Aerosol Technology (properties, Behavior, And Measurement Of Airborne Particles)

AEROSOL TECHNOLOGY

An in-depth and accessible treatment of aerosol theory and its applications

The Third Edition of Aerosol Technology: Properties, Behavior, and Measurement of Airborne Particles delivers a thorough and authoritative exploration of modern aerosol theory and its applications. The book offers readers a working knowledge of the topic that reflects the numerous advances that have been made across a broad spectrum of aerosol-related application areas. New updates to the popular text include treatments of nanoparticles, the health effects of atmospheric aerosols, remote sensing, bioaerosols, and low-cost sensors. Additionally, readers will benefit from insightful new discussions of modern instruments.

The authors maintain a strong focus on the fundamentals of the discipline, while providing a robust overview of real-world applications of aerosol theory. New exercise problems and examples populate the book, which also includes:

• Thorough introductions to aerosol technology, key definitions, particle size, shape, density, and concentration, as well as the properties of gases
• Comprehensive explorations of uniform particle motion, particle size statistics, and straight-line acceleration and curvilinear particle motion
• Practical discussions of particle adhesion, Brownian motion and diffusion, thermal and radiometric forces, and filtration
• In-depth examinations of sampling and measurement of concentration, respiratory deposition, coagulation, condensation, evaporation, and atmospheric aerosols

Perfect for senior undergraduate and junior graduate students of science and technology, Aerosol Technology: Properties, Behavior, and Measurement of Airborne Particles will also earn a place in the libraries of professionals working in industrial hygiene, air pollution control, climate science, radiation protection, and environmental science.

Preface to the First Edition xi

Preface to the Second Edition xiii

Preface to the Third Edition xv

List of Principal Symbols xvii

1 Introduction 1

1.1 Definitions 2

1.2 Particle Size, Shape, and Density 5

1.3 Aerosol Concentration 8

Problems 11

References 12

2 Properties of Gases 15

2.1 Kinetic Theory of Gases 15

2.2 Molecular Velocity 18

2.3 Mean Free Path 20

2.4 Other Properties 21

2.5 Reynolds Number 24

2.6 Measurement of Velocity, Flow Rate, and Pressure 27

Problems 35

References 36

3 Uniform Particle Motion 37

3.1 Newton’s Resistance Law 37

3.2 Stokes’s Law 39

3.3 Settling Velocity and Mechanical Mobility 40

3.4 Slip Correction Factor 42

3.5 Nonspherical Particles 44

3.6 Aerodynamic Diameter 46

3.7 Settling at High Reynolds Numbers 47

3.8 Stirred Settling 54

3.9 Instruments that Rely on Settling Velocity 56

3.10 Appendix: Derivation of Stokes’s Law 58

Problems 60

References 63

4 Particle Size Statistics 65

4.1 Properties of Size Distributions 65

4.2 Moment Averages 71

4.3 Moment Distributions 72

4.4 The Lognormal Distribution 77

4.5 Log-Probability Graphs 80

4.6 The Hatch-Choate Conversion Equations 84

4.7 Statistical Accuracy 88

4.8 Appendix 1: Distributions Applied to Particle Size 89

4.9 Appendix 2: Theoretical Basis for Aerosol Particle Size Distributions 90

4.10 Appendix 3: Derivation of the Hatch-Choate Equations 90

Problems 92

References 94

5 Straight-Line Acceleration and Curvilinear Particle Motion 97

5.1 Relaxation Time 97

5.2 Straight-Line Particle Acceleration 98

5.3 Stopping Distance 101