| 摘要 |
PROBLEM TO BE SOLVED: To clean the contaminated soil and improve the quality of water by sealing contaminated soil and further, promoting decomposition of sludge. SOLUTION: The surface of the ground 1 of the accumulated contaminated soil is covered with a sheet for preventing diffusion of pollution made from a biodegradable starch resin which has permeability to gas and water and is formed mainly of corn starch 55-65 wt% containing rice starch 7-11 wt%, oil 4-14 wt% composed mainly of glycerin, low-density polyethylene 7-17 wt%, and ethylene acrylate 7-14 wt%. Earth and sand 6 are spread over the sheet 3 for preventing the diffusion of pollution, thus the contaminated soil is pressed and hardened. COPYRIGHT: (C)2004,JPO
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