Cyclic organic carbonate modification of sodium bentonite for enhanced containment of hyper saline leachates

Fehervari, Andras, Gates, Will P., Turney, T.W., Patti, A.F. and Bouazza, A. 2016, Cyclic organic carbonate modification of sodium bentonite for enhanced containment of hyper saline leachates, Applied clay science, vol. 134, no. 1, pp. 2-12, doi: 10.1016/j.clay.2016.09.007.

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Title Cyclic organic carbonate modification of sodium bentonite for enhanced containment of hyper saline leachates
Author(s) Fehervari, AndrasORCID iD for Fehervari, Andras
Gates, Will P.ORCID iD for Gates, Will P.
Turney, T.W.
Patti, A.F.
Bouazza, A.
Journal name Applied clay science
Volume number 134
Issue number 1
Start page 2
End page 12
Total pages 11
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2016-12
ISSN 0169-1317
Keyword(s) bentonite
bentonite modification
osmotic desiccation
glycerol carbonate
propylene carbonate
Science & Technology
Physical Sciences
Chemistry, Physical
Materials Science, Multidisciplinary
Materials Science
Summary Two cyclic organic carbonates (COC), propylene carbonate (PC) and glycerol carbonate (GC), were investigated as saline-resistant modifying agents of Na+-montmorillonite using X-ray diffraction (XRD) and Fourier transform infrared (FTIR). PC has been studied previously and has been used as an effective amendment material of Na+-bentonite for saline applications. In this research GC is proposed as a more effective modifying agent for containing hyper saline leachates. Na+-montmorillonite was reacted with up to 1 N sodium chloride (NaCl) and calcium chloride (CaCl2) salt solutions to assess changes in the interlayer spacing (i.e., d-value of the 001 reflection in XRD traces) due to osmotic desiccation, as well as to investigate the mechanism and strength of bonding between GC/PC and Na+-montmorillonite by FTIR. GC/Na+-montmorillonite was strongly resistant against strongly saline sodic salt solution compared to PC/Na+-montmorillonite. CaCl2 solution had a more detrimental effect on COC modified Na+-montmorillonite, however, GC/Na+-montmorillonite appeared to retain more intercalated COC than PC/Na+-montmorillonite when leached by strong calcic salt solutions.
Language eng
DOI 10.1016/j.clay.2016.09.007
Field of Research 099999 Engineering not elsewhere classified
Socio Economic Objective 0 Not Applicable
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2016, Elsevier
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