Plastics as a source of new pollutant

GEOC 36

Katsuhiko Saido, Saidophd@pha.nihon-u.ac.jp1, Keiji Amamiya2, Kazuo Tomono2, Kyung-Oh Kwak2, Yoichi Kodera, y-kodera@aist.go.jp3, Seon-Yong Chung4, Seiya Tsushima5, and Naoto Ogawa, naotow@niaes.affrc.go.jp5. (1) College of Pharamacy, Nihon University, 771 Narashinodai, Funabashisi, 2748555, Japan, (2) College of Pharmacy, Nihon University, 771 Narashinodai, Funabashisi, 2748555, (3) Hydrocarbon Utilization Research Group, AIST, 16-1 Onogawa, Tukubashi, 3050034, Japan, (4) Dept. of Environmental Eng, Chonnam National University, Gwangu, South Korea, (5) NIAES, 3-1-3 Kannonndai, Tukubasi, 3058304
The polyurethane (PUT) is one of the important plastic, which is widely used as a heat insulating material of the refrigerator or automobile. This study clarifies the unknown mechanism of the low-temperature disruption of the plastics under the living life or in the nature. Low temperature disruption of PUT using a new heating medium was carried out at 50-200 °C. PUT obtained from commercial and reaction material is used after the low molecular weight compounds were removed completely. The disruption began at 50 °C and major product was tolylene 2,4-diisocyanate(TIC). The rate constant of TIC generation at each reaction temperature was calculated, and the kinetic parameter of PUT disruption was determined. The activation energy was remarkably lower than that of phthalic ester. The quantitative analyses of PUT suggest that the TIC contamination from marine debris PUT was suspected strongly. The TIC degrading microbe was isolated from activated sludge.
 

General Poster Session
7:00 PM-9:00 PM, Sunday, 10 September 2006 Moscone Center -- Hall D, Poster

Division of Geochemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006