Surfactant-modified zeolites as permeable barriers to organic and inorganic groundwater contaminants

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We have shown in laboratory experiments that natural zeolites treated with hexadecyltrimethylammonium (HDTMA) are effective sorbents for nonpolar organics, inorganic cations, and inorganic anions. Due to their low cost ({approximately}$0.75/kg) and granular nature, HDTMA-zeolites appear ideal candidates for reactive, permeable subsurface barriers. The HDTMA-zeolites are stable over a wide range of pH (3-13), ionic strength (1 M Cs{sup +} or Ca{sup 2+}), and in organic solvents. Surfactant-modified zeolites sorb nonpolar organics (benzene, toluene, xylene, chlorinated aliphatics) via a partitioning mechanism, inorganic cations (Pb {sup 2+}) via ion exchange and surface complexation, and inorganic anions (CrO{sub 4}{sup 2-}, SeO{sub 4}{sup 2-},SO{sub ... continued below

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6 p.

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Bowman, R.S. & Sullivan, E.J. December 1, 1995.

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Description

We have shown in laboratory experiments that natural zeolites treated with hexadecyltrimethylammonium (HDTMA) are effective sorbents for nonpolar organics, inorganic cations, and inorganic anions. Due to their low cost ({approximately}$0.75/kg) and granular nature, HDTMA-zeolites appear ideal candidates for reactive, permeable subsurface barriers. The HDTMA-zeolites are stable over a wide range of pH (3-13), ionic strength (1 M Cs{sup +} or Ca{sup 2+}), and in organic solvents. Surfactant-modified zeolites sorb nonpolar organics (benzene, toluene, xylene, chlorinated aliphatics) via a partitioning mechanism, inorganic cations (Pb {sup 2+}) via ion exchange and surface complexation, and inorganic anions (CrO{sub 4}{sup 2-}, SeO{sub 4}{sup 2-},SO{sub 4}{sup 2-}) via surface precipitation.

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6 p.

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INIS; OSTI as DE96003466

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  • Environmental technology development through industry partnership, Morgantown, WV (United States), 3-5 Oct 1995

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  • Other: DE96003466
  • Report No.: DOE/MC/32108--96/CO616
  • Report No.: CONF-9510108--16
  • Grant Number: AR21-95MC32108
  • Office of Scientific & Technical Information Report Number: 162477
  • Archival Resource Key: ark:/67531/metadc619848

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  • December 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • Dec. 4, 2015, 12:51 p.m.

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Bowman, R.S. & Sullivan, E.J. Surfactant-modified zeolites as permeable barriers to organic and inorganic groundwater contaminants, article, December 1, 1995; United States. (digital.library.unt.edu/ark:/67531/metadc619848/: accessed July 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.