| Main Title |
Zinc precipitation and recovery from viscose rayon waste water / |
| Author |
Rock, David M., ;
Roc, David M. ;
Allma, Grady
|
| Other Authors |
|
| 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 |
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| 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. |
| 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 |
"January 1971." Includes bibliographical references (pages 61-63). |
