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Title: Process for removing polychlorinated biphenyls from soil

Abstract

The present invention relates to a method of removing polychlorinated biphenyls from soil. The polychlorinated biphenyls are extracted from the soil by employing a liquid organic solvent dispersed in water in the ratio of about 1:3 to 3:1. The organic solvent includes such materials as short-chain hydrocarbons including kerosene or gasoline which are immiscible with water and are nonpolar. The organic solvent has a greater affinity for the PCB's than the soil so as to extract the PCB's from the soil upon contact. The organic solvent phase is separated from the suspended soil and water phase and distilled for permitting the recycle of the organic solvent phase and the concentration of the PCB's in the remaining organic phase. The present process can be satisfactorily practiced with soil containing 10 to 20% petroleum-based oils and organic fluids such as used in transformers and cutting fluids, coolants and the like which contain PCB's. The subject method provides for the removal of a sufficient concentration of PCB's from the soil to provide the soil with a level of PCB's within the guidelines of the Environmental Protection Agency.

Inventors:
; ;
Publication Date:
Research Org.:
Oak Ridge National Lab., TN (USA)
OSTI Identifier:
5380849
Application Number:
ON: DE85017770
Assignee:
Dept. of Energy EDB-85-149326
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 20 FOSSIL-FUELED POWER PLANTS; 01 COAL, LIGNITE, AND PEAT; CHLORINATED AROMATIC HYDROCARBONS; REMOVAL; SOILS; DECONTAMINATION; GASOLINE; KEROSENE; SEPARATION PROCESSES; SOLVENT EXTRACTION; AROMATICS; CLEANING; EXTRACTION; FUELS; HALOGENATED AROMATIC HYDROCARBONS; LIQUID FUELS; ORGANIC CHLORINE COMPOUNDS; ORGANIC COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; PETROLEUM PRODUCTS; 510200* - Environment, Terrestrial- Chemicals Monitoring & Transport- (-1989); 510600 - Environment, Terrestrial- Regulations- (-1989); 200200 - Fossil-Fueled Power Plants- Waste Management; 010800 - Coal, Lignite, & Peat- Waste Management

Citation Formats

Hancher, C.W., Saunders, M.B., and Googin, J.M. Process for removing polychlorinated biphenyls from soil. United States: N. p., 1984. Web.
Hancher, C.W., Saunders, M.B., & Googin, J.M. Process for removing polychlorinated biphenyls from soil. United States.
Hancher, C.W., Saunders, M.B., and Googin, J.M. Fri . "Process for removing polychlorinated biphenyls from soil". United States.
@article{osti_5380849,
title = {Process for removing polychlorinated biphenyls from soil},
author = {Hancher, C.W. and Saunders, M.B. and Googin, J.M.},
abstractNote = {The present invention relates to a method of removing polychlorinated biphenyls from soil. The polychlorinated biphenyls are extracted from the soil by employing a liquid organic solvent dispersed in water in the ratio of about 1:3 to 3:1. The organic solvent includes such materials as short-chain hydrocarbons including kerosene or gasoline which are immiscible with water and are nonpolar. The organic solvent has a greater affinity for the PCB's than the soil so as to extract the PCB's from the soil upon contact. The organic solvent phase is separated from the suspended soil and water phase and distilled for permitting the recycle of the organic solvent phase and the concentration of the PCB's in the remaining organic phase. The present process can be satisfactorily practiced with soil containing 10 to 20% petroleum-based oils and organic fluids such as used in transformers and cutting fluids, coolants and the like which contain PCB's. The subject method provides for the removal of a sufficient concentration of PCB's from the soil to provide the soil with a level of PCB's within the guidelines of the Environmental Protection Agency.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1984},
month = {11}
}