Humic Substances: Structures, Properties and Uses

Edited by G. Davies;
Northeastern University, Boston, USA

E. A. Ghabbour;
Northeastern University, Boston, USA

The properties of humic substances in plants, soils and sediments regulate the environment and affect all aspects of life, yet they are nature's least understood materials. Current work in this field applies front-line instruments and techniques to solve the 200-year old mystery of humic substance structures and their relationship to macro- and microscopic properties.

This book is unique in highlighting environmental processes from a molecular viewpoint, focusing on the use of chemical and physical methodology to explain this complex subject matter and emphasizing the most up-to-date research. It covers aspects of the biology, chemistry, physics and physiology of humic substance macromolecules, includes the very latest in high level molecular modelling and teaches techniques of particular relevance to agriculture and agronomy.

The growing industrial use of humic substances, for plant stimulation, alternative energy sources and bioremediation is also featured.

Humic Substances: Structures, Properties and Uses takes a fresh approach to a very important subject area and will appeal to researchers and postgraduates from a broad spectrum of disciplines.


Humic Substances: Progress Towards More Realistic Concepts of Structures; Use of 13C NMR and FTIR for Elucidation of Degradation Pathways During Natural Litter Decomposition and Composting. II. Changes in Leaf Composition After Senescence; Use of 13C NMR and FTIR for Elucidation of Degradation Pathways During Natural Litter Decomposition and Composting. III. Characterization of Leachate from Different Types of Leaves; Use of 13C NMR and FTIR for Elucidation of Degradation Pathways During Natural Litter Decomposition and Composting. IV. Characterization of Humic and Fulvic Acids Extracted from Senescent Leaves; Characterization and Properties of Humic Substances Originating from an Activated Sludge Wastewater Treatment Plant; Structure and Elemental Composition of Humic Acids: Comparison of Solid-State 13C NMR Calculations and Chemical Analyses; Comparison of Desorption Mass Spectrometry Techniques for the Characterization of Fulvic Acid; The Relative Importance of Molecular Size and Charge Differences in Capillary Electrophoresis of Humic Substances of Different Origin; Fluorescence Decay of Humic Substances. A Comparative Study; Effect of Lime Additions to Lake Water on Natural Organic Matter (NOM) in Lake Terjevann, SE Norway: FTIR and Fluorescene Spectral Changes; A Computational Chemistry Approach to Study the Interactions of Humic Substances with Mineral Surfaces; Determination of Trace Metals Bound to Soil Humic Acid Species by Size Exclusion Chromatography and Inductively Coupled Plasma-Mass Spectrometry; Formation and Voltammetric Characterization of Iron-Humate Complexes of Different Molecular Weight; Nonlinearity and Competitive Sorption of Hydrophobic Organic Compounds in Humic Substances; Adsorption of a Plant- and a Soil-derived Humic Acid on the Common Clay Kaolinite; Effect of Dissolved Organic Matter on the Movement of Pesticides in Soil Columns; Generation of Free Radicals by Humic Acid: Implications for Biological Activity; Humic Acid as a Substrate for Alkylation; Humic Substances for Enhancing Turfgrass Growth; Greenhouse Gas Dilemma and Humic Acid Solution; Subject Index.

Special Publication No. 228

Hardcover xii + 260 pages
ISBN 0 85404 704 2

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