Determination of phenolic priority pollutants utilizing permeation sampling method
A passive permeation sampling method for the determination of phenolic priority pollutants in water was developed. Phenols in an aqueous solution permeate a polymeric membrane and are collected on a solid adsorbent in a sampling device. Both solvent and thermal desorption techniques were employed to recovery phenolic pollutants collected. In the solvent desorption, phenolic compounds collected on the XAD-7 resin, and then desorbed by acetonitrile. In the thermal desorption, phenolic compounds collected on Tenax-TA were recovered thermally, Separation and quantification is achieved by a SPB-5 capillary column gas chromatography using a flame ionization detector. There are linear relationships between the amount of phenolic compounds collected and the products of the exposure times and concentrations over the range from 5 ppb to 20 ppm with precisions no worse than 13%. The permeation rates of the phenolic pollutants depend upon the exposure temperature, solution pH and membrane area. Samples collected can be stored for up to two weeks without loss. This method provides a simple, convenient and inexpensive way for monitoring the time-weighted-average concentration without the use of a pumping system. An automated sampler which combines the permeation and the thermal desorption techniques together was also developed for water sample obtained from grab sampling. The on-line setup provides a high degree of automation. Detection limits at 10 ppb can be achieved using this sampler.
- Research Organization:
- Akron Univ., OH (United States)
- OSTI ID:
- 5546928
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
PHENOLS
MEASURING METHODS
ECOLOGICAL CONCENTRATION
GAS CHROMATOGRAPHY
MATERIALS RECOVERY
SAMPLING
WATER POLLUTION
AROMATICS
CHROMATOGRAPHY
HYDROXY COMPOUNDS
MANAGEMENT
ORGANIC COMPOUNDS
POLLUTION
PROCESSING
RECOVERY
SEPARATION PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)