CLEANING METHOD OF CYANIDE CONTAMINATED SOIL

摘要

PROBLEM TO BE SOLVED: To simply and surely insolubilize a cyanide contained in soil and also collectively clean the complex contamination of cyanide with benzene or the like. SOLUTION: Contaminated soil is charged in a soil hopper 2 of a soil cleaning system 1 and temporarily stored therein. The contaminated soil temporarily stored in the soil hopper 2 is quantitatively metered by a soil quantitative feeder 3 to be supplied to a mixer 5. A calcium oxide with the weight ratio of 10-20% to the contaminated soil is metered and supplied to the mixer 5 from a cleaning agent quantitative feeder 4. The supplied contaminated soil and the calcium oxide are mixed. After leaving the soil for a fixed time, it is recovered as mixed soil. COPYRIGHT: (C)2006,JPO&NCIPI