Sorption of polychlorodibenzo-p-dioxins to soils from water and water/methanol mixtures
The sorption of polychlorodibenzo-p-dioxins (PCDDs) from water and water/methanol mixtures was evaluated by batch shake testing. The primary objectives of this work were (1) to evaluate the applicability of the cosolvent theory to the sorption of dioxins to soils from water/methanol mixtures and (2) to utilize the cosolvent theory to obtain extrapolated estimates of the water-phase partition coefficients for the PCDDs. The CDD isomers studied were 2,3,7,8-tetra, 1,2,3,4,7-penta, 1,2,3,4,7,8-hexa, 1,2,3,4,6,7,8-hepta and octa. Six uncontaminated soils from Times Beach, MO were utilized and ranged in fraction organic carbon from 0.0066-0.077. Sorption kinetics were found to be related to soil type and fraction methanol for all PCDDs studied. A negative relationship was generally observed between the contact time required to reach equilibrium for both fractions. Sorption isotherms were generally linear up to about 50% of the PCDD solubility predicted in the liquid phase being studied.
- Research Organization:
- Maryland Univ., College Park (USA)
- OSTI ID:
- 6995709
- Country of Publication:
- United States
- Language:
- English
Similar Records
Impact of humic constituents on microbial dechlorination of polychlorinated dioxins
Transport of PCDDs, PCP and PAHs through soils in the presence of codisposed materials
Related Subjects
Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ALCOHOLS
DIOXIN
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
LAND POLLUTION
METHANOL
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXYGEN COMPOUNDS
POLLUTION
SOILS
SORPTIVE PROPERTIES
SURFACE PROPERTIES
WATER
WATER POLLUTION