Ion-expulsion ultrafiltration to remove chromate from wastewater

Journal Article · Thu Oct 01 00:00:00 EDT 1992 · Separation Science and Technology; (United States)

DOI:https://doi.org/10.1080/01496399208019446· OSTI ID:6959467

Krehbiel, D K; Scamehorn, J F; Ritter, R; Christian, S D; Tucker, E E ^[1]

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

In ion expulsion ultrafiltration, a water-soluble colloid with the same charge as the target ion to be removed is added to water. This stream is then treated by ultrafiltration with membrane pores small enough to reject the colloid. In this study, chromate was removed from water using polystyrene sulfonate as the colloid in both batch-stirred cell and spiral-wound ultrafiltration devices. At very low pressures, Donnan equilibrium could be used to describe the permeate chromate concentration. As the pressure increased, diffusional effects caused the separation to become poorer. A spiral-wound unit resulted in a much higher separation efficiency than a stirred cell in this process.

• OSTI ID: 6959467
• Journal Information: Separation Science and Technology; (United States), Vol. 27:13; ISSN 0149-6395
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
54 ENVIRONMENTAL SCIENCES
CHROMATES
ULTRAFILTRATION
COLLOIDS
EXPERIMENTAL DATA
INDUSTRIAL WASTES
MATERIALS RECOVERY
MEMBRANES
POLYETHYLENES
REMOVAL
SULFONATES
TOXIC MATERIALS
WASTE WATER
WATER TREATMENT
CHROMIUM COMPOUNDS
DATA
DISPERSIONS
FILTRATION
HAZARDOUS MATERIALS
HYDROGEN COMPOUNDS
INFORMATION
LIQUID WASTES
MANAGEMENT
MATERIALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
ORGANIC SULFUR COMPOUNDS
OXYGEN COMPOUNDS
POLYMERS
POLYOLEFINS
PROCESSING
SEPARATION PROCESSES
TRANSITION ELEMENT COMPOUNDS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
WATER
320305* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management
540220 - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)