Method for purification of substances contaminated with organic chemicals
AssigneesOsaka University, Esri Co. Ltd.
InventorsHiroyasu Nagase, Kazuhisa Miyamoto, Kazumasa Hirata, Hiroshi Saito
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Abstract
The present invention provides a method for purifying organic chemical-containing contaminated substances by which various organic chemicals (contaminants) can be readily and sufficiently decomposed in a short time, the method comprising the steps of adding a metal salt and a transition metal ionic compound to water or soil that contains organic chemicals, decomposing the organic chemicals by irradiating with light, and separating/collecting the detoxified organic chemicals.
Claims14
A method for purifying an aromatic compound-containing contaminated substance comprising:
- a first step of irradiating the aromatic compound-containing contaminated substance with light in the presence of (i) at least one water-soluble alkali metal compound and/or at least one water-soluble alkaline-earth metal compound selected from the group consisting of calcium compounds, magnesium compounds, potassium compound, and sodium compounds, and (ii) at least one transition metal ionic compound selected from the group consisting of cobalt compounds, manganese compounds, nickel compounds, copper compounds and zinc compounds, whereby the aromatic compound is polymerized,
- wherein the transition metal ionic compound is a metal compound in which a transition metal becomes ions in an aqueous solution;
- and
- a second step of collecting the polymerized aromatic compound that is generated in the first step.
A method for purifying an aromatic compound-containing contaminated substance wherein the method comprises the steps of:
- (I) irradiating the aromatic compound-containing contaminated substance with light in the presence of (i) at least one water-soluble alkali metal compound and/or at least one water-soluble alkaline-earth metal compound selected from the group consisting of calcium compounds, magnesium compounds, potassium compound, and sodium compounds;
- and then
- (II) adding (ii) at least one transition metal ionic compound selected from the group consisting of cobalt compounds, manganese compounds, nickel compounds, copper compounds and zinc compounds, whereby the aromatic compound is polymerized,
- wherein the transition metal ionic compound is a metal compound in which a transition metal becomes ions in an aqueous solution;
- and
- (III) collecting the polymerized aromatic compound that is generated in step (II).
Dependencies are inferred from the claim text.