Method for treatment and disposal of lead based paint
AssigneeEntact, Inc.
InventorsMichael Kell Studer, Philip J. Pisani
Life of this patent
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Abstract
This invention relates to the treatment of lead based paint mixtures by treating the lead based paint mixture with an additive from the group consisting of phosphoric acid, monocalcium phosphate, monoammonium phosphate and diammonium phosphate, either alone or in combination with Portland Cement.
Claims8
A method of treating lead based paint waste, the method consisting essentially of the steps of mixing the lead based paint waste with at least one agent selected from the group consisting of phosphoric acid, monocalcium phosphate, monoammonium phosphate, and diammonium phosphate, in sufficient quantities such that the mixture will have an optimum pH range between 5.5 and 11.5 so that under both acidic and non-acidic leaching conditions the lead in the mixture will be converted to substantially non-leachable form.
A non-hazardous lead based paint waste mixture which may be safely disposed in a landfill consisting essentially of a lead based paint waste containing unacceptable levels of leachable lead mixed with at least one agent selected from the group consisting of phosphoric acid, monocalcium phosphate, monoammonium phosphate, and diammonium phosphate in quantities sufficient such that the mixture will have an optimum pH range between 5.5 and 11.5 so that under both acidic and non-acidic leaching conditions the lead will be converted to a substantially non-leachable form.
A method of treating lead based paint waste containing unacceptable levels of leachable lead, the method comprising the step of mixing the lead based paint waste with at least one agent selected from the group consisting of phosphoric acid, monocalcium phosphate, monoammonium phosphate, and diammonium phosphate and mixed with the additional agent Portland Cement in sufficient quantities such that the mixture will have an optimum pH range between 5.5 and 11.5 so that under both acidic and non-acidic leaching conditions, the lead in the mixture will be converted to a substantially non-leachable form.
A non-hazardous lead based paint waste mixture which may be safely disposed of in a landfill comprising a lead based paint waste containing unacceptable levels of leachable lead mixed with at least one first agent selected from the group of phosphoric acid, monocalcium phosphate, monoammonium phosphate, and diammonium phosphate and mixed with the additional agent Portland Cement in quantities sufficient such that the mixture will have an optimum pH range between 5.5 and 11.5 so that under both acidic and non-acidic leaching conditions the lead will be converted to a substantially non-leachable form.
Dependencies are inferred from the claim text.