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Aluminosilicate-coated silica sand f...

Jerez Briones, Jorge Antonio.

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Aluminosilicate-coated silica sand for reactive transport experiments.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Aluminosilicate-coated silica sand for reactive transport experiments./
Author:	Jerez Briones, Jorge Antonio.
Description:	150 p.
Notes:	Source: Dissertation Abstracts International, Volume: 66-05, Section: B, page: 2690.
Contained By:	Dissertation Abstracts International66-05B.
Subject:	Engineering, Agricultural. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3176467
ISBN:	9780542154430

Aluminosilicate-coated silica sand for reactive transport experiments.
Jerez Briones, Jorge Antonio.

Aluminosilicate-coated silica sand for reactive transport experiments. - 150 p.

Source: Dissertation Abstracts International, Volume: 66-05, Section: B, page: 2690.

Thesis (Ph.D.)--Washington State University, 2005.

Column experiments with pure minerals as porous medium are valuable tools to deduce mechanistic information on the fate and transport of reactive chemicals in the subsurface. Most commonly, silica sand is used as the model porous medium. Iron oxides have been used as well, mainly in form of iron-oxide-coated silica sand. Clay minerals, however, have only been recently used as model porous media, and the coating of aluminosilicate clay minerals on silica still needs investigation.

ISBN: 9780542154430Subjects--Topical Terms:

1019504
Engineering, Agricultural.

Aluminosilicate-coated silica sand for reactive transport experiments.
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100 1 $a Jerez Briones, Jorge Antonio. $3 1912584
245 1 0 $a Aluminosilicate-coated silica sand for reactive transport experiments.
300 $a 150 p.
500 $a Source: Dissertation Abstracts International, Volume: 66-05, Section: B, page: 2690.
500 $a Chairs: Claudio Stockle; Markus Flury.
502 $a Thesis (Ph.D.)--Washington State University, 2005.
520 $a Column experiments with pure minerals as porous medium are valuable tools to deduce mechanistic information on the fate and transport of reactive chemicals in the subsurface. Most commonly, silica sand is used as the model porous medium. Iron oxides have been used as well, mainly in form of iron-oxide-coated silica sand. Clay minerals, however, have only been recently used as model porous media, and the coating of aluminosilicate clay minerals on silica still needs investigation.
520 $a The objectives of this dissertation were (1) to develop a methodology to immobilize aluminosilicate clays (Georgia Kaolinite, Texas Smectite, and Morris Illite) on silica sand, (2) to study the hydrodynamic properties of the modified silica sand when packed into columns, and (3) to examine the fate and transport of humic acid in porous media dominated by different types of clay minerals.
520 $a We developed a method to immobilize the clay minerals on a silica support. Two polymers were used as bridging agents between the clay minerals and the silica surface; polyacrylamide (PAM) and polyvinyl alcohol (PVA). More clay could be coated over the silica sand using PVA than PAM. The clay-coated sand obtained by the PVA method was stable against pH variations between 3 to 11, whereas with the coated-sand obtained with the PAM method the clay was not stable and detached above pH 9. These two polymers did not cause a significant change in the electrophoretic mobilities of the minerals, however the wettability of illite and smectite decreased when interacting with the PVA.
520 $a Iron oxide-, clay-, and humic acid-coated sand permits to produce a porous material with similar hydraulic conductivity but different surface chemistry. The clay-coated sand caused anion exclusion during transport experiments. The hydrodynamic properties of the coated sand was evaluated using the Peclet number for each porous media. The Peclet numbers for all the porous media were similar.
520 $a The interaction between humic acids and clay minerals was studied in dynamic transport experiments, using clay-coated sand. Smectite, illite, and kaolinite were coated on silica sand using the PVA method. Humic acid breakthrough curve reached a maximum of 40% of the initial concentration in the illite- and smectite-coated sands.
590 $a School code: 0251.
650 4 $a Engineering, Agricultural. $3 1019504
650 4 $a Agriculture, Soil Science. $3 1017824
690 $a 0539
690 $a 0481
710 2 0 $a Washington State University. $3 678588
773 0 $t Dissertation Abstracts International $g 66-05B.
790 1 0 $a Stockle, Claudio, $e advisor
790 1 0 $a Flury, Markus, $e advisor
790 $a 0251
791 $a Ph.D.
792 $a 2005
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3176467