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Title: Silica-coated titania and zirconia colloids for subsurface transport field experiments

Abstract

Silica-coated titania (TiO{sub 2}) and zirconia (ZrO{sub 2}) colloids were synthesized in two sizes to provide easily traced mineral colloids for subsurface transport experiments. Electrophoretic mobility measurements showed that coating with silica imparted surface properties similar to pure silica to the titania and zirconia colloids. Measurements of steady electrophoretic mobility and size (by dynamic light scattering) over a 90-day period showed that the silica-coated colloids were stable to aggregation and loss of coating. A natural gradient field experiment conducted in an iron oxide-coated sand and gravel aquifer also showed that the surface properties of the silica-coated colloids were similar. Colloid transport was traced at {micro}g L{sup {minus}1} concentrations by inductively coupled plasma-atomic emissions spectroscopy measurement of Ti and Zr in acidified samples.

Authors:
; ; ;
Publication Date:
Research Org.:
Univ. of Colorado, Boulder, CO (US)
OSTI Identifier:
20080460
Resource Type:
Journal Article
Journal Name:
Environmental Science and Technology
Additional Journal Information:
Journal Volume: 34; Journal Issue: 10; Other Information: PBD: 15 May 2000; Journal ID: ISSN 0013-936X
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; GROUND WATER; WATER POLLUTION; ENVIRONMENTAL TRANSPORT; SILICA; COATINGS; TITANIUM; ZIRCONIUM; COLLOIDS; FIELD TESTS

Citation Formats

Ryan, J.N., Elimelech, M., Baeseman, J.L., and Magelky, R.D. Silica-coated titania and zirconia colloids for subsurface transport field experiments. United States: N. p., 2000. Web. doi:10.1021/es9909531.
Ryan, J.N., Elimelech, M., Baeseman, J.L., & Magelky, R.D. Silica-coated titania and zirconia colloids for subsurface transport field experiments. United States. doi:10.1021/es9909531.
Ryan, J.N., Elimelech, M., Baeseman, J.L., and Magelky, R.D. Mon . "Silica-coated titania and zirconia colloids for subsurface transport field experiments". United States. doi:10.1021/es9909531.
@article{osti_20080460,
title = {Silica-coated titania and zirconia colloids for subsurface transport field experiments},
author = {Ryan, J.N. and Elimelech, M. and Baeseman, J.L. and Magelky, R.D.},
abstractNote = {Silica-coated titania (TiO{sub 2}) and zirconia (ZrO{sub 2}) colloids were synthesized in two sizes to provide easily traced mineral colloids for subsurface transport experiments. Electrophoretic mobility measurements showed that coating with silica imparted surface properties similar to pure silica to the titania and zirconia colloids. Measurements of steady electrophoretic mobility and size (by dynamic light scattering) over a 90-day period showed that the silica-coated colloids were stable to aggregation and loss of coating. A natural gradient field experiment conducted in an iron oxide-coated sand and gravel aquifer also showed that the surface properties of the silica-coated colloids were similar. Colloid transport was traced at {micro}g L{sup {minus}1} concentrations by inductively coupled plasma-atomic emissions spectroscopy measurement of Ti and Zr in acidified samples.},
doi = {10.1021/es9909531},
journal = {Environmental Science and Technology},
issn = {0013-936X},
number = 10,
volume = 34,
place = {United States},
year = {2000},
month = {5}
}