Lab Testing and Field Implementation of Soil Flushing

0,97

MB

76

stron

6503

ID

Purdue University, Radiological and Environmental Management

2007

rok

Table of Contents

Chapter 1. Introduction and Problem Statement 1

1.1 Background Information and Problem Statement 1

NAPL Behavior 2

Optimizing Cosolvent Enhanced NAPL Solubilization . 3

Benefits of Ethyl Lactate as the Biofriendly Solvent of Choice. 4

1.2 Research Scope and Approach. 5

1.3 Objectives and Purpose of the Study . 6

1.4 References 7

Chapter 2. Flux-mass Relationship with Sequential DNAPL Release Events 9

2.1 Introduction 9

2.2 Materials and methods 10

2.3 Results and discussion 12

PCE distribution. 12

Flux versus mass relationship . 13

2.4 Conclusion 16

2.5 References 17

Chapter 3. In-Situ Flushing for DNAPL Mass Depletion Using Ethyl lactate 22

3.1 Introduction 22

3.2 Materials and methods 23

Solubility measurement 23

DNAPL mobilization experiment gradient flushing in 1-D column 24

Flushing PCE-conatminated 1-D column with 50% ethyl lactate 24

3.3 Results and Discussion . 24

Solubility enhancement with ethyl lactate 24

Fluid Properties of Binary Mixtures . 25

NAPL Mobilization & Total Trapping Number . 26

Enhanced PCE Solubilization by Flushing with Ethyl Lactate 28

Modeling of PCE elution with EL/water flushing in the column . 29

Mass Transfer Constraints for PCE Solubilization. 31

3.4 References 33

Chapter 4. Impact on Ethyl Lactate Residuals on Biodegradation of a PCE Plume 43

4.1 Introduction 43

4.3 Material and Methods . 46

Microcosm study. 46

PCE biodegradation in 1-D column 47

4.3 Results and Discussion . 48

Microcosm Biodegradation Study 48

PCE dechlorination in 1-D columns . 48

4.4 References. 51

Chapter 5: Field Site Assessments and Visits 65

Chapter 6. Conclusions and Implementation Suggestions 67

6.1 Conclusions 67

6.2 Implementation Suggestions. 68

6.3 References 70