Foam separation of acid mine drainage.
Contributors: United States. Environmental Protection Agency.
Series: Water pollution control research series
Publisher: U.S. Environmental Protection Agency; for sale by the Supt. of Docs., U.S. Govt. Print. Off.]
Published: 1971
Place of publication: [Washington
Language: eng
Number of pages: 59
Subjects: Acid mine drainage.; Water -- Purification -- Foam fractionation.
Description: Laboratory studies of continuous flow foam separation were conducted to determine the optimum conditions for maximum extraction of dissolved metal cations (Fe, Ca, Mg, Mn, and Al) from acid mine drainage. Foaming experiments were conducted in a 6 in.-diameter glass column capable of liquid flow rates of 3-12 gal. per hour. The approach to foam separation taken was the production of the persistent foams which allowed protracted foam drainage to reduce liquid carry-over in the foam. The effects of pH, chelate addition, surfactant type and concentration, air sparging rate, metal concentration and foam drainage were investigated in relation to metal extraction. Results show that sewage foamability is too low for foam separation alone to be a feasible sewage treatment method.
Notes: Includes bibliographical references.
"14010 FUI 10/71."
Prepared for the Environmental Protection Agency under contract no. 14-12-876.