| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a material for preventing the elution of heavy metals, which can sufficiently prevents even an object to be processed such as soil heavily contaminated by the heavy metals from causing the elution of the heavy metals at a small additive amount. <P>SOLUTION: The material for preventing the elution of the heavy metals contains a light-burned magnesia-part hydrate (A) configured by partially hydrating a light-burned magnesia, and a clay (B) in which a total extraction rate of silica (SiO<SB POS="POST">2</SB>) and alumina (Al<SB POS="POST">2</SB>O<SB POS="POST">3</SB>) from the clay, measured by an allophane quantitative test, is 20 mass% or more, wherein the mass ratio of (A) to (B) falls within the range of 0.2-20. <P>COPYRIGHT: (C)2012,JPO&INPIT |
