Chemical modeling : goals, problems, approaches, and priorities / Everett A. Jenne -- Sulfur speciations and redox processes in reducing environments / Jacques Boulegue and Gil Michard -- Redox equilibria of iron in acid mine waters / Darrell Kirk Nordstrom, Everett A. Jenne, and James W. Ball -- Influence of redox environments on the mobility of arsenic in ground water / J. Gulens, D.R. Champ, and R.E. Jackson -- Solution thermochemistry of humic substances : acid-base equilibria of river water humic substances / E.M. Perdue -- Conditional stability constants for copper ions with ligands in natural waters / Constant M.G. Van Den Berg and James R. Kramer -- Ion exchange on humic materials : a regular solution approach / Joseph P. Frizado -- Chemical speciation of copper in river water : effect of total copper, pH, carbonate, and dissolved organic matter / William G. Sunda and Peter J. Hanson -- Nickel complexes with soil microbial metabolites : mobility and speciation in soils / R.E. Wildung, T.R. Garland, and H. Drucker -- Stability surface concept : a quantitative model for complexation in multiligand mixtures / Patrick Mac Carthy and Garon C. Smith -- Applicability of the local equilibrium assumption to transport through soils of solutes affected by ion exchange / Ronald V. James and Jacob Rubin -- Adsorption of lead from solution on the quartz- and feldspar-containing silt fraction of a natural streambed sediment / David W. Brown -- Oceanic elemental scavenging / Peter G. Brewer and Wei Min Hao -- Surface of goethite ([alpha]FeOOH) in seawater / Laurie Balistrieri and James W. Murray -- Speciation of adsorbed ions at the oxide/water interface / James A. Davis and James O. Leckie -- Critical review of plutonium equilibria of environmental concern / Jess M. Cleveland -- Estimated free energies of formation, water solubilities, and stability fields for schuetteite (Hgb3sOb2sSOb4s) and corderoite (Hgb3sSb2sClb2s) at 298 K / George A. Parks and Darrell Kirk Nordstrom -- Techniques of estimating thermodynamic properties for some aqueous complexes of geochemical interest / Donald Langmuir -- Critical review of the equilibrium constants for kaolinite and sepiolite / R.L. Bassett, Y.K. Kharaka, and D. Langmuir -- Ion exchange and mineral stability : are the reactions linked or separate? / J.A. Kittrick -- Silica apparent solubilities and rates of dissolution and precipitation for ca. 25 common minerals at 1À-2ÀC, pH 7.5-8.5 in seawater / David C. Hurd, Charles Fraley, and James K. Fugate -- Dissolution kinetics of silicate rocks : application to solute modeling / Art F. White and Hans C. Claassen -- Calcium phosphates : speciation, solubility, and kinetic considerations / G.H. Nancollas, Z. Amjad, and P. Koutsoukos -- Chemistry of calcium carbonate in the deep oceans / John W. Morse and Robert C. Berner -- Critical review of the kinetics of calcite dissolution and precipitation / L.N. Plummer, D.L. Parkhurst, and T.M.L. Wigley -- Trace metal bioavailability : modeling chemical and biological interactions of sediment-bound zinc / S.N. Luoma and G.W. Bryan -- Effect of the physicochemical form of trace metals on their accumulation by bivalve molluscs / Florence L. Harrison -- Relationships of activities of metal-ligand species to aquatic toxicity / V.R. Magnuson, D.K. Harriss, M.S. Sun, D.K. Taylor, and G.E. Glass -- Critical assessment of the relationship between biological thermodynamic and electrochemical availability / M. Whitfield and D.R. Turner -- Equilibrium chemistry of heavy metals in concentrated electrolyte solution / Abraham E. Van Luik and Jerome J. Jurinak -- Heterogeneous interactions of arsenic in aquatic systems / Thomas R. Holm, Marc A. Anderson, Dennis G. Iverson, and Robert S. Stanforth -- Distribution, transport, adsorption, and precipitation of inorganic phosphorus in the Genesee River / M.M. Reddy -- Equilibrium, kinetic, and chromatographic controls of the solution composition obtained during the in situ leaching of a uranium orebody / R.W. Potter, II, J.M. Thompson, M.A. Clynne, and V.L. Thurmond -- Application of geochemical kinetic data to ground-water systems / A tuffaceous-rock system in southern Nevada -- Hans C. Claassen and Art F. White -- A preliminary comprehensive model for the chemistry of sulfidic marine sediments / Leonard Rorert Gardner -- WATEQ2 : a computerized chemical model for trace and major element speciation and mineral equilibria of natural waters / James W. Ball, Everett A. Jenne, and Darrell Kirk Nordstrom -- Chemical modeling of trace metal equilibria in contaminated soil solutions using the computer program GEOCHEM / Shas V. Mattigod and Garrison Sposito -- A comparison of computerized chemical models for equilibrium calculations in aqueous systems / D.K. Nordstrom, L.N. Plummer, T.M.L. Wigley, T.J. Wolery, J.W. Ball, E.A. Jenne, R.L. Bassett, D.A. Crerar, T.M. Florence, B. Fritz, M. Hoffman, G.R. Holdren, Jr., G.M. Lafon, S.V. Mattigod, R.E. McDuff, F. Morel, M.M. Reddy, G. Sposito, and J. Thrailkill.