Method for environmental treatment of heavy metals

Details Method for environmental treatment of heavy metals Method for environmental treatment of heavy metals

1996-11-19

1998-08-25

Ludlow, Jan

Cleaning and liquid contact with solids

Processes

Using solid work treating agents

134 2, 134 6, 134 38, 451 38, 451 39, 588236, 588249, 588256, B08B 700, B08B 1500

Patent

active

057979928

ABSTRACT:
An improved method for decontamination of lead contaminated surface coatings utilizing calcium phosphate minerals. The method for decontamination of lead contaminated surface coatings uses solid calcium phosphate material added to the abrasive blasting media prior to the structure being abrasive blasted. After removal of the lead contaminated surface coating by abrasive blasting with the calcium phosphate--abrasive blasting media mixture, the blown down surface coating and calcium phosphate--abrasive blasting media mixture are left in-situ to allow a chemical reaction to occur which renders the lead immobile and biologically nonhazardous. The calcium phosphate can be in one of several forms which are readily available and inexpensive.

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