FAIMON, Jiří and Martin BLECHA. Interaction of Freshly Precipitated Silica Gel with Aqueous Silicic Acid Solutions under Ambient and Near Neutral pH-conditions: A Detailed Analysis of Linear Rate Law. Aquatic Geochemistry. Netherlands: Springer Netherlands, 2008, vol. 14, No 1, p. 1-40. ISSN 1380-6165.
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Basic information
Original name Interaction of Freshly Precipitated Silica Gel with Aqueous Silicic Acid Solutions under Ambient and Near Neutral pH-conditions: A Detailed Analysis of Linear Rate Law
Name in Czech Interakce čerstvě vysráženého silikagelu s vodnými roztoky kyseliny křemičité za norlmálním podmínek: detailní analýza lineárního rychlostního zákona
Authors FAIMON, Jiří (203 Czech Republic, guarantor) and Martin BLECHA (203 Czech Republic).
Edition Aquatic Geochemistry, Netherlands, Springer Netherlands, 2008, 1380-6165.
Other information
Original language English
Type of outcome Article in a journal
Field of Study Geochemistry
Country of publisher Netherlands
Confidentiality degree is not subject to a state or trade secret
Impact factor Impact factor: 1.353
RIV identification code RIV/00216224:14310/08:00025774
Organization unit Faculty of Science
UT WoS 000253001100001
Keywords (in Czech) Rozpouštění, růst, dynamika, chyba, experiment, tok, model, reversibilita, silikagel
Keywords in English Dissolution; Growth; Dynamics; Error; Experiment; Flux; Model; Reversibility; Silica gel
Tags dissolution, dynamics, error, experiment, Flux, growth, model, reversibility, Silica gel
Tags International impact, Reviewed
Changed by Changed by: doc. Ing. Jiří Faimon, Dr., učo 1405. Changed: 24/9/2009 07:58.
Abstract
Interaction of freshly precipitated silica gel with aqueous solutions was studied at laboratory batch experiments under ambient and near neutral pH-conditions. The overall process showed excellent reversibility: gel growth could be considered as an opposite process to dissolution and a linear rate law could be applied to experimental data. Depending on the used rate law form, the resulting rate constants were sensitive to errors in parameters/variables such as gel surface area, equilibrium constants, Si-fluxes, and reaction quotients. The application of an Integrated Exponential Model appeared to be the best approach for dissolution data evaluation. In contrast, a Differential Model gave best results for growth data modeling. An universal value of activation energy for growth of any silica polymorph is not consistent with the value for silica gel growth, which questions the hypothesis about one unique activated complex controlling the silica polymorph growth.
Abstract (in Czech)
Interaction of freshly precipitated silica gel with aqueous solutions was studied at laboratory batch experiments under ambient and near neutral pH-conditions. The overall process showed excellent reversibility: gel growth could be considered as an opposite process to dissolution and a linear rate law could be applied to experimental data. Depending on the used rate law form, the resulting rate constants were sensitive to errors in parameters/variables such as gel surface area, equilibrium constants, Si-fluxes, and reaction quotients. The application of an Integrated Exponential Model appeared to be the best approach for dissolution data evaluation. In contrast, a Differential Model gave best results for growth data modeling. An universal value of activation energy for growth of any silica polymorph is not consistent with the value for silica gel growth, which questions the hypothesis about one unique activated complex controlling the silica polymorph growth.
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MSM0021622412, plan (intention)Name: Interakce mezi chemickými látkami, prostředím a biologickými systémy a jejich důsledky na globální, regionální a lokální úrovni (INCHEMBIOL) (Acronym: INCHEMBIOL)
Investor: Ministry of Education, Youth and Sports of the CR, Interactions among the chemicals, environment and biological systems and their consequences on the global, regional and local scales (INCHEMBIOL)
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