UTILIZATION OF UNIVERSITY OF FLORIDA FLUX METER FOR ...

UTILIZATION OF UNIVERSITY OF FLORIDA FLUX METER FOR ESTIMATING ARSENIC CONTAMINATION IN GROUNDWATER

By PRACHEE GUPTA

A THESIS PRESENTED TO THE GRADUATE SCHOOL OF THE UNIVERSITY OF FLORIDA IN PARTIAL FULFILLMENT

OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE

UNIVERSITY OF FLORIDA 2004

Copyright 2004 by

Prachee Gupta

ACKNOWLEDGMENTS I would like to express my sincere gratitude to Dr. Clayton J. Clark II, chairperson of my supervisory committee, for all his guidance and support throughout the project. I am very grateful to my committee, members, Dr. Kirk Hatfield and Dr. Michael Annable, for all their valuable guidance, suggestions and encouragement. I would also like to thank Dr. Jaehyun Cho, Dr. Mark Newman and Mr. Harald Klammler for constant guidance in performing laboratory experiments and Dr. Tait Cherenji for providing basic data for computer model simulation. I greatly appreciate the help of Mr. Thomas Luongo for sample analysis. Thanks go to the students of Water Resource Research Center for the support I received throughout. Finally, I want to thank my parents and friends who encouraged me throughout my academic career.

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TABLE OF CONTENTS

page

ACKNOWLEDGMENTS ................................................................................................. iii

LIST OF TABLES............................................................................................................. vi

LIST OF FIGURES .......................................................................................................... vii

ABSTRACT..................................................................................................................... viii

CHAPTER

1 INTRODUCTION......................................................................................................1

General ........................................................................................................................1 Purpose and Objectives...............................................................................................3

2 THEORETICAL BACKGROUND ...........................................................................4

Advective-Dispersive Transport of Reactive Solutes .................................................4 Linear Isotherm..................................................................................................4 Non-linear (Freundlich Isotherm) ......................................................................5 Non-linear (Langmuir Isotherm)........................................................................6

University of Florida Flux Meter................................................................................6 Estimating Fluid Flux ........................................................................................7 Estimating Solute Mass Flux.............................................................................9

3 LITERATURE REVIEW.........................................................................................12

Occurrence of Arsenic ..............................................................................................12 Fate and Transport of Arsenic...................................................................................13 Adsorption Characteristics of Arsenic ......................................................................15 Laboratory Analysis..................................................................................................18

Adsorption Isotherms ......................................................................................18 Extraction and Analysis:..................................................................................19 Flux Meter Analysis..........................................................................................19 Computer Model Simulation.....................................................................................20

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4 MATERIALS AND METHODS .............................................................................22 Adsorption Isotherms................................................................................................22 Extraction Method ....................................................................................................23 Analysis Method .......................................................................................................24 Flux Meter.................................................................................................................24 Flux Meter Set-up ...........................................................................................25 Running Experiment .......................................................................................26

5 RESULTS AND DISCUSSION ..............................................................................29 Adsorption Experiments ...........................................................................................29 Extraction Experiments.............................................................................................31 Flux Meter Bench Scale Experiments.......................................................................33 Computer Simulation Results ...................................................................................35

6 CONCLUSIONS.......................................................................................................37 LIST OF REFERENCES...................................................................................................39 BIOGRAPHICAL SKETCH .............................................................................................43

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