15.1 and Table 15.2. Table 15.3 lists the trace heavy metals found in soil and their sources. Of next significance is Ni. Essentially all of the plastics we have been discussing in class are thermoplastics. They can be ground, melted, and reformulated.
Examples are phenols, polyesters, epoxides, and silicons.
These are relatively difficult to reuse. Reuse may require pyrolysis and hydrolysis methods. Easy to recycle, though usually not recycled within the paper manufacturing facility. Minimum use of paper products should be practiced, and recycled material should be used whenever possible rather than virgin paper. Now it is a growing concern with respect to genetic engineering and biomaterials.