Environmental Engineering Reference
In-Depth Information
Figure 1.Types and sources of Cadmium Wastes.
2.2. Liquid Cadmium Waste
Asdiscussed earlier,themain industries producingcadmiumwaste are: (1)
protective plating on steel, (2) various alloys, (3) pigments, (4) stabilizers, and
(5) nickel-cadmium batteries and are, in many countries, discharged to the
sewage system. The countries without a sewage network presumably dispose
of these wastes to adjacent watercourses or to specific disposal areas. In the
case of product disposal, all cadmium-containing articles can enter the
municipal waste disposal pathway where they will be either landfilled or
incinerated (Hutton et al., 1987). Cadmium is also found in drinking water
supplies as a result of deterioration of galvanized plumbing, along with
industrial waste contamination, or surface water contamination by certain
fertilizers.
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