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Treatment of complex cyanide compounds for reuse or disposal

Author: Thomas N Hendrickson; Louis G Daignault; United States. Environmental Protection Agency. Office of Research and Monitoring.
Publisher: Washington, DC : [U.S. G.P.O.], 1973.
Series: Research reporting series., 2,, Environmental protection technology ;, 73-269.
Edition/Format:   Print book : National government publication : EnglishView all editions and formats
Summary:
Complex cyanides (forro- and forricyanide) in industrial waste water effluents impose a direct threat upon the environment. Methods to recover or destroy these compounds were evaluated in laboratory studies. The techniques tested include electrolysis, ozonation, chlorination and heavy metal ion precipitation. The study was conducted to determine the feasibility of using one or more of these methods to reduce the  Read more...
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Details

Material Type: Government publication, National government publication
Document Type: Book
All Authors / Contributors: Thomas N Hendrickson; Louis G Daignault; United States. Environmental Protection Agency. Office of Research and Monitoring.
OCLC Number: 1107456
Notes: "Project 12120 ERF."
Description: xi, 151 pages : illustrations ; 27 cm.
Contents: Conclusions --
Recommendations --
Introduction --
Materials & apparatus --
Procedures --
Discussion of results --
Full scale ozone bleach regeneration and waste destruction installation --
Berkey photo --
Acknowledgments --
References --
Glossary --
Appendices.
Series Title: Research reporting series., 2,, Environmental protection technology ;, 73-269.
Responsibility: by Thomas N. Hendrickson [and] Louis G. Daignault.

Abstract:

Complex cyanides (forro- and forricyanide) in industrial waste water effluents impose a direct threat upon the environment. Methods to recover or destroy these compounds were evaluated in laboratory studies. The techniques tested include electrolysis, ozonation, chlorination and heavy metal ion precipitation. The study was conducted to determine the feasibility of using one or more of these methods to reduce the concentration of ferricyanide in both concentrated (10,000 to 100,000 mg/1) and dilute (10 to 100 mg/1) waste effluents. Numerous analytical procedures were developed to enhance the accuracy of sample analysis over the concentration range studied. Ferrocyanide can be oxidized to ferricyanide in overflow photographic color process bleaches using either electrolysis or ozone and the waste bleach recirculated for reuse in the process. Dilute concentrations of ferricyanide can be destroyed using ozone or chlorine under proper conditions of temperature, pH, and catalyst addition. A cost analysis is included for all methods that were judged acceptable for commercial demonstration. Cost data for each procedure is based upon an "average combined" photographic processor as defined in the report. This report was submitted in fulfillment of Project 12120 ERF, under the partial sponsorship of the U.S. Environmental Protection Agency.

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