Peroxide water treatment process
First Claim
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1. A process for removing pentachlorophenol from contaminated water comprising:
- oxidizing the pentachlorophenol in the contaminated water with hydrogen peroxide in the presence of ferrous ions in a concentration of 5 to 7%, by weight, based on the weight of hydrogen peroxide at a weight ratio of hydrogen peroxide to COD, of contaminants, of at least 1.25;
1 and an acid pH of about 3 to about 4, to produce an oxidized waste water.
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Abstract
Aromatic organic contaminants in waste water efficiently removed by oxidizing the contaminants with hydrogen peroxide in the presence of a catalytic amount of ferrous ions, at an acid pH, to produce an oxidized water which may be passed through activated carbon to adsorb residual organic contaminants; the process is especially useful for treatment of contaminated water derived from a wood preservation treatment and containing polyaromatic hydrocarbons and phenols and/or chlorinated phenols.
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Citations
11 Claims
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1. A process for removing pentachlorophenol from contaminated water comprising:
oxidizing the pentachlorophenol in the contaminated water with hydrogen peroxide in the presence of ferrous ions in a concentration of 5 to 7%, by weight, based on the weight of hydrogen peroxide at a weight ratio of hydrogen peroxide to COD, of contaminants, of at least 1.25;
1 and an acid pH of about 3 to about 4, to produce an oxidized waste water.- View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A process for removing organic contaminants comprising pentachlorophenol from a contaminated water derived from a wood preservation treatment comprising:
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i) oxidizing the organic contaminants comprising pentachlorophenol in the water with hydrogen peroxide in the presence of catalytic ferrous ions in a concentration of 5 to 7%, by weight, based on the weight of hydrogen peroxide, at an acid pH of 3 to 4 and a weight ratio of hydrogen peroxide to COD of said contaminants of at least 1.25;
1, said contaminants consisting essentially of said pentachlorophenol, polynuclear aromatic hydrocarbons and wood preservative phenols, andii) flowing the oxidized water from i) through activated carbon to adsorb residual organic contaminants. - View Dependent Claims (9, 10, 11)
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Specification