Abstract
The building of a sustainable material circulating system is imminent for the threatened waste disposal landfills in Japan. Now, man-aided recycling is active for the purpose of lessening waste. Al-though recycling originally aimed at saving resources and alleviating environmental problems simultaneously, it is nevertheless a current issue that problem of cost and environmental damages have occurred. Also, other problems include the generation of toxic substances due to the mixing of dissimilar materials in the recycling process in each industrial production field, and its progression in the future is feared. This indicates that there is a need to build a purging or purification system in recycling similar to the one originally equipped in the ecosystem. In this report, the category of the poison and the recycling process in the circulating material will be defined and the influence on the material will be examined.
