2 edition of kinetics of base cation release due to chemical weathering found in the catalog.
kinetics of base cation release due to chemical weathering
Harald U. Sverdrup
|Other titles||Kinetics chemical weathering.|
|Statement||Harald U. Sverdrup.|
|The Physical Object|
|Pagination||245,  p. :|
|Number of Pages||245|
|ISBN 10||9179661092, 0862382475|
The release rate of base cations due to weathering range from to kmolc/ha/yr in the 0–50 cm soil layer, thus demonstrating the high sensitivity of the coarse and thin podzols studied. Chemical weathering: Decomposes rocks and minerals by chemical alteration - Unlike mechanical weathering, the chemistry and mineralogy changes during weathering - Hot and wet environments accelerate chemical weathering - Chemical weathering occurs in all environments, except, possibly, permanently frozen polar regions.
Rock mass are subject to continuous changes induced by physical and chemical processes of natural and anthropic origin. Such changes affect their mechanical properties. To quantitatively evaluate the hydro-chemical corrosion, the theories of chemical thermodynamic and chemical kinetics are introduced. An index was proposed, which provides a criterion to judge whether the corrosion would Author: Peng Li, Guo He Li, Jian Liu. Chemical weathering impacts the samplers and instruments were installed to a maximum depth of m due to borehole collapsed. L. Base cation mineral weathering and total release Author: Jiamin Wan, Tetsu K. Tokunaga, Kenneth H. Williams, Wenming Dong, Wendy Brown, Amanda N. Henderson.
Base cation fluxes in the stream, plant uptake, weathering, release from the exchange complex, and deposition were calculated for the whole period to estimate their relative importance at each site. These results are displayed for SET II in Table 4. When considering the total amount of BC, fluxes decreased in the order: runoff in the stream Cited by: Chemical Kinetics: From Molecular Structure to Chemical Reactivity, Second Edition, is written for both the specialist in the field and upper undergraduate and graduate-level chemistry bridges the gap between the two with a path that leads the reader from phenomenological approach, to rates of chemical reactions, and then to the state-of-the-art calculation of the rate Book Edition: 2.
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Book Review: The kinetics of base cation release due to chemical weathering. Harald U. Sverdrup. Lund University Press, Sweden,p., (ISBN )Cited by: Cation release rates to catchment runoff from chemical weathering were assessed using an integrated catchment model that included the soil's unsaturated, saturated and riparian zones.
In-situ mineral dissolution rates were calculated in these zones as a function of pH, aluminum and dissolved organic carbon (DOC) concentrations along a hillslope in Northern Sweden where soil water was monitored Cited by: Data Fitting Techniques with Applications to Mineral Dissolution Kinetics.
A common problem in chemical kinetics is the development of a rate law that describes the dependence of the reaction rate on the surrounding conditions such as concentrations of reacting species or temperature of the reacting media (see Chap.
1).Cited by: Chemical Weathering & Acid-Base Reactions Acid Rain ÆFocus on Acid Inputs & Determining Factors •Problems due to the burning of high-sulfur coal have lessened with use of low-sulfur coal. Problem still persists •Production zones: dominantly in the mid-Eastern States and in Eastern Size: 8MB.
T1 - The importance of mineral determinations to PROFILE base cation weathering release rates. T2 - A case study. AU - Casetou-Gustafson, Sophie. AU - Akselsson, Cecilia. AU - Hillier, Stephen.
AU - Olsson, Bengt A. PY - Y1 - Cited by: 3. title = "The importance of mineral determinations to PROFILE base cation weathering release rates: A case study", abstract = "Accurate estimates of base cation weathering rates in forest soils are crucial for policy decisions on sustainable biomass harvest levels and for calculations of critical loads of by: 3.
The revised set of equations gave a 50 % lower base cation release ( eq m −2 yr −1) than the original PROFILE equations, and are in better agreement with mass balance calculations of weathering rates.
The results from this study thus demonstrate that the revised mineral dissolution equations for PROFILE are a major step forward in Cited by: 2.
High uncertainties in mineralogy, due for example to different A2M assumptions, had surprisingly little effect on the predicted weathering of Na-and K-bearing minerals.
This can be explained by the fact that the weathering rate constants for the minerals involved, e.g. K Cited by: 3. Accurate estimates of base cation weathering rates in forest soils are crucial for policy decisions on sustainable biomass harvest levels and for calculations of critical loads of acidity.
The PROFILE model is one of the most frequently used methods to quantify weathering rates, where the quantitative mineralogical input has often been calculated by the A2M ("Analysis to Mineralogy") program Cited by: 3. The importance of mineral determinations to PROFILE base cation weathering release rates: A case study due for example to different A2M assumptions, had surprisingly little effect on the.
The PHRQKIN program has been developed to handle the chemical kinetics of aluminium silicate minerals in weathering reactions. The dissolution model used in the program is based on transition state theory and surface complexation theory.
The precipitation reaction may be handled either kinetically or with by: 1. A new model for base cation release due to chemical weathering of soil minerals has been developed based on transition state theory, and included in t Cited by: Cation release rates to catchment runoff from chemical weathering were assessed using an integrated catchment model that included the soil's unsaturated, saturated and riparian zones.
In-situ mineral dissolution rates were calculated in these zones as a function of pH, aluminum and dissolved organic carbon (DOC) concentrations along a hillslope in Northern Sweden where soil water Cited by: Additional Physical Format: Online version: Sverdrup, Harald Ulrik, Kinetics of base cation release due to chemical weathering.
Lund, Sweden: Lund University Press, © As weathering of oxide minerals such as cation-bearing silicates progresses, the oxide ion acts as a strong base and consumes protons. The reaction releases a molar charge equivalent of base cations to solution and this increase in alkalinity raises pH; more CO 2 dissolves (is consumed) due to the increased solubility of inorganic carbon ions Cited by: 7.
Sverdrup H U () The kinetics of base cation release due to chemical weathering. Lund Univ Press, Lund, Sweden Google Scholar Swoboda-Colberg N G and Drever J I () Mineral dissolution rates in plot-scale field and laboratory by: (English) In: Chemical Geology, ISSNE-ISSNVol.p.
Article in journal (Refereed) Published Abstract [en] Cation release rates to catchment runoff from chemical weathering were assessed using an integrated catchment model that included the soil's unsaturated, saturated and riparian by: Sverdrup HU () The kinetics of base cation release due to chemical weathering.
Lund University Press, Lund, pp. Google Scholar Tan KH () Degradation of soil minerals by organic by: Base Cation 86Sr Ratio Tectonic Uplift Chemical Weathering Planetary Science Letter These keywords were added by machine and not by the authors.
This process is experimental and the keywords may be updated as the learning algorithm by: Attachment B--Description of Database Files and Listing. Three database files are distributed with the program: H.U.,The kinetics of base cation release due to # chemical weathering: Lund University Press, Lund,The kinetics of base cation release due to # chemical weathering: Lund University Press, Lund.
The PROFILE model is used extensively in the European Critical Loads programme as an aid to international negotiations on SO2 emission abatement. PROFILE calculates the rates of cation release by mineral weathering and it then uses these data to calculate soil solution and runoff chemistry.
No independent assessment of the underlying assumptions and data in the model has been published Cited by: The kinetics of weathering describe the dependence on chemical state activity parameters and the configuration of the dissolving mineral matrix.
For normal resource estimates of weathering, covering a time span of centuries, we do not normally subtract the amount dissolved from the amount of by: Chemical weathering and cation loss in a base-poor watershed Article (PDF Available) in Geological Society of America Bulletin (1) January with Reads How we measure 'reads'.