Adsorption of Metals by Geomedia II

by Barnett; Kent

• ISBN13: 9780444532121
• ISBN10: 0444532129
• Edition: 1st
• Format: Hardcover
• Copyright: 2008-02-07
• Publisher: ELSEVIER SCIENCE

Summary

Adsorption of Metals by Geomedia II serves as a needed resource for this topic which has received much attention during the past 25 years. The book provides an in-depth review of the field, followed by numerous chapters that document the current status of adsorption research for a variety of metals by geomedia ranging from individual minerals to sediments and soils. Adsorption mechanisms are detailed and precipitation is presented as a distinct sorption process. Virtually all factors affecting the extent of metal adsorption are examined, including the effects of selected anions, competition among metals, pH, metal concentration, loading, variable metal adsorption capacity, ionic strength, hydrogen exchange and stoichiometry, and solids concentration. A variety of adsorption models are briefly presented and some are used to extend laboratory studies to field sites. This is a compilation of 25 peer reviewed papers from among the 60+ platform and poster presentations of the symposium "Adsorption of Metals to Geomedia II" at the American Chemical Society (ACS) Meeting, March 27-29, 2006 in Atlanta, Georgia, USA. This symposium is a follow-up to the original held in 1996. * Learn the tools and techniques from leading academics and industry experts * One stop practical resource and guide for those in the field * Keep informed and up to date on all the latest advancements in technology

Table of Contents

Foreword	p. xi
Surface Structure and Reactivity of Iron Oxide-Water Interfaces	p. 1
Introduction	p. 2
Surface X-ray Diffraction Method: Crystal Truncation Rod (CTR) Technique	p. 4
Examples of Structural Models of Different Iron Oxide Interfaces	p. 9
Perspectives and Applications to Surface Reactivity	p. 21
Summary	p. 23
References	p. 24
Anion Sorption Topology on Hematite: Comparison of Arsenate and Silicate	p. 31
Introduction	p. 32
Arsenate Crystal Chemistry in Minerals and on Surfaces	p. 33
Silicate Crystal Chemistry as a Monomer and Small Polymer in Structures and on Surfaces	p. 38
Structure of the Hematite Surface	p. 44
Results	p. 46
Discussion	p. 56
Prospects for Further Studies	p. 59
Conclusions	p. 61
References	p. 62
Molecular Structure of Lead(II) Coprecipitated with Iron(III) Oxyhydroxide	p. 67
Introduction	p. 68
Experimental	p. 70
Experimental Results	p. 72
X-ray Absorption Modeling	p. 75
Discussion and Conclusions	p. 84
References	p. 91
Tracking the Interaction of Transition Metal Ions with Environmental Interfaces using Second Harmonic Generation	p. 95
Introduction	p. 95
Experimental	p. 97
Surface Characterization	p. 99
Results	p. 105
Ion Binding	p. 111
Environmental Implications and Summary	p. 118
References	p. 120
Prions, Metals, and Soils	p. 125
Introduction	p. 126
Geochemistry of Hotspots	p. 130
The Double Nature of the Prion Protein	p. 136
Prion Sorption and Transformation on Clays	p. 139
Horizontal Infectivity	p. 145
Conclusions	p. 146
References	p. 146
Associations between Iron Oxyhydroxide Nanoparticle Growth and Metal Adsorption/Structural Incorporation	p. 153
Introduction	p. 154
Experimental	p. 156
Results	p. 161
Discussion	p. 175
Conclusions	p. 179
References	p. 181
Temperature and Aging Effects on the Surface Speciation of Cd(II) at the Goethite-Water Interface	p. 187
Introduction	p. 188
Experimental	p. 192
Results	p. 194
Discussion	p. 197
Conclusions	p. 200
References	p. 201
Cadmium and Lead Desorption from Kaolinite	p. 205
Introduction	p. 205
Experimental	p. 208
Results	p. 213
Discussion	p. 225
Conclusions	p. 228
References	p. 229
Mechanism of Molybdenum Adsorption on Soils and Soil Minerals Evaluated Using Vibrational Spectroscopy and Surface Complexation Modeling	p. 235
Introduction	p. 236
Experimental	p. 239
Results and Discussion	p. 244
Conclusions	p. 261
References	p. 262
Blind Prediction and Parameter Uncertainty - A Sorption Test Case	p. 267
Introduction	p. 267
Methodology	p. 271
Modeling	p. 274
Results and Discussion	p. 282
Summary and Conclusions	p. 287
References	p. 288
Biogeochemical Uranium Redox Transformations: Potential Oxidants of Uraninite	p. 293
Introduction	p. 294
Uranium Oxidation-Reduction Reactions	p. 294
Experimental	p. 298
Results	p. 303
Discussion	p. 307
Implications for Biogeochemical Uranium Cycling	p. 310
References	p. 313
Phosphate Interactions with Iron (Hydr)oxides: Mineralization Pathways and Phosphorus Retention upon Bioreduction	p. 321
Introduction	p. 322
Experimental	p. 325
Results	p. 328
Discussion	p. 336
Conclusion and Implications	p. 341
References	p. 342
Influence of Phosphate on Adsorption and Surface Precipitation of Lead on Iron Oxide Surfaces	p. 349
Introduction	p. 350
Experimental	p. 352
Results and Discussion	p. 361
Summary	p. 370
References	p. 371
Uranium(VI) Release from Contaminated Vadose Zone Sediments: Estimation of Potential Contributions from Dissolution and Desorption	p. 375
Introduction	p. 376
Experimental	p. 379
Results	p. 388
Discussion	p. 409
Concluding Remarks	p. 412
References	p. 413
Arsenic Speciation in Solid Phases of Geothermal Fields	p. 417
Introduction	p. 418
Arsenic in Geothermal Systems	p. 419
Qualitative and Quantitative Characterization of Hot Spring Deposits	p. 423
XAS Analysis of Arsenic Solid-Phase Speciation in Hot Springs	p. 427
Concluding Remarks	p. 434
References	p. 435
Reactive Transport and Residence Times in Unsaturated Fractured Rocks from Field-Scale Experiments	p. 441
Introduction	p. 442
Setting	p. 443
Experimental Setup, Tracer Introduction and Recovery	p. 446
Reactive Transport	p. 455
Tracer Transport	p. 461
Fracture Networks and Flow Simulations	p. 464
Conclusions	p. 465
References	p. 467
Subject Index	p. 469
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