaching potential of the associated waste residues (assuming their disposal in a landfill).
These results are potentially useful to all countries and organizations wanting to control mercury emissions from coal-fired power plants, including those planning for implementation of the Minamata Convention.