System and method for generation of point of use reactive oxygen species

A method for oxidizing a contaminant, comprising:

• contacting a reactive oxygen precursor formulation with an aqueous stream containing the contaminant, wherein the reactive oxygen precursor formulation comprises:
• a peracid concentrate capable of generating singlet oxygen, the peracid concentrate comprising a mixture of an alkaline concentrate, hydrogen peroxide and an acyl donor, wherein the molar ratio of hydrogen peroxide to acyl donor reactive groups is in the range of about 1:1.25 to about 1:4, and wherein the reactive oxygen species precursor formulation has a pH value ranging from about pH 9.5 to about pH 12.5 and a peracid anion to peracid molar ratio greater than about 1:1, and wherein the peracid concentrate has a minimal hydrogen peroxide residual to minimize quenching of singlet oxygen;
• wherein the contacting of the reactive oxygen precursor formulation with the aqueous stream generates a reactive oxygen species and oxidizes the contaminant.

A method for oxidizing a contaminant, comprising:

• contacting a reactive oxygen precursor formulation with one of a hydraulic fracturing water, a produced water from a subsurface formation or an oil and/or gas production well water containing the contaminant, wherein the reactive oxygen precursor formulation comprises:
• a peracetate concentrate capable of generating singlet oxygen, the peracetate concentrate comprising a mixture of an alkaline concentrate, hydrogen peroxide and an acyl donor, wherein the molar ratio of hydrogen peroxide to acyl donor reactive groups is in the range of about 1:1.25 to about 1:4, and wherein the reactive oxygen species precursor formulation has a pH value ranging from about pH 9.5 to about pH 12.5 and a peracetate anion to peracetic molar ratio greater than about 1:1, and wherein the peracetate concentrate has a minimal hydrogen peroxide residual to minimize quenching of singlet oxygen;
• wherein the contacting of the reactive oxygen precursor formulation with the one of the hydraulic fracturing water, the produced water from a subsurface formation or the oil and/or gas production well water generates an oxygen species and oxidizes the contaminant.