Combined chemical oxidation/assisted bioremediation of contaminants
AssigneeSolvay (Societe Anonyme)
InventorsNoel BOULOS, Alastair McNeillie, Jason Muessig
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Abstract
A method for the combined chemical oxidation/assisted bioremediation of contaminated materials, comprising contacting a contaminated material with at least one metal chelate and at least one peroxide compound.
Claims13
1- A method for the combined chemical oxidation/assisted bioremediation of a contaminated material, comprising contacting a contaminated material with at least one metal chelate and at least one peroxide compound.
2- The method according to claim 1, wherein said material is soil or water.
3- The method according to claim 1, wherein said at least one metal chelate comprises a Fe chelate.
4- The method according to claim 1, wherein said at least one peroxide compound comprises at least one of Ca, Mg and Zn peroxide, sodium percarbonate and hydrogen peroxide.
5- The method of claim 1, wherein a metal chelate is directly added to the contaminated material.
6- The method according to claim 1, further comprising adding a buffer to the material to adjust the pH to a value of from 7 to 9.
7- The method according to claim 1 wherein at least two peroxide compounds are used.
8- The method according to claim 4 wherein one of hydrogen peroxide and sodium percarbonate are used and one of Ca, Mg and Zn peroxide are used.
9- The method according to claim 8, wherein the one of Ca, Mg and Zn peroxide is added in a first stage, the metal chelate is added in a second stage, and the one of sodium percarbonate and hydrogen peroxide is added in a third stage.
10- The method according to claim 8, wherein the metal chelate is added in a first stage, the one of hydrogen peroxide and sodium percarbonate is added in a second stage, and the one of Ca, Mg and Zn peroxide is added in a third stage.
11- The method according to claim 8, wherein the metal chelate is added in a first stage, the one of Ca, Mg and Zn peroxide is added in a second stage and the one of hydrogen peroxide and sodium percarbonate is added in a third stage.
12- The method of claim 1, wherein the contaminated material comprises a transition metal and wherein a chelating agent is directly added to the contaminated material, a metal chelate forming in said material in situ.
13- The method of claim 12, wherein the metal is Fe.