Use of ligand-modified micellar-enhanced ultrafiltration in the selective removal of metal ions from water

Journal Article · Fri Feb 01 00:00:00 EST 1991 · Separation Science and Technology; (United States)

DOI:https://doi.org/10.1080/01496399108050464· OSTI ID:6117992

Klepac, J; Simmons, D L; Taylor, R W; Scamehorn, J F; Christian, S D ^[1]

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1. Univ. of Oklahoma, Norman (United States)

Ligand-modified micellar-enhanced ultrafiltration (LM-MEUF) is a membrane-based separation technique which can selectively remove specific ions from an aqueous solution containing several ions of like charge. In LM-MEUF, surfactant and amphiphilic ligand are added to the contaminated water. The surfactant forms aggregates called micelles, and the ligand is selected to complex the ion of interest and to solubilize strongly in the micelles. The result is micelles containing a high fraction of the ligand and the target ion. If the surfactant is chosen to have the same charge as the target ion, other ions in solution with this same charge will not associate with the micelles, making the retention of ions by the micelles very selective. The solution is then passed through an ultrafiltration membrane with pore sizes small enough to block the passage of micelles. In this study, divalent copper is the target ion in a solution also containing divalent calcium. A cationic surfactant is used with N-n-dodecyl-iminodiacetic acid as the copper-specific ligand. Rejections of copper of up to 99.2% are observed, with no rejection of calcium, showing that LM-MEUF has almost perfect selectively, as well as high capacity in this case.

• OSTI ID: 6117992
• Journal Information: Separation Science and Technology; (United States), Vol. 26:2; ISSN 0149-6395
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
54 ENVIRONMENTAL SCIENCES
METALS
MATERIALS RECOVERY
WASTE WATER
ULTRAFILTRATION
CALCIUM
COMPLEXES
COPPER
EFFICIENCY
EXPERIMENTAL DATA
LIGANDS
MEMBRANES
MICELLAR SYSTEMS
SURFACTANTS
WATER TREATMENT
ALKALINE EARTH METALS
DATA
ELEMENTS
FILTRATION
HYDROGEN COMPOUNDS
INFORMATION
LIQUID WASTES
MANAGEMENT
NUMERICAL DATA
OXYGEN COMPOUNDS
PROCESSING
RECOVERY
SEPARATION PROCESSES
TRANSITION ELEMENTS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
WATER
320305* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management
540320 - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)