1st Edition
Physical Chemistry of Soils The Fundamentals of Soil Science
Preface
The Scientific Method and the Soil Science
What is Science?
Can Soil be a Science, and What is Needed to Study Soil Science?
Exercises
Further Reading
How to Handle Numbers in Soil Science?
Introduction
Observability, Measurability, Repeatability, and Reproducibility
Causes of Errors in Measurements
Random and Systematic Errors
Accuracy and Precision
How to Report Measurements and Experimental Uncertainties
How to Write Significative Figures by Using Scientific Notation
The Operations with the Significative Figures and the Propagation of the Error
The Integral Role of Statistical Methods in Understanding Experimental Datasets
Machine Learning in Chemistry: New Frontiers in Predictive Modeling
Exercises
Further Reading
What is the Soil
Introduction
Earth as an Apple and Soil as a Thin Apple Peel
Soil Poly-Functionality
An Objective Definition of Soil
Profiles and Horizons
The Beginning: We all are Stars’ Children
The Lithogenesis
Pedogenesis: A Mathematical Approach
Pedogenesis: A Qualitative Physical and Chemical Understanding
Exercises
Further Reading
The Hydrosphere
Introduction
The Cycle of Water
The Movement of Big Water Bodies: The Effect of Winds
The Movement of Big Water Bodies: The Effects of Salt Concentration and Temperature
The Global Conveyor Belt
Exercises
Further Reading
The Nature and Chemistry of Water
The Structure of Water: Basic Theory About Orbitals
The Structure of Water: Hybridization and Tetrahedral Geometry
The Electronic Distribution in the Water Molecule and the Hydrogen-Bond
The Structure of the Water Clusters
The Cooperative and Anti-Cooperative Nature of the Hydrogen-Bond
The Transient Nature of the Hydrogen-Bond
The Hydrogen Bond and the Anomalies of Water
The Different Forms of Ice
The Phase Diagram of Water
A Simplistic Thermodynamic Approach to the Dissolution Process in Water
Gibbs Free Energy and Activity
The Ionic Strength
The Debye-Hückel Theory: The Relationship Between Ionic Strength and Activity Coefficient
Solubility and Saturation
The Parameters for a Qualitative/Quantitative Evaluation of Solubility
Hydrophilicity and Hydrophobicity
Exercises
Further Reading
The Chemical Equilibria in Ideal Conditions
Introduction
A General Overview of the Chemical Equilibria in Ideal Conditions
The pH
The Acid-Base Equilibria in Ideal Conditions
The Buffer Capacity
The Solubility Equilibria
The Redox Equilibria in Ideal Conditions
The Graphical Representation of the Chemical Equilibria
Representing Acid-Base Equilibria
Distribution Curves for Acid-Base Species
The Titration Curves
Buffer Capacity Curves
Solubility Equilibria and Graphical Representation: Solubility vs pH
Solubility Equilibria and Graphical Representation: Solubility vs Temperature
Solubility Equilibria and Graphical Representation: The Effect of the Common Ion
The Redox Diagrams
The Redox Diagrams: How to Generate an Eh-Concentration Graph
The Redox Diagrams: The Pourbaix (Eh – pH) Diagrams
Exercises
Further Reading
The Chemical Equilibria in Non-Ideal Conditions
Foundations of Solution Equilibria: From Idealized to Real-World Conditions
Real-World Deviations from Ideal Conditions
Understanding Chemical Equilibria in Complex Non-Ideal Environments
Water Activity: The Complex Interplay of Ionic Strength and Ion Interactions
Complex Interactions Beyond Charge Density
Water Activity in Acid Solutions: A Balance of Kosmotropic and Chaotropic Effects
Water Activity and Solute Transport Dynamics in Soil Systems
Exploring Colligative Properties Through Water Activity and Solute Interactions
Beyond Ideal Solutions: Understanding Colligative Properties in Non-Ideal Conditions
A Mathematical Approach to Colligative Properties and Non-Ideal Conditions
The pH in Non-Ideal Conditions
Examples of pH in Non-Ideal Conditions
The Acid-Base Equilibria in Non-Ideal Conditions
Types of Soil Acidity and Their Role in Soil pH Management
Buffering Capacity in Non-Ideal Systems
Case Study: Sicilian Soil Buffering Properties
Key Factors Shaping Soil Buffering Capacity
Redox Reactions in Soil: Key Drivers of Soil Chemistry
Redox Reactions and Environmental Contaminants
Future Research and Perspectives
Exercises
Further Reading
The Physical Science of Soil Colloids
The Hidden World of Colloids: A Brief Introduction
Colloids Defined: Size and Behavior
The Tyndall Effect: An Insight into Colloidal Behavior
The Dynamic Equilibrium of Colloids: Forces, Classifications, and Interactions
The Gouy-Chapman-Stern Model: The Theory of the Double Layer
Stability Factors and Flocculation Mechanisms
Adsorption Properties of Soil Colloids
Exercises
Further Reading
Fundamental Soil and Colloidal Properties
Soil Texture: The Foundation of Soil Properties and Functionality
Understanding Soil Textural Classes: Sand, Silt, and Clay
The Surface Area: A General Overview
The Porosity: A Brief Introduction
How to Measure Surface Area, Porosity, and Pore Sizes: A Brief Introduction to Analytical Instruments
Soil Structure and Compaction
Soil Water Retention and Availability
Soil Bulk and Particle Density
Exercises
Further Reading
The Chemistry of Soil Colloids: The Clay Minerals
Introduction to Clay Minerals
Structural and Chemical Organization of Silicon and Aluminum in Clay Minerals
Structural Composition and Classification of Clay Minerals
Other Clay Minerals
Environmental Implications of the Clay Mineral Structure
Formation and Weathering Processes
Physical and Chemical Properties of Clay Minerals
Role of Clay Minerals in Soil Chemistry and Nutrient Cycling
Water Retention and Movement in Clay-Rich Soils
Clay Minerals and Environmental Remediation
Clay Mineral Interactions with Soil Organic Matter (SOM)
Implications for Soil Management and Agriculture
Future Directions and Research
Exercises
Further Reading
The Chemistry of Soil Colloids: The Soil Organic Matter
Introduction to Soil Organic Matter (SOM)
SOM Classification and Composition
Microbial Biomass: The Living Component of Soil Organic Matter
Exercises
Further Reading
The Telluric Air
Introduction to the Soil Gas Phase
Composition of Soil Atmosphere
Gas Exchange Mechanisms in Soil
Factors Influencing Soil Gas Dynamics
Soil Gas Exchange and its Environmental Implications
Soil Aeration and its Biological Importance
Soil Management for Optimal Gas Exchange
Implications for Carbon Sequestration and Climate Change
Exercises
Further Reading
Soil Fertility
Introduction
What Does Soil Fertility Mean?
Key Nutrients and Their Role in Plant Growth
Strategies for Maintaining and Improving Soil Fertility: Fertilizers and Amendments
Soil Fertility: A Pillar of Sustainability and Global Resilience
Exercises
Further Reading
Index
Biography
Pellegrino Conte is Full Professor of Soil Chemistry at the University of Palermo, Italy. His research focuses on the physical chemistry of soils, including surface charge, ion exchange, colloidal stability, and soil–water interactions. Author of over 150 peer-reviewed papers and several books, he serves on national evaluation committees and editorial boards, bridging fundamental chemistry with soil and environmental sciences through both teaching and research.
