Stability and effect of diluents in supported liquid membranes for Cr(III), Cr(VI), and Cd(II) recovery

Journal Article · Sun Oct 01 00:00:00 EDT 1989 · Separation Science and Technology; (USA)

DOI:https://doi.org/10.1080/01496398908049886· OSTI ID:6171106

Molinari, R; Drioli, E; Pantano, G ^[1]

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1. Univ. of Calabria (Italy)

Some results obtained with the aim of optimizing the permeation fluxes, separation factors, and stability of SLM's are described. A flat sheet polypropylene membrane was used in all the experiments. The ions on which the SLM's were tested were Cr(III), Cr(VI), and Cd(II). The carriers were dinonylnaphthalene sulfonic acid (DNNSA), Aliquat 336, and Alamine 336. The diluents were o-xylene, kerosene, n-heptane, and their mixtures. Among the various mixtures tested for membrane impregnation, a maximum separation factor of 15.0 by using the SLM 50% v/v DNNSA + 25% v/v o-xylene + 25% v/v kerosene was obtained. The stability of this membrane was greater than 70 hours of continuous operation. The effect of temperature in the 25-35{degree}C range was also investigated.

• OSTI ID: 6171106
• Journal Information: Separation Science and Technology; (USA), Vol. 24:12-13; ISSN 0149-6395
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
54 ENVIRONMENTAL SCIENCES
SUPPORTED LIQUID MEMBRANES
SEPARATION PROCESSES
AQUEOUS SOLUTIONS
CADMIUM
CHROMIUM
EXPERIMENTAL DATA
KEROSENE
POLYPROPYLENE
STABILITY
TEMPERATURE EFFECTS
XYLENES
ALKYLATED AROMATICS
AROMATICS
DATA
DISPERSIONS
ELEMENTS
FUELS
HYDROCARBONS
INFORMATION
LIQUID FUELS
MEMBRANES
METALS
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROLEUM PRODUCTS
POLYMERS
POLYOLEFINS
SOLUTIONS
TRANSITION ELEMENTS
400105* - Separation Procedures
540320 - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)