2008
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
FAIMON, Jiří a Martin BLECHAZákladní údaje
Originální název
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
Název česky
Interakce čerstvě vysráženého silikagelu s vodnými roztoky kyseliny křemičité za norlmálním podmínek: detailní analýza lineárního rychlostního zákona
Autoři
FAIMON, Jiří (203 Česká republika, garant) a Martin BLECHA (203 Česká republika)
Vydání
Aquatic Geochemistry, Netherlands, Springer Netherlands, 2008, 1380-6165
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
Geochemie
Stát vydavatele
Nizozemské království
Utajení
není předmětem státního či obchodního tajemství
Impakt faktor
Impact factor: 1.353
Kód RIV
RIV/00216224:14310/08:00025774
Organizační jednotka
Přírodovědecká fakulta
UT WoS
000253001100001
Klíčová slova česky
Rozpouštění, růst, dynamika, chyba, experiment, tok, model, reversibilita, silikagel
Klíčová slova anglicky
Dissolution; Growth; Dynamics; Error; Experiment; Flux; Model; Reversibility; Silica gel
Štítky
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 24. 9. 2009 07:58, doc. Ing. Jiří Faimon, Dr.
V originále
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.
Česky
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.
Návaznosti
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