| Main Title |
Surface Chemical Effects on Colloid Stability and Transport through Natural Porous Media. |
| Author |
Puls, R. W. ;
Paul, C. J. ;
Clark, D. A. ;
|
| CORP Author |
ManTech Environmental Technology, Inc., Ada, OK.;Robert S. Kerr Environmental Research Lab., Ada, OK. |
| Publisher |
c1993 |
| Year Published |
1993 |
| Report Number |
EPA/600/J-93/351; |
| Stock Number |
PB93-228575 |
| Additional Subjects |
Porous media ;
Surface chemistry ;
Colloids ;
Environmental transport ;
Land pollution ;
Aquifer systems ;
Subsurface investigations ;
Particle size ;
Water pollution ;
Ground water ;
Electrodynamics ;
Scanning electron microscopy ;
Surfactants ;
Adsorption ;
Iron phosphates ;
Electrophoresis ;
Aqueons solutions ;
Experimental design ;
Reprints ;
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB93-228575 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
16p |
| Abstract |
Surface chemical effects on colloidal stability and transport through porous media were investigated using laboratory column techniques. Approximately 100nm diameter, spherical, iron oxide particles were synthesized as the mobile colloidal phase. The column packing material was retrieved from sand and gravel aquifer on Cape Cod, MA. Previous studies have indicated enhanced stability and transport of iron oxide particles due to specific adsorption of some inorganic anions on the iron oxide surface. This phenomenon was further evaluated with an anionic surfactant, sodium dodecyl sulfate. Surfactants constitute a significant mass of the contaminant loading at the Cape Cod site and their presence may contribute to colloidal transport as a significant transport mechanism at the site. Photon correlation spectroscopy, micro-electrophoretic mobility, and scanning electron microscopy were used to evaluate particle stability, mobility, and size. Adsorption of negatively charged organic and inorganic species onto the surface of the iron oxide particles was shown to significantly enhance particle stability and transport through alterations of the electrokinetic properties of the particle surface. Particle breakthrough was primarily dependent upon colloidal stability and surface charge. |
| Supplementary Notes |
Pub. in Colloids and Surfaces: A Physicochemical and Engineering Aspects, v73 p287-300 1993. Sponsored by Robert S. Kerr Environmental Research Lab., Ada, OK. |
| NTIS Title Notes |
Journal article. |
| Title Annotations |
Reprint: Surface Chemical Effects on Colloid Stability and Transport through Natural Porous Media. |
| Category Codes |
68; 68D; 48E; 48G; 99F |
| NTIS Prices |
PC A03/MF A01 |
| Primary Description |
600/15 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
329432216 |
| Origin |
NTIS |
| Type |
CAT |
