For selenium contaminated soil cleaning agents and stabilizers and selenium contaminated soil remediation method using these

摘要

PROBLEM TO BE SOLVED: To provide a cleaning agent and a stabilizer for selenium- contaiminated soil, which is capable of efficiently cleaning selenium from the selenium-contaminated soil and a method of cleaning and repairing selenium- contaminated soil using the same and capable of remarkably reducing the environment loading to decrease the risk. SOLUTION: The soil cleaning agent comprises a phosphoric acid aqueous solution or a sulfuric acid aqueous solution. The stabilizer for stabilizing selenium in the soil is composed of a lanthanum salt, cerium (III) salt or iron (II). The method of cleaning and repairing the selenium-contaminated soil uses the same.