Main Title |
Ammonium-Carbonate leaching of metal values from water-treatment sludges / |
Author |
Hallowell, J. B. ;
Bartlett, E. S. ;
Cherry., R. H.
|
Other Authors |
|
CORP Author |
Battelle Columbus Labs., Ohio.;Industrial Environmental Research Lab., Cincinnati, Ohio. |
Publisher |
United States. Environmental Protection Agency. Office of Research and Development, Industrial Environmental Research Laboratory ; For sale by National Technical Information Service, |
Year Published |
1977 |
Report Number |
EPA 600-2-77-105; EPA-R-803787-01 |
Stock Number |
PB-271 014 |
OCLC Number |
04248273 |
Subjects |
Metals--Finishing ;
Sewage sludge
|
Additional Subjects |
Materials recovery ;
Industrial waste treatment ;
Water pollution control ;
Sludge disposal ;
Leaching ;
Ammonium compounds ;
Carbonates ;
Copper ;
Metal finishing ;
Nickel ;
Chromium ;
Electrowinning ;
Economic analysis ;
Process charting ;
Precipitation(Chemistry) ;
Solid waste disposal ;
Metal finishing industry ;
Ammonium carbonates ;
Heavy metals
|
Internet Access |
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
EJBD |
EPA 600-2-77-105 |
c.1 |
Headquarters Library/Washington,DC |
03/21/2014 |
ELBD ARCHIVE |
EPA 600-2-77-105 |
Received from HQ |
AWBERC Library/Cincinnati,OH |
10/04/2023 |
ELBD |
EPA 600-2-77-105 |
|
AWBERC Library/Cincinnati,OH |
04/12/2021 |
ESAD |
EPA 600-2-77-105 |
|
Region 10 Library/Seattle,WA |
03/23/2010 |
NTIS |
PB-271 014 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
xi, 55 pages : tables ; 28 cm. |
Abstract |
This project was undertaken to explore and develop processes based on ammoniacal leaching to recover metal values from metal-finishing wastewater treatment sludges. The objective was to eliminate or to reduce sufficiently the heavy metal content of the sludge so that it would no longer constitute a potential ecological hazard, thus greatly reducing the cost of sludge disposal. Preferred leaching conditions were defined. With two-stage leaching at 50C in concentrated ammonium carbonate, the copper-plus-nickel content can be reduced to a level of less than 1 percent from an original content on the order of 10 percent. By roasting the depleted sludge with soda ash, at least 80 percent of the chromium can be recovered in water-soluble form. Controlled-potential electrodeposition was shown to be capable of separately winning copper and nickel values from the pregnant ammoniacal leaching liquor. A process flow sheet is presented, and process economics are reviewed. The process studied would be an alternative only if costs for disposal of sludge rose to the highest part of the current range. |