Supercritical extraction of organic compounds from aqueous solutions
Thesis/Dissertation
·
OSTI ID:6727210
We have investigated three model contaminants; phenol, a phenolic mixture, and petroleum creosote. In each case, static equilibrium supercritical extractions were conducted as a function of pressure and temperature using carbon dioxide as the solvent. Samples from the extractor were taken and analyzed to determine distribution coefficients. The Peng-Robinson equation of state with a modified mixing rule was used to correlate the data and provide a qualitative prediction of the effect of adding a small amount of an entrainer to the system. These predictions were verified experimentally. In addition, short-term bioassays were used to monitor the reduction in residual toxicity of the water and provide an alternative method of determining a lumped distribution coefficient. The results of this study indicate that supercritical fluid extraction is a viable technique for removing both single component and multicomponent contaminants from aqueous solutions.
- Research Organization:
- Texas A and M Univ., College Station, TX (USA)
- OSTI ID:
- 6727210
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020900* -- Petroleum-- Environmental Aspects
54 ENVIRONMENTAL SCIENCES
540320 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
560300 -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AQUEOUS SOLUTIONS
AROMATICS
BIOASSAY
CLEANING
CREOSOTE
DECONTAMINATION
DISPERSIONS
EQUATIONS
EXTRACTION
FORECASTING
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
MIXTURES
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHENOL
PHENOLS
POLLUTION
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
THERMODYNAMICS
TOXICITY
WATER
WATER POLLUTION
020900* -- Petroleum-- Environmental Aspects
54 ENVIRONMENTAL SCIENCES
540320 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
560300 -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AQUEOUS SOLUTIONS
AROMATICS
BIOASSAY
CLEANING
CREOSOTE
DECONTAMINATION
DISPERSIONS
EQUATIONS
EXTRACTION
FORECASTING
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
MIXTURES
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHENOL
PHENOLS
POLLUTION
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
THERMODYNAMICS
TOXICITY
WATER
WATER POLLUTION