| 摘要 |
PROBLEM TO BE SOLVED: To obtain sufficient insolubilizing effect of arsenic, and to prevent elution of other heavy metals. SOLUTION: The treatment material of arsenic-contaminated soil includes an iron salt having an acidic pH, a pH buffer material which exhibits a buffer action between the iron salt, and a strength-improving material having a neutral pH. Specifically, the iron salt is ferrous sulfate; the pH buffer material is limestone; and the strength-improving material is a gypsum-based solidifying material. A method of treating arsenic-contaminated soil includes adding and mixing a treatment material including an iron salt having an acidic pH, a pH buffer material in an amount equivalent to neutralization, and a gypsum-based solidifying material having a neutral pH with the arsenic-contaminated soil. COPYRIGHT: (C)2011,JPO&INPIT |
