Batch- and column-extraction procedures for organics in solid wastes
Because of the possibility of contamination of aquifiers by solid waste leachates, it is important to develop laboratory extraction procedures which predict the dispersion of organic materials from landfills. This paper presents the results of a study comparing five laboratory extraction procedures with respect to the organic content of the extract. Nine solid wastes, representing a wide variety of matrices, were considered. The extraction procedures used were: the EPA-EP, a distilled water extractant, a citrate buffer extractant, an extractant containing a sodium ion-exchange resin, and an upward-flow column extraction test. Organic analysis of the batch extracts was carried out by isolation/concentration of the leachates with XAD-2 resin, followed by gas chromatography on fused silica capillary columns. In the case of the upward-flow column extraction, a cartridge containing XAD-2 was plced directly at the column exit; the resin was isolated/concentrated in a manner identical to the batch extracts. The results were assessed both in terms of total chromatographable organics (TCO) and in terms of the levels of individual compounds. The column technique gave consistently higher results in terms of TCO. This effect is in large measure due to enhanced recovery of highly volatile compounds and nonpolar compounds. The results of the extraction of individual compounds were less consistent. The recovery of carboxylic acids, for example, depended primarily on pH. The recovery of volatile organics, on the other hand, was more closely related to the extraction vessel used than to the extractant. Thus, it may be concluded that the column procedure most aggressively extracted organics from the solid wastes. However, the chemical nature of the organic material in the solid waste determines which of the batch extraction procedures is most aggressive.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5581216
- Report Number(s):
- CONF-820132-1; ON: DE82011523
- Resource Relation:
- Conference: ASTM D-34 meeting, Orlando, FL, USA, 28 Jan 1982
- Country of Publication:
- United States
- Language:
- English
Similar Records
Synthesis, pathways, effects, and fate of chlorination by-products in freshwater, estuarine and marine environments. Annual report, September 10, 1976--September 30, 1977
Comparison for laboratory batch methods and large columns for evaluating leachate from monofilled solid wastes
Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ORGANIC COMPOUNDS
EXTRACTION
SANITARY LANDFILLS
SIMULATION
SOLID WASTES
LEACHING
AQUIFERS
CARBOXYLIC ACIDS
CONTAMINATION
ENVIRONMENTAL TRANSPORT
EXTRACTION COLUMNS
GAS CHROMATOGRAPHY
LEACHATES
MASS SPECTROSCOPY
RESINS
SEPARATION PROCESSES
CHROMATOGRAPHY
DISPERSIONS
DISSOLUTION
EXTRACTION APPARATUSES
MANAGEMENT
MASS TRANSFER
MIXTURES
ORGANIC ACIDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
SEPARATION EQUIPMENT
SOLUTIONS
SPECTROSCOPY
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
510200* - Environment
Terrestrial- Chemicals Monitoring & Transport- (-1989)
400105 - Separation Procedures