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Ion elutriation of silver and free cyanide from wastewater.
Nehl-FH; Tom-D; Atkinson-GB
Reno, NV: U.S. Department of the Interior, Bureau of Mines, RI 9601, 1995 Jan; :1-17
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.
Ions; Extraction; Surfactants; Concentration-Composition; Sampling; Chemical-analysis; Waste-water-treatment; Materials-recovery; Silver-compounds; Cyanide
Report of Investigations
NTIS Accession No.
Reno, NV: U.S. Department of the Interior, Bureau of Mines, RI 9601
Page last reviewed: March 11, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division