Cabot Norit Activated Carbon signed a contract to provide its Darco Hg family of activated carbon products to a large power generator in the United States. The contract for Cabot Corp., Boston, will help the utility meet state regulations for mercury emissions.

 Mercury is released into boiler flue gas when coal is burned to generate electricity. The toxicity and persistence of mercury in emissions from coal-fired power plants has caused many state environmental agencies to establish regulatory controls on flue gas emissions. In addition, the U.S. Environmental Protection Agency has promulgated federal mercury emission levels in the Mercury and Air Toxics Standard that will take effect April 2015. Activated carbon has proven to be an effective component of emission control systems to reduce mercury emissions.