Peroxide oxidation of iron in coal mine drainage

Journal Article · Fri Jul 01 04:00:00 EDT 1977 · J. Water Pollut. Control Fed.; (United States)

OSTI ID:7282370

Cole, C A; Molinski, A E; Rieg, N; Backus, F

Ferrous iron in a coal mine drainage water at Wildwood, Pennsylvania, was found to be oxidizing and precipitating in a small receiving stream. A cascade aeration system and a 3800-m/sup 3/ cement settling basin were installed in an effort to remove the iron from the nearly all 400 m/sup 3//d flow but were only partially successful. Of the 30 to 40 mg/1 or iron entering the system, as much as 25 mg/1 was escaping into the stream and about half of this was unoxidized. Hydrogen peroxide was investigated at the site as an oxidant to increase the iron oxidation and enhance precipitation. The stoichiometric requirement of hydrogen peroxide to iron is 1:3.3 in acid or neutral solutions. The oxidized iron then reacts with the alkalinity in water to precipitate as ferric hydroxide. A permanent installation is now producing an effluent of less than 1 mg/1 of total iron with 7 mg/1 of peroxide.

• OSTI ID: 7282370
• Journal Information: J. Water Pollut. Control Fed.; (United States), Journal Name: J. Water Pollut. Control Fed.; (United States) Vol. 49:7; ISSN JWPFA
• Country of Publication: United States
• Language: English

Related Subjects

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54 ENVIRONMENTAL SCIENCES
ACID MINE DRAINAGE
CHEMICAL REACTIONS
COAL MINES
ELEMENTS
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
IRON
METALS
MINES
NORTH AMERICA
OXIDATION
OXYGEN COMPOUNDS
PENNSYLVANIA
PEROXIDES
PH VALUE
POLLUTION
PRECIPITATION
SEPARATION PROCESSES
STOICHIOMETRY
TRANSITION ELEMENTS
USA
WATER POLLUTION