ORGANICALLY MODIFIED CLAYS

Organically modified clays are prepared by replacing the exchangeable inorganic cations present in the natural clays. Organic cations used in this replacement process are then able to adsorb other organic compounds. Thus, an organically modified clay can adsorb organic constituents that are otherwise unaffected or possibly adversely affected by unmodified clays. Organically modified clays may be mixed with additional stabilization agents (such as cement, cement kiln dust, or fly ash) to solidify contaminated soils or organic wastes into a stable mass. The stabilized mass has improved bearing properties and a reduced potential for leaching hazardous constituents into the environment. Because organically modified clays swell in the presence of organic fluids, such as gasoline or fuel oil, they may also be used as sorbents in spill control or in liners for fuel oil tank containment areas. The sorption capabilities of a number of both unmodified and organically modified clays are compared. Data are also presented on the use of organically modified clays for organic sludge stabilization. The findings indicate the feasibility of stabilization technology for remediation of organically contaminated sites as compared with the excavate-and-remove option. The adsorption of organics by organically modified clays is critical to this process.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1989/1219/1219-015.pdf
• Record URL:
  • https://scholar.google.com/scholar_lookup?title=ORGANICALLY+MODIFIED+CLAYS&author=J.+Evans&author=S.+Pancoski&publication_year=1989
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/030904815X
• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1219, Geotechnical Engineering 1989. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • Evans, Jeffrey C
  • Pancoski, Stephen E
• Publication Date: 1989

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 160-168
• Monograph Title: Geotechnical engineering 1989
• Serial:
  • Transportation Research Record
  • Issue Number: 1219
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Adsorption; Containing equipment; Contaminants; Control; Enviromental spills; Feasibility analysis; Leaching; Organic compounds; Soil remediation; Soil stabilization; Wastes
• Uncontrolled Terms: Containment; Stabilization
• Old TRIS Terms: Liners; Organically modified clays; Spillage
• Subject Areas: Environment; Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 00494775
• Record Type: Publication
• ISBN: 030904815X
• Files: TRIS, TRB
• Created Date: Jun 30 1990 12:00AM