| 摘要 |
PROBLEM TO BE SOLVED: To provide a contaminated soil remediation agent and a lasting stabilization agent which recover soil functions by mixing them with such soils as a soft soil with a high water content or a slimy sludge to improve and maintain the pH of the soils to be neutral and to reduce hexavalent chromium remaining in the soils to trivalent chromium stable in the nature and to create an environment in which the chromium does not return to hexavalent chromium by re-oxidation. SOLUTION: The treatment agent for hexavalent chromium soil comprises mixing 90 pts.wt. of portland cement, 200 pts.wt. of calcium sulfate (anhydrous gypsum), 3.6 pts.wt. of aluminum sulfate, 1.0-2.0 pts.wt. of a polymer coagulant, 15-150 pts.wt. of sodium bisulfite and 1-15 pts.wt. of protein with 700 pts.wt. of at least one kind selected from the group consisting of paper sludge, flyash, zeolite, bagasse and fired laterite. COPYRIGHT: (C)2005,JPO&NCIPI |
