Surfactant-modified zeolites as permeable barriers to organic and inorganic groundwater contaminants
Conference
·
OSTI ID:162477
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.
- Research Organization:
- New Mexico Inst. of Mining and Technology, Socorro, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AR21-95MC32108
- OSTI ID:
- 162477
- Report Number(s):
- DOE/MC/32108--96/CO616; CONF-9510108--16; ON: DE96003466
- Country of Publication:
- United States
- Language:
- English
Similar Records
Surfactant-modified zeolites as permeable barriers to organic and inorganic groundwater contaminants
Fourier transform Raman spectroscopy of sorbed HDTMA and the mechanism of chromate sorption to surfactant-modified clinoptilolite
Sorption of uranium(6+) and neptunium(5+) by surfactant-modified natural zeolites
Conference
·
Sun Oct 01 00:00:00 EDT 1995
·
OSTI ID:229555
Fourier transform Raman spectroscopy of sorbed HDTMA and the mechanism of chromate sorption to surfactant-modified clinoptilolite
Journal Article
·
Wed Jul 01 00:00:00 EDT 1998
· Environmental Science and Technology
·
OSTI ID:642239
Sorption of uranium(6+) and neptunium(5+) by surfactant-modified natural zeolites
Conference
·
Thu Jul 01 00:00:00 EDT 1999
·
OSTI ID:20015861