Components of plastic (hard) and rubber were measured to contain 400 mg/kg, d and 250 mg/kg, d of lead (Pb) content respectively. In fines, lead content was measured as 320 mg/kg, d. The concentration of lead is reported in plastic products and fines as 500 ppm and 200 ppm respectively in another research [16]. Mercury content of 0.3 mg/kg, d was measured in fines. The concentration of cadmium measured in rubber material was higher than in other components of input waste stream i.e.11 mg/kg, d. In another study [16]rubber is reported to contain about same concentration of cadmium.
In the elemental analysis of input waste stream’s components, rubber was found to be the most problematic material in terms containing very high concentration of pollutant and potentially toxic elements. After rubber other problematic components identified were plastic (hard) and textile. The elemental analysis of various components of input waste stream (i.e. C&IW) to produce SRF is given in Table 1.