Main Title |
Zinc precipitation and recovery from viscose rayon waste water. / |
Author |
Roc, David M. ;
Allma, Grady
|
Other Authors |
|
CORP Author |
American Enka Company. Central Engineering Department. |
Publisher |
[Environmental Protection Agency, Water Quality Office] : For sale by the Supt. of Docs., U.S. G.P.O., |
Year Published |
1971 |
Report Number |
EPA-WQO-12090-ESG; 02364,; 12090-ESG-01/71 |
Stock Number |
PB-205 205 |
OCLC Number |
54475397 |
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
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
EMBD MF |
PB-205 205 |
|
NRMRL/GWERD Library/Ada,OK |
06/18/2004 |
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 ; 28 cm |
Abstract |
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. |
Notes |
"12090ESG01/71." Includes bibliographical references. Microfiche. |