scholarly journals Modelling of acid-base titration curves of mineral assemblages

2016 ◽  
Vol 14 (1) ◽  
pp. 316-323 ◽  
Author(s):  
Karel Stamberg ◽  
Barbora Drtinová ◽  
Helena Filipská ◽  
Dušan Vopálka
Keyword(s):  
Sedimentary Rock ◽  
Acid Base ◽  
Surface Sites ◽  
Titration Curves ◽  
Acid Base Titration ◽  
Mineral Assemblages ◽  
Basic Parameters ◽  
The Individual ◽  
Modelling Approaches

AbstractThe modelling of acid-base titration curves of mineral assemblages was studied with respect to basic parameters of their surface sites to be obtained. The known modelling approaches, component additivity (CA) and generalized composite (GC), and three types of different assemblages (fucoidic sandstones, sedimentary rock-clay and bentonite-magnetite samples) were used. In contrary to GC-approach, application of which was without difficulties, the problem of CA-one consisted in the credibility and accessibility of the parameters characterizing the individual mineralogical components.

Acid-Base Titration Curves in Disproportionating Redox Systems

1994 ◽  
Vol 71 (8) ◽  
pp. 632 ◽  
Author(s):  
Tadeusz Michalowski ◽  
Andrzej Lesiak
Keyword(s):  
Redox Systems ◽  
Acid Base ◽  
Titration Curves ◽  
Acid Base Titration

Acid–base titration curves of solid humic acids

2008 ◽  
Vol 68 (1) ◽  
pp. 242-247 ◽  
Author(s):  
Pavel Janoš ◽  
Sylvie Kříženecká ◽  
Libuše Madronová
Keyword(s):  
Humic Acids ◽  
Acid Base ◽  
Titration Curves ◽  
Acid Base Titration

Equivalence Points and Inflexion Points in Acid-Base Titration Curves

1963 ◽  
Vol 16 (5) ◽  
pp. 759 ◽  
Author(s):  
RH Stokes
Keyword(s):  
Strong Acid ◽  
Ionization Constants ◽  
Weak Acids ◽  
Acid Base ◽  
Strong Base ◽  
Titration Curves ◽  
Acid Base Titration

General equations are derived for the relation between pH and stoichiometric degree of neutralization in the titration of monoprotic and diprotic weak acids (or bases) with strong acid or strong base. From these equations the number and position of inflexion points in the curves is derived, and their relation to the equivalence points is shown. Methods for determining ionization constants from inflexion points are discussed.

The Simms Constants as Parameters in Hyperbolic Functions Related to Acid-Base Titration Curves

2018 ◽  
Vol 02 (01) ◽  
Author(s):  
Anna Maria Michalowska Kaczmarczyk ◽  
Aneta Sporna Kucab ◽  
Agustin Garcia Asuero ◽  
Tadeusz Michalowski
Keyword(s):  
Acid Base ◽  
Hyperbolic Functions ◽  
Titration Curves ◽  
Acid Base Titration

On the existence of inflection points of acid-base titration curves

1979 ◽  
Vol 294 (5) ◽  
pp. 405-406 ◽  
Author(s):  
Claus Bliefert ◽  
Alfred Linek ◽  
Gerd Morawietz
Keyword(s):  
Acid Base ◽  
Titration Curves ◽  
Inflection Points ◽  
Acid Base Titration

Approaches to modelling uranium(VI) adsorption on natural mineral assemblages

2000 ◽  
Vol 88 (9-11) ◽  
Author(s):  
T.D. Waite ◽  
James A. Davis ◽  
B.R. Fenton ◽  
Timothy E. Payne
Keyword(s):  
Performance Assessment ◽  
Goodness Of Fit ◽  
Surface Complexation ◽  
Acid Base ◽  
Surface Complexes ◽  
Natural Mineral ◽  
Surface Complexation Model ◽  
Surface Sites ◽  
Stepwise Manner ◽  
Mineral Assemblages

Component additivity (CA) and generalised composite (GC) approaches to deriving a suitable surface complexation model for description of U(VI) adsorption to natural mineral assemblages are pursued in this paper with good success. A single, ferrihydrite-like component is found to reasonably describe uranyl uptake to a number of kaolinitic iron-rich natural substrates at pH > 4 in the CA approach with previously published information on nature of surface complexes, acid-base properties of surface sites and electrostatic effects used in the model. The GC approach, in which little pre-knowledge about generic surface sites is assumed, gives even better fits and would appear to be a method of particular strength for application in areas such as performance assessment provided the model is developed in a careful, stepwise manner with simplicity and goodness of fit as the major criteria for acceptance.

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