Natural analog system for reducing permeability of ground

摘要

A method of chemically and physically treating unconsolidated soils, over burden, fill and certain waste materials (the “ground”), or partly consolidated materials that can be excavated and broken up by normal earth moving and soil mixing equipment. This treatment results in the reduction of permeability in the ground, and as a result permits the prevention or control of contaminant migration from a site containing ground wastes of various types, thereby isolating these wastes.

主权项

1. A method of enhancing a use of a Natural Analog System (NAS), the steps comprising:
a) analyzing waste in a waste zone to identify chemical constituents for which immosbilization is particularly desirable; b) impregnating said waste zone with a known increment of a suitable solution equal to or greater than the calculated amount required to react with said chemical constituents, wherein the suitable solution comprises iron in solution and a solution selected from the group consisting of CaCl2 (solution)+Na2C03 (solution), CaCl2 (solution)+Na2S04 (solution), CaCl2 (solution)+Na2HP04 (solution), CaCl2 (solution)+NaOH (solution), and combinations thereof; and c) selectively immobilizing the chemical constituents of the waste as insoluble sols formed from said chemical constituents and the suitable solutions; and d) repeating steps a-c until refusal occurs.