Cyanide recovery across hollow fiber gas membranes

Journal Article · Sat Oct 01 00:00:00 EDT 1988 · Environ. Sci. Technol.; (United States)

DOI:https://doi.org/10.1021/es00175a003· OSTI ID:6247175

Kenfield, C F; Qin, R; Semmens, M J; Cussler, E L

Solutions of certain metal cyanides can be treated with a new, four-step process described here. First, the cyanide complexes are concentrated by anion exchange. Second, they are eluted with acid to release small amounts of prussic acid (HCN). Third, the prussic acid is removed with a hollow fiber gas membrane. Fourth, the metal ions released in this way are removed by cation exchange. The prussic acid removal is rapid, so the amount of acid present at any given time can be small while the amount of solution treated per time can be large. Data given here show how the process works and elucidate the mechanisms involved.

• Research Organization: Univ. of Minnesota, Minneapolis (USA)
• OSTI ID: 6247175
• Journal Information: Environ. Sci. Technol.; (United States), Vol. 22:10
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
CYANIDES
MATERIALS RECOVERY
WASTE WATER
DECONTAMINATION
AQUEOUS SOLUTIONS
ION EXCHANGE
MEMBRANES
CLEANING
DISPERSIONS
HYDROGEN COMPOUNDS
LIQUID WASTES
MANAGEMENT
MIXTURES
OXYGEN COMPOUNDS
PROCESSING
RECOVERY
SOLUTIONS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
WATER
520200* - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)