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Colloid transport in physically and ...

Sun, Ning.

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Colloid transport in physically and geochemically heterogeneous porous media: Modeling, measurements, and parameter identification.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Colloid transport in physically and geochemically heterogeneous porous media: Modeling, measurements, and parameter identification./
Author:	Sun, Ning.
Description:	227 p.
Notes:	Chair: Menachem Elimelech.
Contained By:	Dissertation Abstracts International59-02B.
Subject:	Engineering, Environmental. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9823539
ISBN:	0591755823

Colloid transport in physically and geochemically heterogeneous porous media: Modeling, measurements, and parameter identification.
Sun, Ning.

Colloid transport in physically and geochemically heterogeneous porous media: Modeling, measurements, and parameter identification. - 227 p.

Chair: Menachem Elimelech.

Thesis (Ph.D.)--University of California, Los Angeles, 1998.

There is a growing interest in studying colloid transport and fate in groundwater because many problems of groundwater contamination and remediation are directly related to colloid transport. To date, there is no applicable model to accurately predict colloid transport in heterogeneous subsurface porous media.

ISBN: 0591755823Subjects--Topical Terms:

783782
Engineering, Environmental.

Colloid transport in physically and geochemically heterogeneous porous media: Modeling, measurements, and parameter identification.
LDR:03670nam 2200313 a 45 001 934045
005 20110509
008 110509s1998 eng d
020 $a 0591755823
035 $a (UnM)AAI9823539
035 $a AAI9823539
040 $a UnM $c UnM
100 1 $a Sun, Ning. $3 1257771
245 1 0 $a Colloid transport in physically and geochemically heterogeneous porous media: Modeling, measurements, and parameter identification.
300 $a 227 p.
500 $a Chair: Menachem Elimelech.
500 $a Source: Dissertation Abstracts International, Volume: 59-02, Section: B, page: 0811.
502 $a Thesis (Ph.D.)--University of California, Los Angeles, 1998.
520 $a There is a growing interest in studying colloid transport and fate in groundwater because many problems of groundwater contamination and remediation are directly related to colloid transport. To date, there is no applicable model to accurately predict colloid transport in heterogeneous subsurface porous media.
520 $a Systematic theoretical and experimental investigations have been carried out in this work to study colloid transport in heterogeneous porous media. A one-dimensional model was first developed to describe colloid transport in geochemically heterogeneous porous media and applied to column experiments. The good agreement between the experimental measurements and model predictions delineated the importance of geochemical heterogeneity and dynamics of particle deposition in controlling colloid transport in porous media. A more sophisticated two-dimensional model was then developed based on some of the principles used in the one-dimensional model. Subsurface geological formations were modeled as physically and geochemically heterogeneous porous media. Both layered and random distributions were used to describe heterogeneities of porous media. The colloid transport behaviors in such porous media were simulated by the model. The simulation results indicate that physical and geochemical heterogeneities can result in preferential flow of colloids in the layered porous media, while random distributions of the two heterogeneities, especially the physical heterogeneity, lead to a random behavior of colloid transport.
520 $a Parameter identification of our two-dimensional model was carried out. Sensitivity analysis was performed to quantitatively determine the important model parameters and to provide insights into parameter identification. The identifiability of model parameters was discussed by using simulated observations. The results show that hydraulic conductivity and longitudinal dispersivity can be identified from the tracer breakthrough data; however, the inverse solution for a group of four particle deposition and release parameters is not unique. It was also found that by knowing either the favorable particle deposition rate or geochemical heterogeneity and injecting colloids with long durations, a group of three parameters--the geochemical heterogeneity (or favorable particle deposition rate), unfavorable particle deposition rate, and simultaneous particle release rate--can be identified. The sensitivity analysis and parameter identification results can help researchers to design technically and economically efficient experiments to obtain the necessary observations to predict colloid transport in subsurface environments.
590 $a School code: 0031.
650 4 $a Engineering, Environmental. $3 783782
650 4 $a Geochemistry. $3 539092
650 4 $a Hydrology. $3 545716
690 $a 0388
690 $a 0775
690 $a 0996
710 2 0 $a University of California, Los Angeles. $3 626622
773 0 $t Dissertation Abstracts International $g 59-02B.
790 $a 0031
790 1 0 $a Elimelech, Menachem, $e advisor
791 $a Ph.D.
792 $a 1998
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9823539