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EAEE E4001 Industrial Ecology of Earth Resources: Material flows through the Economy and the Environment

EAEE E4001 Industrial Ecology of Earth Resources: Material flows through the Economy and the Environment. The Search for Cadmium. Origin of anthropogenic cadmium: Cadmium sulfide: CdS Recovered as by-product of zinc mining/production from cadmium sulfide: ZnS

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EAEE E4001 Industrial Ecology of Earth Resources: Material flows through the Economy and the Environment

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  1. EAEE E4001Industrial Ecology of Earth Resources:Material flows through the Economy and the Environment

  2. The Search for Cadmium Origin of anthropogenic cadmium: Cadmium sulfide:CdS Recovered as by-product of zinc mining/production from cadmium sulfide: ZnS Production ratio: 2.70 kg Cd/ton Zn

  3. Natural occurrence of cadmium Source: Boehm and Schaefers (1990)

  4. Potential for emissions during zinc production, g Cd/ton Zn: Roast/leach/electrowin: 0.2 Roast/blast furnace smelting: 50 (replaced in Canada and Europe) Roast/retort smelting: 100 (not in use any more)

  5. Average Cleaning Performance of Dust Arresters for Industrial Waste Gas Purification (mg dust/m3 clean gas) Technology 5 20 50 500 800 log (mg dust/m3 clean gas) Source: Güthner (1989), Swedish EPA (1991), Umweltbundesamt (1989).

  6. Potential for other Cd emissions Use/recycling of cadmium products: batteries, pigments, stabilizers, plating, cadmium compounds, alloys Cadmium in coal: 0.01-10 ppm (compare with mercury global averagein coal: 0.2 ppm) Cadmium in MSW: 3-15 ppm Fertilizers: 1-10 ppm

  7. Cadmium emissions in two great rivers, 1983-1987 Rhine River Basin: 28,800 kg/y (Klepper, Michaelis, Mahlau 1995) Hudson River Estuary : about 29,000 kg/y Only a coincidence!

  8. Atmospheric emissions of cadmium in the Rhine basin by industrial sector in 1988

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