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Zinc global atmosphere, emissions

Fig. 4 Global metal emissions to the atmosphere by region (tonnes/year) for arsenic (As), cadmium (Cd), mercury (Hg) and molybdenum (Mo) (a) chromium (Cr), copper (Cu) and manganese Mn (b) nickel (Ni), lead (Pb), vanadium (V) and zinc (Zn) (c) and antimony (Sb), selenium (Se), tin (Sn) and thallium (Tl) (d) (data from Pacyna and Pacyna 2001)... Fig. 4 Global metal emissions to the atmosphere by region (tonnes/year) for arsenic (As), cadmium (Cd), mercury (Hg) and molybdenum (Mo) (a) chromium (Cr), copper (Cu) and manganese Mn (b) nickel (Ni), lead (Pb), vanadium (V) and zinc (Zn) (c) and antimony (Sb), selenium (Se), tin (Sn) and thallium (Tl) (d) (data from Pacyna and Pacyna 2001)...
Cadmium is widely distributed in the earth s crust at an average concentration of about 0.1-0.2 mg/kg and is commonly found in association with zinc. Volcanic activity is major natural source of cadmium release to the atmosphere. The annual global flux from this source has been estimated to be 820 tons. Deep sea volcanism is also a source of environmental cadmium release, but the role of this process in the global cadmium cycle remains to be quantified (OECD, 1994). About 10-15% of total airborne cadmium emissions arise from natural processes (WHO, 1992a). [Pg.88]

See other pages where Zinc global atmosphere, emissions is mentioned: [Pg.2499]    [Pg.285]    [Pg.138]    [Pg.304]    [Pg.475]    [Pg.121]    [Pg.151]    [Pg.417]   
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