Record Display for the EPA National Library Catalog


Main Title Zinc precipitation and recovery from viscose rayon waste water /
Author Rock, David M., ; Roc, David M. ; Allma, Grady
Other Authors
Author Title of a Work
Allman, Grady.
Rock, David M.
CORP Author American Enka Company. Central Engineering Department.
Publisher United States Environmental Protection Agency, Water Quality Office,
Year Published 1971
Report Number EPA 950-R-71-043; 12090 ESG 01/71; EPA-WQO-12090-ESG; 02364,
Stock Number PB-205 205
OCLC Number 00257782
Subjects Textile waste ; Rayon industry and trade ; Zinc
Additional Subjects ( Zinc sulfates ; Chemical removal(Water treatment)) ; ( Textile industry ; Industrial waste treatment) ; ( Industrial waste treatment ; Zinc sulfates) ; ( Materials recovery ; Zinc sulfates) ; Materials recovery ; Spinning(Staple fibers) ; Textile processes ; Precipitation(Chemistry) ; Pilot plants ; Neutralizing ; Sludge ; Cost estimates ; Operating costs ; Utilization ; Rayon ; Water pollution control ; Zinc hydroxides
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 950-R-71-043 Headquarters Library/Washington,DC 06/11/2013
EJBD  EPA 950-R-71-043 Headquarters Library/Washington,DC 05/30/2014
ELBD RPS EPA 12090-ESG-01-71 repository copy AWBERC Library/Cincinnati,OH 08/26/2019
ELBD  EPA 12090-ESG-01-71 AWBERC Library/Cincinnati,OH 09/14/2011
NTIS  PB-205 205 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation viii, 86 pages : illustrations, figures, tables ; 28 cm.
A zinc recovery system was developed to recover zinc from dilute zinc sulfate lost both when acid spun yarns are washed and at various stages in the spinning process. The process included neutralization of the waste stream to pH 6.0, sedimentation of insolubles, crystallization of zinc hydroxide in a high pH environment, sedimentation of zinc hydroxide and solubilization of the zinc with sulfuric acid. A pilot plant was constructed and operated. It obtained 98-99% removal efficiency. The zinc hydroxide sludge was easily concentrated. Operating and maintenance costs were estimated. Recovery and sale of 2000 lbs of zinc daily assures recovery of these costs.
"January 1971." Includes bibliographical references (pages 61-63).