ABSTRACT
Deposited cadmium has been measured by determining cadmium in mosses (Ruhling, 1969, Ruhling and Tyler, 1970, and Olofsson, 1970). Figure 3:1 shows how the spreading of cadmium around a factory producing copper cadmium alloys can be determined by this technique. According to Ruhling and Tyler, concentrations of cadmium in moss in the more heavily industrialized and more densely populated south of Sweden were between 0.5 to 1 ppm (dry weight) whereas in the north, they were less than 0.2 ppm. The spread of cadmium from a cadmium-emitting factory can also be studied by determining cadmium in leaves from Morus shrubs (mulberry), as shown in Figure 3:2. These data are from an investigation by Kobayashi et al., 1969, (quoted by Yamagata and Shigematsu, 1970).
