Proceedings of a symposium at the 210th National Meeting of the American Chemical Society. Includes bibliographical references and index.

Humic and fulvic acids and organic colloidal materials in the environment / Jeffrey S. Gaffney, Nancy A. Marley, and Sue B. Clark -- Micellar nature of humic colloids / T.F. Guetzloff and James A. Rice -- The use of hollow-fiber ultrafilters for the isolation of natural humic and fulvic acids / Jeffrey S. Gaffney, Nancy A. Marley, and Kent A. Orlandini -- A new approach to the structural analysis of humic substances in water and soils : humic acid oligomers / Hans-Rolf Schulten -- NMR techniques (C, N, and H) in studies of humic substances / Jacqueline M. Bortiatynski, Patrick G. Hatcher, and Heike Knicker -- Structural characterization of humic substances using thermochemolysis with tetramethylammonium hydroxide / Jose Carlos del Rio and Patrick G. Hatcher -- Characterization of aquatic humic and fulvic materials by cylindrical internal reflectance infrared spectroscopy / Nancy A. Marley, Jeffrey S. Gaffney, and Kent A. Orlandini -- Data treatments for relating metal-ion binding to fulvic acid as measured by fluorescence spectroscopy / Michael D. Hays, David K. Ryan, Stephen Pennell, and Lisa Ventry Milenkovic -- Fluorescence spectroscopic studies of Al-fulvic acid complexation in acidic solutions / David K. Ryan, Chih-Ping Shia, and Donald V. O'Connor -- Investigation of fulvic acid-Cup2s complexation by ion-pair reversed-phase high-performance liquid chromatography with post-column fluorescence quenching titration / G. Christopher Butler and David K. Ryan -- Organic geochemistry and sources of natural aquatic foams / Margaret S. Mills, E.M. Thurman, John Ertel, and Kevin A. Thorn -- Complexing of metal ions by humic substances / Ying-Jie Zhang, Nicholas D. Bryan, Francis R. Livens, and Malcolm N. Jones -- A comparison of the dissociation kinetics of rare earth element complexes with synthetic polyelectrolytes and humic acid / Sue B. Clark and Gregory R. Choppin -- Isotopic characterization of humic colloids and other organic and inorganic dissolved species in selected groundwaters from sand aquifers at Gorleben, Germany / M. Ivanovich, M. Wolf, S. Geyer, and P. Fritz -- Solution and solid state p13sC NMR studies of alginic acid binding with alkaline earth, lanthanide, and yttrium metal ions / A.E. Irwin, C.M. De Ramos, and B.E. Stout -- Role of humic substances and colloids in the behavior of radiotoxic elements in relation to nuclear waste disposal : confinement or enhancement of migration / Valérie M. Moulin, Christophe M. Moulin, and Jean-Claude Dran -- Immobilization of actinides in geomedia by phosphate precipitation / Mark P. Jensen, Kenneth L. Nash, Lester R. Morss, Evan H. Appelman, and Mark A. Schmidt -- Enhancement of the water solubility of organic pollutants such as pyrene by dissolved organic matter / Howard H. Patterson, Bruce MacDonald, Feng Fang, and Christopher Cronan -- Covalent binding of aniline to humic substances : comparison of nucleophilic addition, enzyme-, and metal-catalyzed reactions by p15sN NMR / Kevin A. Thorn, W.S. Goldenberg, S.J. Younger, and E.J. Weber.