Mercury Emission Inventory
The total emission volume of mercury into air from anthropogenic and natural sources in Japan was estimated to be 22 - 31 tons in 2005 based on a report by Kida et al.(2007)14 and data provided by related industries (see Table 9).
In the combustion sector, the major contributors were coal-fired power plants, oil burning industrial boilers and the incineration of medical waste, sewage sludge and other industrial waste. In the manufacturing sector, primary ferrous metal production, non-ferrous metal production and cement production were estimated to be major contributors. Material Flow of Mercury
The MOE has prepared a material flow of mercury to clarify the flow of mercury in human society,
including the use of mercury for production activities and the discharge of mercury to air, water and soil.
Fig. 23 shows the material flow of mercury in Japan using the values observed from 2002 to 2006.
According to this figure, some 82.4 tons of mercury were imported as a constituent of such raw materials as
coal, oil and mining ore with some 1 ton of mercury was imported as a constituent of products. Some 4.5
tons were further imported as elemental mercury. Meanwhile, the domestic demand for mercury for
products was 12.6 tons. Some 108 tons of mercury were exported as elemental mercury and some 2.2 tons
of mercury were exported as a constituent of products.
The above figures mean that the supply volume of mercury through recovery, etc. is larger than the
domestic demand, resulting in the export of surplus mercury. As international discussions will be further
promoted on the reduction of international trade in mercury and on the storage of surplus mercury, it is
currently planned to discuss desirable mechanisms for mercury recovery and long-term storage or disposal
in Japan.
Mercury Emission Inventory
The total emission volume of mercury into air from anthropogenic and natural sources in Japan was estimated to be 22 - 31 tons in 2005 based on a report by Kida et al.(2007)14 and data provided by related industries (see Table 9).
In the combustion sector, the major contributors were coal-fired power plants, oil burning industrial boilers and the incineration of medical waste, sewage sludge and other industrial waste. In the manufacturing sector, primary ferrous metal production, non-ferrous metal production and cement production were estimated to be major contributors. Material Flow of Mercury
The MOE has prepared a material flow of mercury to clarify the flow of mercury in human society,
including the use of mercury for production activities and the discharge of mercury to air, water and soil.
Fig. 23 shows the material flow of mercury in Japan using the values observed from 2002 to 2006.
According to this figure, some 82.4 tons of mercury were imported as a constituent of such raw materials as
coal, oil and mining ore with some 1 ton of mercury was imported as a constituent of products. Some 4.5
tons were further imported as elemental mercury. Meanwhile, the domestic demand for mercury for
products was 12.6 tons. Some 108 tons of mercury were exported as elemental mercury and some 2.2 tons
of mercury were exported as a constituent of products.
The above figures mean that the supply volume of mercury through recovery, etc. is larger than the
domestic demand, resulting in the export of surplus mercury. As international discussions will be further
promoted on the reduction of international trade in mercury and on the storage of surplus mercury, it is
currently planned to discuss desirable mechanisms for mercury recovery and long-term storage or disposal
in Japan.
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