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Title: Electrokinetic remediation of soils contaminated with electroplating wastes

Electrokinetic remediation of soils simulated with electroplating waste contamination was investigated in two soils, kaolin and glacial till. Soil samples were contaminated with nickel, cadmium and hexavalent chromium and subjected to an external electric field for four days. Results of these experiments revealed that the soil composition plays an important role in electrokinetic remediation. Due to induced electric potential, a distinct pH gradient was developed in kaolin; however, in glacial till alkaline conditions existed throughout the soil because of its high carbonate buffering capacity. The movement of cationic metallic contaminants, Ni(II) and Cd(II), from the anode to the cathode was significant in kaolin as compared to glacial till. Because of high pH conditions near the cathode, Ni(II) and Cd(II) were precipitated in kaolin. In glacial till, however, because of alkaline conditions throughout the soil, most of Ni(II) and Cd(II) precipitated without migration. Overall, this study demonstrates that anion exchange, cation exchange and precipitation were the significant fixation mechanisms of nickel, cadmium and chromium in soils.
Authors:
;  [1] ;  [2]
  1. Univ. of Illinois, Chicago, IL (United States). Dept. of Civil and Materials Engineering
  2. Patterson Associates Inc., Chicago, IL (United States)
Publication Date:
OSTI Identifier:
376161
Report Number(s):
CONF-960426-
Journal ID: ISSN 0097-2126; TRN: IM9642%%249
Resource Type:
Conference
Resource Relation:
Conference: 58. annual meeting of the American power conference, Chicago, IL (United States), 9-11 Apr 1996; Other Information: PBD: 1996; Related Information: Is Part Of Proceedings of the American Power Conference. Volume 58-I; McBride, A.E. [ed.]; PB: 767 p.
Publisher:
American Power Conference, Chicago, IL (United States)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; SOILS; REMEDIAL ACTION; INDUSTRIAL WASTES; REMOVAL; NICKEL; CADMIUM; CHROMIUM; LAND RECLAMATION; ELECTRODYNAMICS; FARADAY INDUCTION; ELECTRIC POTENTIAL; SOIL CHEMISTRY