| Main Title |
PBI reverse osmosis membrane for chromuim plating rinse water / |
| Author |
Davis, Howard J., ;
Model, Frank S. ;
Leal., Joseph R.
|
| Other Authors |
|
| CORP Author |
American Electroplaters' Society, Inc., Winter Park, Fla. ;Celanese Research Co., Summit, N.J.;Industrial Environmental Research Lab.-Cincinnati, Ohio. |
| Publisher |
United States Environmental Protection Agency, Industrial Environmental Research Laboratory, Office of Research and Development ; for sale by the National Technical Information Service, |
| Year Published |
1978 |
| Report Number |
EPA 600/2-78-040; EPA-R-803620 |
| Stock Number |
22161 |
| OCLC Number |
04044542 |
| ISBN |
pbk. |
| Subjects |
Chromium-plating ;
Polymerization ;
Polymers ;
Osmosis
|
| Additional Subjects |
Electroplating ;
Water pollution control ;
Chromium ;
Metal finishing ;
Design criteria ;
Performance evaluation ;
Benzimidazoles ;
Physical properties ;
Tests ;
Reverse osmosis membranes ;
Polybenzimidazoles ;
Closed cycle systems
|
| Internet Access |
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| EJBD |
EPA 600-2-78-040 |
c.1 |
Headquarters Library/Washington,DC |
04/22/2014 |
| ELBD ARCHIVE |
EPA 600-2-78-040 |
Received from HQ |
AWBERC Library/Cincinnati,OH |
10/04/2023 |
| ELBD |
EPA 600-2-78-040 |
|
AWBERC Library/Cincinnati,OH |
11/08/2022 |
| ESAD |
EPA 600-2-78-040 |
|
Region 10 Library/Seattle,WA |
03/23/2010 |
| NTIS |
PB-280 944 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
vii, 28 pages : illustrations, figures, tables ; 28 cm. |
| Abstract |
A laboratory research study was carried out to select and optimize polybenzimidazole (PBI) reverse osmosis (RO) membranes for the treatment of chromium plating rinse water. The effects of important film casting and annealing variables on RO properties were investigated. Membranes were tested in high pressure flow cells with dilute sodium chloride and chromic acid feed solutions. PBI RO membranes were found to be resistant to attack by chromic acid. After pretesting with sodium chloride, the membranes showed a short-term effective level of rejection with chromic acid. Upon retesting with sodium chloride, the same membranes again exhibited high salt rejections, thereby demonstrating they had not been chemically attacked by chromic acid. A significant improvement in long-term rejection of chromic acid was obtained when the membranes were pretreated with sodium tungstate solution. The addition of sodium tungstate to the feed solution further improved chromic acid rejection. Highest levels of chromic acid rejection were obtained by adjusting the pH of the feed. However, neither pH adjustment nor addition of tungstate to the feed are acceptable in practice because of possible contamination of the plating bath by the extraneous ions. The project failed to develop an acceptable PBI RO membrane for treating chromium plating rinse water. |
| Notes |
EPA Grant No. Contract Number: R-803620. "March 1978." "Prepared for The American Electroplaters' Society, Winter Park, Florida." Includes bibliographical references (page 27). |
