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Title: Electrokinetic treatment of contaminated soils, sludges, and lagoons. Final report

The electrokinetic process is an emerging technology for in-situ soil decontamination, in which chemical species, both ionic and nonionic are transported to an electrode site in soil. These products are subsequently removed from the ground via collection systems engineered for each specific application. Electrokinetics refer to movement of water, ions and charged particles relative to one another under the action of an applied direct current electric field. In a porous compact matrix of surface charged particles such as soil, the ion containing pore fluid may be made to flow to collection sites under the applied field. This report describes the effort undertaken to investigate electrokinetically enhanced transport of soil contaminants in synthetic systems. These systems consisted of clay or clay-sand mixtures containing known concentration of a selected heavy metal salt solution or an organic compound. Metals, surrogate radio nuclides and organic compounds evaluated in the program were representatives of those found at a majority of DOE sites. Degree of removal of these metals from soil by the electrokinetic treatment process was assessed through the metal concentration profiles generated across the soil between the electrodes. The best removals, from about 85 to 95% were achieved at the anode side of the more » soil specimens. Transient pH change had an effect on the metal movement via transient creation of different metal species with different ionic mobilities, as well as changing of the surface characteristics of the soil medium. « less
Authors:
;
Publication Date:
OSTI Identifier:
10185835
Report Number(s):
DOE/CH--9206
ON: DE93040739; TRN: 93:023912
DOE Contract Number:
W-31109-ENG-38
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Apr 1993
Research Org:
Electro-Petroleum, Inc., Wayne, PA (United States); Lehigh Univ., Bethlehem, PA (United States). Dept. of Civil Engineering
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; 54 ENVIRONMENTAL SCIENCES; SOILS; DECONTAMINATION; SLUDGES; PROGRESS REPORT; ELECTRODYNAMICS; METALS; RADIOISOTOPES; ELECTRODES; IN-SITU PROCESSING; REMEDIAL ACTION; EQUATIONS; ADDITIVES 054000; 540230; 540220; HEALTH AND SAFETY; RADIOACTIVE MATERIALS MONITORING AND TRANSPORT; CHEMICALS MONITORING AND TRANSPORT