Geochimica et Cosmochimica Acta, 1999, V 63, N 19-20.

pp vi-vi
Executive Editor's Editorial
K Turekian

pp vii-vii
Preface
S Stipp

pp viii-x
Introduction of Werner Stumm for the 1998 V.M Goldschmidt Medal
J Morgan

pp xi-xii
Acceptance speech for the 1998 V.M. Goldschmidt Medal
B Wehrli

pp 2891-2901
Uranium(VI) sorption to hematite in the presence of humic acid
Lenhart

pp 2903-2917
Natural organic matter at oxide/water interfaces:  
Complexation and conformation
Au, O'Melia

pp 2919-2928
Reduction of iron(III) minerals by natural organic 
matter in groundwater
SA Banwart

pp 2929-2938
Competitive sorption of copper and lead at the 
oxide-water interface:Implications for surface site density
Christl, R Kretzschmar

pp 2939-2955
Surface catalysis of uranium (VI) reduction by Iron (II)
Van Cappelen

pp 2957-2969
Outer sphere adsorption of Pb(II)EDTA on goethite
Bargar

pp 2971-2987
The mechanism of cadmium surface complexation on 
iron oxyhydroxide minerals
SR Randall

pp 2989-3002
Effect of inorganic- and organic ligands on t
he mechanism of cadmiums orption to goethite
Collins, KV Ragnarsdottir

pp 3003-3008
Effect of hydroxamate siderophores on Fe release a
nd Pb(II) adsorption by goethite
Kraemer

pp 3009-3015
The relationship between molecular structure and 
ion adsorption on variable charge minerals
Rietra, W Van Riemsdijk

pp 3017-3024
Dissolution of beta-MnOOH particles by ligands: Pyrophosphate,
ethylenediaminetetraacetate, and citrate
Klewicki, Morgan

pp 3025-3038
XPS study of reductive dissolution of birnessite by oxalate:  
Rates and mechanistic aspects of dissolution and redox 
processes
D Banerjee

pp 3039-3048
A consistent model for surface complexation on birnessite (
delta-MnO2) and its application to a column experiment
CAJ Appelo

pp 3049-3057
Pyrolusite surface transformations measured in 
real-time during the reactive transport of Co(II)EDTA2-
Fendorf

pp 3059-3067
Competitive adsorption of metal cations onto two g
ram positive bacteria:Testing the chemical equilibrium model
Fowle

pp 3069-3076
On the chemistry of the Keggin Al13 polymer-kinetics 
of proton-promoted decomposition
G Furrer

pp 3077-3085
Surface acidity constants of alphaAl2O3 between 25 
and 70 degrees C
WE Halter

pp 3087-3096
Calcium adsorption at the rutile-water interface:  
A potentiometric study in NaCl media to 250degreesC
Ridley

pp 3097-3103
The oxidative dissolution mechanism of uranium dioxide.  
I.  The effect of temperature in hydrogen carbonate medium
J De Pablo

pp 3105-3119
Low-temperature thermodynamic model for the system 
Na2CO3-MgCO3-CaCO3- H20
E Konigsberger

pp 3121-3131
Toward a conceptual model of the calcite surface: 
Hydration, hydrolysis and surface potential
SLS Stipp

pp 3133-3143
Dolomite surface speciation and reactivity in aquatic systems
Pokrovsky, JR Schott

pp 3145-3152
Structure and growth of stearate monolayers on calcite:  
First results of an in-situ X-ray reflectivity study
Fenter

pp 3153-3157
X-ray standing wave study of arsenite incorporation 
at the calcite surface
Cheng, Sturchio

pp 3159-3169
Evidence for aqueous clusters as intermediates 
during zinc sulfide for mation
Luther, Iii

pp 3171-3182
The oxidation of pyrite at pH 7 in the presence 
of reducing and non-reducing Fe(III)-chelators
S Peiffer

pp 3183-3191
Acidic dissolution of plagioclase.  
In-situ observations by hydrothermal
atomic force microscopy
G Jordan

pp 3193-3203
The role of Al in the formation of secondary Ni 
precipitates on pyroph yllite, gibbsite, talc, and 
amorphous silica: A DRS study Scheinost

pp 3205-3215
X-ray absorption spectroscopy investigation of 
aqueous Co(II) and Sr(II) sorption at clay-water interfaces
Chen, Hayes

pp 3217-3227
Experimental and modelling studies of caesium sorption 
on illite
C Poinssot

pp 3229-3246
Structure and composition of copper(II)-2,2'-bipyridine 
sorption complexes on amorphous SiO2
Cheah

pp 3247-3259
The effect of microbial glucose metabolism on bytownite 
feldspar dissolution rates between 5 and 35oC
Welch

pp 3261-3275
Mechanism of kaolinite dissolution at room temperature 
and pressure.  Part II. Kinetic study
FJ Huertas

pp 3277-3291
The effect of temperature on experimental and natural 
chemical weathering rates of granitoid rocks
White

pp 3293-3300
Direct measurement of the combined effects of lichen, r
ainfall, and temperature on silicate weathering
Brady

pp 3301-3310
Coal weathering and the geochemical carbon cycle
S Chang

pp 3311-3319
Geochemical factors controlling free Cu ion concentrations 
in river water
TF Rozan

pp 3321-3336
29mporal variability of trace metals in New Jersey 
pinelands streams:Relationships to discharge and pH
Sherrell

pp 3337-3347
Resolving uncertainty in chemical speciation determinations
Smith, JR Kramer

pp 3349-3356
Calcite dissolution in two deep eutrophic lakes
Ramisch, B Wehrli

pp 3357-3372
Accumulation of mantle gases in a permanently stratified 
volcanic lake (Lac Pavin, France)
W Aeschbach-Hertig

pp 3373-3378
Chemical influences on trace metal-sulfide interactions i
n anoxic sediments
Morse

pp 3379-3394
Predicting arsenic concentrations in the porewaters o
f buried uranium mill tailings
Langmuir

pp 3395-3406
A TEM study of samples from acid mine drainage systems:  
Metal-mineral association with implications for transport
Hochella, Jr.

pp 3407-3416
Apparent solubilities of schwertmannite and ferrihydrite 
in natural stream waters polluted by mine drainage
JY Yu

pp 3417-3427
Iron control by equilibria between hydroxy-green rusts 
and solutions in hydromorphic soils
G Bourrie

pp 3429-3441
Halocarbons in the environment:  Estimates of 
thermodynamic properties for aqueous chloroethylene species and their
stabilities in natural settings Haas

pp 3443-3449
Spectroscopic investigation of the formation of PuO2Cl+ and PuO2Cl2o in
NaCl solutions and application for natural brines
Runde

pp 3451-3455
Evidence for the production of hydrogen peroxide in rainwater 
by lightning during thunderstorms
Zuo

pp 3457-3466
Contrasting behavior of tungsten and molybdenum in the 
Okinawa trough, the East China Sea and the Yellow Sea
Y Sohrin

pp 3467-3475
Geochemical investigation of phosphorus and nitrogen in 
the hypersaline Dead Sea
Stiller, ARIE Nissenbaum

pp 3477-3485
Francolite authigenesis in California continental slope 
sediments and its implications for the marine P cycle
Kim, Kastner

pp 3487-3497
The solubiltiy of iron hydroxide in sodium chloride solutions
Liu, Millero