Record Display for the EPA National Library Catalog


Main Title Ammonium-Carbonate leaching of metal values from water-treatment sludges /
Author Hallowell, J. B. ; Bartlett, E. S. ; Cherry., R. H.
Other Authors
Author Title of a Work
Bartlett, E. S.,
Cherry, R. H., Jr,
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
Description Access URL
Library Call Number Additional Info Location Last
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.
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.