Determination of polyacrylamides in coal washery effluents by ultrafiltration/site-exclusion chromatography-ultraviolet detection techniques
The use of a combined technique of ultrafiltration and aqueous size-exclusion high-performance liquid chromatography-UV detection for monitoring trace levels of residual polyacrylamide flocculants in coal washery process water is described. Flocculants of both anionic and non-ionic types in effluents are analyzed by chromatography on a TSK 5000 PW type hydrophilic and semirigid porous polymer gel with 0.05 M Na/sub 2/SO/sub 4/ in water as the mobile phase and by UV detection at 208-nm wavelength for detection. Precision studies gave a relative standard deviation of 5.8% and a precision of 2.2% at the 95% confidence level in the concentration range of 20 ppm. The lower limit of detection for the method is 1.0 ..mu..g. Prior to chromatography, fractionation and concentration of the polyacrylamide in effluents are achieved by ultrafiltration with a hollow fiber cartridge having a nominal molecular weight cutoff of 100,000, and recoveries are determined by spiking studies. The application of the techniques for the analysis of residual flocculant in a coal washery thickener feed effluent sample is described.
- Research Organization:
- CANMET, Devon, Alberta
- OSTI ID:
- 6392751
- Journal Information:
- Environ. Sci. Technol.; (United States), Vol. 21:5
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL
WASHING
WASTE WATER
ULTRAFILTRATION
ACRYLAMIDE
CHROMATOGRAPHY
COAL MINING
FLOCCULATION
SEPARATION PROCESSES
AMIDES
CARBONACEOUS MATERIALS
CLEANING
ENERGY SOURCES
FILTRATION
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
LIQUID WASTES
MATERIALS
MINING
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PRECIPITATION
WASTES
WATER
010800* - Coal
Lignite
& Peat- Waste Management