Waste-treating material
AssigneesKanegafuchi Kagaku Kogyo Kabushiki Kaisha, En-Tech Research Institute Inc.
InventorsTaiichiro Sasae, Tomio Nishida, Masakazu Uekita, Takashi Funahashi
Life of this patent
Estimating the term…
Abstract
A waste-treating material which comprises cement and at least one reducing metal, effective for stabilizing industrial wastes containing harmful metals like a heavy metal and the like and cyanides. A preferred example of the reducing metal is iron. Additionally the waste-treating material may also contain at least one member selected from a group consisting of a reducing agent, aluminum sulfate, allophane, and bentonite as the auxiliary. The use of this waste-treating material makes it possible to stabilize the hazardous heavy material and the cyanides contained in the industrial wastes, thereby remarkably contributing to a stabilizing treatment of the industrial wastes.
Claims9
A material for treatment of waste containing at least one hazardous material selected from the group consisting of mercury, arsenic, copper, lead, nickel, cadmium, chromium, and cyanide, which comprises cement and at least one reducing metal in a form of powder or grain and capable of reducing metals of said hazardous material, the reducing metal being from 5 to 75 wt. % of the material for treatment of waste.
A method for treatment of waste containing at least one hazardous material selected from the group consisting of mercury, arsenic, copper, lead, nickel, cadmium, chromium, and cyanide, which comprises mixing the waste with a waste treating material including cement and at least one reducing metal in a form of powder or grain capable of reducing metals of the hazardous material, and solidifying the mixture by curing.
Dependencies are inferred from the claim text.