http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Supercritical extraction of organic mixtures from soil-water slurries
although, some uncertainty in the analysis exists.
an inverse relationship to water solubility. Predictions
analysis or BPLC analysis. The total extraction for the
and an empirical correlation based on octanol-water
aqueous phase, Ki. increased as the water solubility of the
coefficients which compared well to values in the
components decreased. Ki also increased as pressure
consistently low. It seems that both the additional
consistently yielded mass balance closures over 100%. It
contaminants and the soil organic matter are acting as
entrainers to facilitate extraction. The predicted values
equilibrium distribution of the mixture and of the
experiments, the distribution between the SCF phase and the
extracted by the supercritical C02, the water, and the
extractions of a complex phenolic mixture were analyzed by
from the two phase system of water-CO2 yielded values of Ki
in closing the mass balance and yielding distribution
increased. The partition coefficient between the soil and
individual components were determined. A single stage batch
Kd, the predicted percent extractions were reasonable. The
literature. The three phase experiments, however,
of Kdwere significantly lower than those for the three
on two phase experimental data for the system of soil-CO2
partition coefficients. These predictions were reasonable;
phase experimental data and theoretical correlations. The
phase, but because the model is more sensitive to Ki than
phenolic mixture. A four component phenolic mixture was
polynuclear aromatic hydrocarbons (PAHS) was predicted based
soil-water slurries. The extent of extraction and the
successfully extracted from two phase and three phase
Supercritical C02was used to extract orgamc rruxtures from
systems and analyzed by BPLC. For the three phase system
the water, Kd, decreased as temperature increased and showed
three phase distribution for the extraction of a mixture of
three phase system of soil-water-CO2 was predicted from two
TOC. The two phase extractions from water were successful
vessel was used to perform the extractions, and analyses
was determined that the soil organic matter was being
were performed using either total organic carbon (TOC)
which compared well to those for the three phase, but were