Thumbnail
Access Restriction
Open

Author Brannon, J. M. ♦ Myers, T. E. ♦ Gunnison, D. ♦ Price, C. B.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword ENVIRONMENTAL SCIENCES ♦ CHLORINATED AROMATIC HYDROCARBONS ♦ LEACHING ♦ ANAEROBIC CONDITIONS ♦ AQUEOUS SOLUTIONS ♦ COLLOIDS ♦ ELECTRIC CONDUCTIVITY ♦ ELECTRON CAPTURE ♦ EXTRACTION ♦ GAS CHROMATOGRAPHY ♦ IONS ♦ MICROORGANISMS ♦ ORGANIC COMPOUNDS ♦ PARTICULATES ♦ PARTITION ♦ QUANTITY RATIO ♦ SEDIMENTS ♦ SODIUM PHOSPHATES ♦ US SUPERFUND ♦ ALKALI METAL COMPOUNDS ♦ AROMATICS ♦ CAPTURE ♦ CHARGED PARTICLES ♦ CHROMATOGRAPHY ♦ DISPERSIONS ♦ DISSOLUTION ♦ ELECTRICAL PROPERTIES ♦ HALOGENATED AROMATIC HYDROCARBONS ♦ LAWS ♦ MIXTURES ♦ ORGANIC CHLORINE COMPOUNDS ♦ ORGANIC HALOGEN COMPOUNDS ♦ OXYGEN COMPOUNDS ♦ PARTICLES ♦ PHOSPHATES ♦ PHOSPHORUS COMPOUNDS ♦ PHYSICAL PROPERTIES ♦ POLLUTION LAWS ♦ SEPARATION PROCESSES ♦ SODIUM COMPOUNDS ♦ SOLUTIONS ♦ Environment, Aquatic- Chemicals Monitoring & Transport- (1990-) ♦ Environment, Terrestrial- Chemicals Monitoring & Transport- (1990-)
Abstract Leaching of PCB-contaminated sediment from the New Bedford Harbor Superfund Site, New Bedford, MA, was conducted to assess the long-term mobilization of PCB. Sequential batch extraction of the sediment with distilled-deionized water resulted in a progressive increase in concentrations of PCB, dissolved organic carbon, and numbers of microorganisms in the extract. Sequential extraction with saline water produced extractant PCB concentrations that were relatively constant and significantly lower than those obtained with distilled-deionized water. The PCB mobilization pattern in distilled-deionized water extractant demonstrated dependence of PCB partitioning on ionic strength (as measured by conductivity). The dependency on ionic strength was related to release of sediment organic carbon as ionic strength decreased during sequential batch extraction. The data show that organic colloids and microparticulates mobilized by changes in ionic strength significantly facilitate the release of PCBs.
ISSN 0013936X
Educational Use Research
Learning Resource Type Article
Publisher Date 1991-06-01
Publisher Place United States
Journal Environmental Science and Technology
Volume Number 25
Issue Number 6


Open content in new tab

   Open content in new tab