Method of treatment of dredged material for beneficial use
AssigneeThe Trustees of Columbia University in the City of New York
InventorsSofiya Kozlova, Semyon A. Shimanovich, Christian Meyer
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Abstract
A method for the decontamination and solidification of dredged material is described. The method includes, in the following order, (a) adding a lime-based binder to dredged material to form a mixture; (b) letting the mixture cool to about ambient temperature; and (c) adding to the mixture a chelating agent. The order of the steps may not be reversed without affecting the effectiveness of the treatment of the dredged material. A method for producing filler containing decontaminated and solidified dredged material is also described. The method includes treating dredged material with a lime-based binder and a chelating agent and adding the resulting mixture to concrete.
Claims19
A method for the decontamination and solidification of a dredged material, wherein the dredged material comprises clay-sand agglomerates having a closed structure and an initial average particle size, comprising:
- (a) adding a pulverized quick-lime to the dredged material to form a mixture, the mixture comprising deconglomerated dredged material having a porous structure and an average particle size smaller than the initial average particle size;
- and
- (b) adding a chelating agent to the mixture,
- wherein the chelating agent is a chemical composition providing chelation of and formation of coordination compounds with chemical contaminants in the dredged material, and
- wherein the chelating agent comprises in solution sodium chloride, potassium chloride, potassium bromide, calcium sulfate, lithium chloride, barium chloride, magnesium chloride, strontium chloride, cobalt chloride, zinc chloride, copper chloride, tannin and pyrolignous acid.
A method for the decontamination and solidification of a dredged material, comprising, in the following order:
- (a) adding a lime-based binder to the dredged material to form a mixture;
- (b) letting the mixture cool to about room temperature;
- and
- (c) adding a chelating agent to the mixture,
- wherein the chelating agent comprises in solution sodium chloride, potassium chloride, potassium bromide, calcium sulfate, lithium chloride, barium chloride, magnesium chloride, strontium chloride, cobalt chloride, zinc chloride, copper chloride, tannin and pyrolignous acid.
A method for producing a filler for a composite material, comprising:
- (a) adding a pulverized quick-lime to a dredged material comprising clay-sand agglomerates having a closed structure and an initial average particle size to form a first mixture, the first mixture comprising deconglomerated dredged material having a porous structure and an average particle size smaller than the initial average particle size;
- (b) adding a chelating agent to the first mixture to form a second mixture;
- (c) forming from the second mixture at least one of chips, granules, and a combination thereof;
- (d) drying the at least one of chips, granules, and a combination thereof formed in (c);
- and
- (e) grinding the at least one of chips, granules, and a combination thereof dried in (d) to form the filler, the drying and the grinding being carried out at about ambient temperature,
- wherein the chelating agent comprises a chemical composition for chelation of and formation of coordination compounds with chemical contaminants in the dredged material, and
- wherein the chelating agent comprises in solution sodium chloride, potassium chloride, potassium bromide, calcium sulfate, lithium chloride, barium chloride, magnesium chloride, strontium chloride, cobalt chloride, zinc chloride, copper chloride, tannin and pyrolignous acid.
The method for producing a filler for a composite material, comprising, in the following order:
- (a) adding a lime-based binder to a dredged material to form a mixture;
- (b) letting the mixture cool to about ambient temperature;
- (c) adding a chelating agent to the mixture form a new mixture;
- (d) forming from the new mixture at least one of chips, granules, and a combination thereof;
- (e) drying the at least one of chips, granules, and a combination thereof formed in step (d);
- and
- (f) grinding the at least one of chips, granules, and a combination thereof dried in step (e) to form the filler, the drying and the grinding being carried out at about ambient temperature,
- wherein the chelating agent comprises in solution sodium chloride, potassium chloride, potassium bromide, calcium sulfate, lithium chloride, barium chloride, magnesium chloride, strontium chloride, cobalt chloride, zinc chloride, copper chloride, tannin and pyrolignous acid.
Dependencies are inferred from the claim text.