Trace Elements Mercury

Concern over environmental effects of trace elements emissions, specifically cadmium, chromium, copper, mercury, nickel, lead, selenium, and zinc, from human activities has led to the introduction of legislation on emissions in many countries; however, this legislation sets limits for medical waste incinerators, municipal solid waste combustors, and hazardous waste incinerators [53]. Trace element emissions from coal combustion are not currently regulated. An overview of mercury regulations in the European Union, Japan, and the United States reveals a variety of different approaches [54]. The 1998 United Nations Protocol on Heavy Metals set emissions limits for hazardous and municipal waste incinerators and directed signatories to the protocol to set limits for medical waste incinerators. The European Union has approved the protocol, and the United States has accepted but not ratified it. Separate from the United Nations protocol, the European Council issued a directive in 1996 ordering limit values and alert thresholds for a variety of air pollutants including mercury [54]. The directive resembles

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