| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a treating method capable of obtaining combustion ash usable for soil such as a soil improving material, a grassland improving material, a backfill, bank or gravel, by separating lead components from combustion ash containing lead components and having no environmental adverse affect. <P>SOLUTION: In this separation method of lead components from combustion ash, starches containing corn starch, potato starch, sweet potato starch, tapioca starch, wheat starch and rice starch; physically and/or chemically processes starches; and one or more kinds of starches selected from material containing starches, are added to the combustion ash containing lead component in advance, then the lead components are separated from combustion ash by heating. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
