Humic Matter in Soil and the Environment: Principles and Controversies, Second Edition, 2nd Edition (Hardback) book cover

Humic Matter in Soil and the Environment

Principles and Controversies, Second Edition, 2nd Edition

By Kim H. Tan

CRC Press

495 pages | 69 B/W Illus.

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pub: 2014-06-10
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The field of humic matter research has undergone drastic changes in concepts and principles since the first edition of Humic Matter in Soil and the Environment: Principles and Controversies was published more than a decade ago. Still the only book of its kind specifically addressing humic acid principles and controversies, the Second Edition presents the newest advances in humic acid science. Eleven new and rewritten chapters replace the original nine, with updated material representing modern humic acid chemistry. This includes the delineation of organic matter, humus, and humic matter.

The book begins by considering organic matter as a whole, describing terrestrial and aquatic organic matter. It examines humus as a mixture of humified and nonhumified organic matter, focusing also on the importance of the nonhumified fraction—plant biopolymers in their original or slightly decomposed forms—as raw materials for formation of the humic fraction. The book then presents concepts of humic matter, referred to as humic acid, covering a range of ideas from traditional views of biopolymers to the latest concepts based on micellar, supramolecular, and nanotube chemistry. The author presents the major pathways of humification and discusses humification theories. He also examines the extraction, isolation, and fractionation of humic matter.

The book reviews the chemical composition and model structures of humic acids, the chemical and spectroscopic characterization of humic substances, and the electrochemical properties of humic matter. It also addresses the agronomic, environmental, and industrial (including pharmaceutical) importance of humic matter. This revised and updated edition continues the tradition of providing comprehensive coverage of the genesis, extraction, properties, and impacts of humic matter.

Table of Contents

Issue of Organic Matter

Concept of Organic Matter

Issue of Biomass

Terrestrial and Aquatic Organic Matter

Issue of Dissolved Organic Matter or DOM

Effect of Organic Matter on Ecology and Water Chemistry

Issue of Acronyms

Concept of Humus

Issue of Humus

Nonhumic Fraction of Humus

Humic Fraction of Humus

Issue of Glomalin

Concepts of Humic Matter

Overview: From Biopolymers to Nanotube Supramolecular Assemblages

Biopolymer Concept

Operational Concept

Issue of Real Compounds

Micellar Concept

Supramolecular Concept

Nanotube Membrane Concept

Nature and Distribution of Humic Matter

Historical Background: Era of Ulmic, Crenic, and Geic Acids

Distribution of Humic Matter

Classification of Humic Matter

Genesis of Humic Matter

Major Pathways of Humification

Precursors of Humic Matter

Theories of Humification

Statistical Modeling of Humification

Extraction and Fractionation of Humic Substances

Search for Extractants

Terrestrial Humic Matter

Fractionation of Humic Substances

Aquatic Humic Matter

Determination of DOC and DOM

Types of Humic Substances

Chemical Composition of Humic Matter

Elemental Composition

Group Composition

Theory of Minimum Formula Weights

Molecular Structures

Computer Modeling of Humic Acid Structures

Characterization of Humic Substances

Chemical Characterization

Molecular Weights

Ultraviolet and Visible Light Spectrophotometry

Infrared Spectroscopy

Nuclear Magnetic Resonance Spectroscopy

Electron Microscopy of Humic Matter

Electrochemical Properties of Humic Matter

Origin and Types of Electric Charges

Surface Charge Density

Electric Double Layer

Chemical Reactions and Interactions

Complex Reaction and Chelation

Bridging Mechanism

Agronomic Importance of Humic Matter

Importance in Soils

Effect on Soil Physical Properties

Effect on Soil Chemical Properties

Effect on the Soil Redox System

Effect on Soil Biological Properties

Importance in Plant Growth

Environmental and Industrial Importance of Humic Matter

Importance in the Environment

Importance in Industry

Importance as Pharmaceuticals

References and Additional Readings

Appendix A: Greek Alphabet

Appendix B: Atomic Weights of Major Elements in Soils

About the Author

Kim Howard Tan, Ph.D., is professor emeritus at the Department of Crops and Soil Science, University of Georgia, Athens, USA, where he has taught basic soils, soil chemistry, advanced soil chemistry, and methodology of soil and plant analysis for more than 25 years. His humic acid research has made him one of the authorities on humic acid chemistry and organic–inorganic interaction reactions. He was named Fellow of the American Society of Agronomy and the Soil Science Society of America and is a member of the International Union of Soil Science. Dr. Tan is an author or coauthor of more than 200 articles, abstracts, proceedings, and book chapters, as well as the author, coauthor, or editor of 13 books.

About the Series

Books in Soils, Plants, and the Environment

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Subject Categories

BISAC Subject Codes/Headings:
SCIENCE / Chemistry / General
SCIENCE / Environmental Science
SCIENCE / Life Sciences / General
TECHNOLOGY & ENGINEERING / Agriculture / General