Humic Substances Nature's Most Versatile Materials

About this book

Crucial components of the carbon cycle and other life processes, humic substances are found in animals, plants, coals, sediments, soils and water. This book contains a compilation of papers presented at the 2002 Humic Substances Seminar.

Contents

Part 1. Fractionation and Characterization: The State-of-the-Art 1. Use of Radioactive Tracers for the Characerization of Humic and Fulvic Acids in High Performance Size Exclusion Chromatography 2. Interpreting Capillary Electrophoresis - Electrospray/Mass Spectronomy (CZE-ESI/MS) of Suwannee River Natural Organic Matter (NOM) 3. Comparison of As-Delivered and AFFFF-Size-Fractionated Suwannee River Fulvic Acid by Time-of-Flight Mass Spectrometry 4. Molecular Fingerprinting of Aquatic Fulvic Acids by Ultra-High Resolution ESI FT-ICR Mass Spectronomy 5. The Macromolecular or Supramolecular Nature of Humic Substances: A Dynamic Light Scattering Study 6. A Proposal for the Establishment of a Database of Thermodynamic Properties of Natural Organic Matter Part 2. Hydration, Swelling and Sorption: Contributing Factors 7. Effect of Hydration/Solvation of Organic Matter on Sorption of Organic Compounds: Conception and Sorption Isotherm Model 8. Swelling of Organic Matter in Soil and Peat Samples, Water Absorption and PAH Extraction 9. Sorption of PAHs to Natural Sorbents: Imapcts of Humic and Lipid Fractions 10. Interactions and Conversions of Polycyclic Aromatic Compounds in the Process of Humification 11. Pyrolytic Study of the Bound Residues of 13C-Atrazine in Soil Size Fractions and Soil Humin 12. Phenanthrene Sorption by Clay-Humic Complexes 13. Kinetics of Absorption of 2, 4-Dichlorophenoxyacetic Acid from Humic Acid, Metal Oxides and Metal Oxide-Humic Complexes Part 3. Metal Binding and Mobility: Theory, Data and Consequences 14. Exploring the Molecular Character and Heterogeneity of Humic Substances via the Study of the Ion-Binding Process Using an Extended Polyelectrolyte Model 15. Study of Fulvic-Aluminium (III) Ion Complexes by 27 Al Solution NMR 16. Investigation of Colloidl Properties and Trace Metal Complexation Characeristics of Soil-Derived Fulvic Acids by Flow Field-Flow Fractionation-Inductively Coupled Plasma-Mass Spectrometry (Flow FFF-ICP-MS) 17. Comparison of Dialysis, Polarography and Fluorimetry for Quantification of Cobalt (II) Binding by Dissolved Humic Acid 18. Diffusion of Metal Cations in Humic Gels 19. The Role of Humic Substances in Trace Element Mobility in Natural Environments and Applications to Radionuclides 20. Influence of Humic Substances on the Migration of Actinides in Groundwater 21. Catalytic Effects of Ni-Humic Complexes on the Reductive Dehalogenation of C1 and C2 Chlorinated Hydrocarbons Part 4. Biogeochemical Effects: The Good, The Bad and The Ugly 22. Humic Substances and Their Direct Effects on the Physiology of Aquatic Plants 23. More Evidence for Humic Substances Acting as Biogeochemicals on Organisms

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Biography

Elham Ghabbour is a Senior Scientist at Northeastern University, Boston. With two decades of research experience in physical /analytical chemistry, her major interest is understanding the macro- and microstructures of humic substances with solutes and metals as probes and catalysis by HSs. Geoffrey Davies is Matthews Distinguished University Professor at Northeastern University. With research experience in physical inorganic chemistry, his major interests are the thermodynamics and kinetics of solute binding by humic substances and the development of models for HSs systems.