| 摘要 |
PROBLEM TO BE SOLVED: To provide a method which reduces a lead content and lead elution amount in lead-containing combustion ash and the like at the same time, respectively specified in the test methods in Notification No.19 and 18 of the Ministry of the Environment based on the Soil Contamination Countermeasures Law. SOLUTION: In the treatment method of combustion ash, combustion ash or soil is kneaded with a dithiocarbamic acid-based chelating agent, starch, and an amorphous silica compound, and cured to reduce the lead content to 150 mg/kg BD or less measured by the test method specified in Notification No.19 of the Ministry of the Environment, 2003, and the lead elution amount to 0.01 mg/L or less measured by the test method specified in Notification No.18 of the Ministry of the Environment, 2003. COPYRIGHT: (C)2009,JPO&INPIT |
