Oxidation of organic compounds
View Patent ↗An improved method for treating organic compounds present in soil, groundwater and other environments is disclosed. The method involves the use of a peroxygen compound and a chelated transition metal.
1. A method of oxidizing an organic compound present in soil, groundwater, process water or wastewater said method comprising contacting the organic compound with a composition comprising a persulfate, and a chelated metal catalyst composed of divalent or trivalent cationic species of iron.
2. A method as in claim 1 , wherein the organic compound is present in soil, groundwater, or wastewater.
3. A method as in claim 1 , wherein the organic compound is selected from the group consisting of volatile organic compounds, semi-volatile organic compounds, polyaromatic hydrocarbons, polychlorobiphenyls, pesticides and herbicides.
4. The method as in claim 1 , wherein the persulfate is a dipersulfate.
5. The method as in claim 4 , wherein the dipersulfate is selected from sodium, potassium or ammonium persulfate or a combination thereof.
6. The method as in claim 1 , wherein the persulfate is a monopersulfate.
7. The method as in claim 6 , wherein the monopersulfate is selected from sodium and potassium monopersulfate.
8. The method as in claim 1 , wherein the persulfate is a combination of a dipersulfate and monopersulfate.
9. The method as in claim 1 , wherein the iron is divalent.
10. The method as in claim 1 , wherein the iron is trivalent.
11. The method as in claim 1 , wherein the metal catalyst is chelated with ethylenediaminetetraacetic acid.
12. The method as in claim 1 , wherein the amount of chelated metal catalyst is sufficient to deliver an equivalent amount of transition metal in the range of 1-1000 ppm.
13. The method as in claim 1 , wherein the amount of persulfate is sufficient to satisfy the soil oxidant and to oxidize substantially all of the organic compound.
14. The method as in claim 1 , wherein the chelated metal catalyst and the persulfate are added in combination.
15. The method as in claim 1 , wherein the chelated metal catalyst and the persulfate are added sequentially.
16. The method as in claim 1 , wherein the metal catalyst is chelated with citrate.