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Ion elutriation of silver and free cyanide from wastewater.

Authors
Nehl-FH; Tom-D; Atkinson-GB
Source
Reno, NV: U.S. Department of the Interior, Bureau of Mines, RI 9601, 1995 Jan; :1-17
Link
NIOSHTIC No.
10005620
Abstract
Ion elutriation was used to extract silver cyanide complexes and free cyanide from aqueous streams containing up to 10 ppm silver and 5 ppm free cyanide. Screening tests selected nine of 350 different surfactants for further, larger scale experiments. The screening procedure used 0.1 of each of the surfactants in 300 mL of synthetic wastewater. Air was sparged into the test cell at 50 cc/min. The most effective surfactants lowered the silver and free cyanide concentrations to less than 0.5 ppm in 1 h or less. These surfactants were quaternary amine salts with one long chain (C12-C18) organic group and three methyl groups.
Keywords
Ions; Extraction; Surfactants; Concentration-Composition; Sampling; Chemical-analysis; Waste-water-treatment; Materials-recovery; Silver-compounds; Cyanide
Publication Date
19950101
Document Type
Report of Investigations
Fiscal Year
1995
NTIS Accession No.
PB96-135496
NTIS Price
A03
Identifying No.
RI-9601
NIOSH Division
RERC
Source Name
Reno, NV: U.S. Department of the Interior, Bureau of Mines, RI 9601
State
NV
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