Accession Number : AD0783245

Title :   Investigation into the Reasons for and Solution to the Reduced Capacity of the Electroplating Rinse Water Demineralization System at Tinker AFB, Oklahoma.

Descriptive Note : Final rept. Jun 73-Jun 74,


Personal Author(s) : Kroop,Ronald H. ; Mazewski,Eugene E. ; Pineda,Arthur A.

Report Date : JUL 1974

Pagination or Media Count : 54

Abstract : Laboratory scale investigations were conducted to determine why the operating capacity of the ion exchange demineralization system utilized to recycle electroplating rinse waters at Oklahoma City Air Material Area, Tinker Air Force Base, Oklahoma had decreased by over 50% in approximately 18 months of operation. Total capacity and continuous flow experiments revealed irreversible absorption of trivalent metals on the cation resin; irreversible exchange, by normal regeneration techniques, of para nitrobenzene, sulfonic acid on the anion resin; and oxidation of the strong base functional groups. Physical plugging of the ion exchange resins from sediment in the process water and calcium sulfate precipitation were identified as contributing to the reduced capacity. Based on laboratory results recommendations are made to change the cation regenerant from sulfuric acid to hydrochloric acid and to periodically regenerate the anion resin with caustized brine. Other recommendations are made concerning system operation. (Author)

Descriptors :   *Demineralizers, *Ion exchange resins, Regeneration(Engineering), Electroplating, Wastes(Industrial), Performance(Engineering), Test methods, Fouling, Air Force facilities, Oklahoma

Subject Categories : Industrial Chemistry and Chemical Processing
      Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE