By Werner Stumm
Offers an advent to the chemistry of the solid-water interface, progressing from the easy to extra complicated and utilized. Discusses the $64000 interfaces in normal structures, in particular geochemistry, in ordinary waters, soils and sediments. The strategies taking place at mineral-water, particle-water and organism-water interfaces play serious roles in regulating the composition and ecology of oceans and clean waters, the improvement of soils and plant nutrient's provide, keeping the integrity of water repositories and in such purposes as water know-how and corrosion technological know-how.
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Extra resources for Chemistry of the solid-water interface: processes at the mineral-water and particle-water interface in natural systems
With the help of such constants one can describe how the concentration of reactive elements (metal ions, ligands) in soils, waters and sediments depend on the distribution between surfaces and the solution and on pH and other solution variables. The geochemical fate of most trace elements is controlled by the reaction of solutes with solid surfaces. 3: Stoichiometry of H+ Release by Binding of Metal Ions; The Kurbatov Plot Metal ion binding to hydrous oxides can occur as monodentate or bidentate surface complexes (Eqs.
SA + H20 ; K = 10-5 The wall of a glass beaker contains ",SiOH groups. Why can dilute solutions of metal ions (pH >7) not be stored in glass vessels? 10) Check the validity of the following statement: If a suspension of a hydrous oxide does not change its pH upon addition of NaN03 then this pH value is the pH pzc . Reading Suggestions 41 Reading Suggestions Dzombak, D. , and F. M. M. Morel (1990), Surface Complexation Modeling; Hydrous Ferric Oxide, Wiley-Interscience, New York. Kung, H. H. (1989), Transition Metal Oxides: Surface Chemistry and Catalysis, Elsevier, Amsterdam.
6 The Coordinative Unsaturation of Non-Hydrous Oxide Surfaces As we have seen in Fig. 19) establishes the functional groups on hydrous oxide surfaces. The driving force for this water absorption is the coordinative unsaturation of the (non-hydrous) oxide. , reduction of NO). Usually, activation of an oxide by heating is a pre- 38 The Coordinative Unsaturation ... requisit for chemisorption and catalysis; one of the reasons is that H2 0 "poisons" the surface and hydroxyl groups that are formed in a moist atmosphere usually inhibits molecular adsorption.